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Applies to plate, hot-rolled and cold-rolled corrosion-resistant, heat-resistant and heat-resistant steel, manufactured in sheets

• Replaces GOST 7350-66 Information from the list "Index state standards USSR 1980", Standards Publishing House 1980

Edition (November 2009) with Changes No. 1, 2, 3

1 Classification

2 Assortment

3 Technical requirements

4 Acceptance rules

5 Test methods

6 Packaging, labeling, transportation and storage

This GOST is located in:

Organizations:

21.07.1977	Approved	State Committee of Standards of the Council of Ministers of the USSR	1786
	Published	Standardinform	2009
	Published	IPC Standards Publishing House	2002
	Published	Publishing house of standards	1991
	Published	Publishing house of standards	1977
	Designed by	Ministry of Ferrous Metallurgy of the USSR

Plate steel, corrosion-resistant, heat-resistant and high-temperature. Specifications

• GOST 1497-84Metals. Tensile test methods
• GOST 5632-72High-alloy steels and alloys are corrosion-resistant, heat-resistant and heat-resistant. Stamps. Replaced by GOST 5632-2014.
• GOST 6996-66Welded joints. Methods for determining mechanical properties
• GOST 7564-97Rental General rules for sampling, blanks and specimens for mechanical and technological tests
• GOST 7566-94Metal products. Reception, labeling, packaging, transportation and storage. Replaced by GOST 7566-2018.
• GOST 9651-84Metals. Tensile test methods at elevated temperatures
• GOST 19903-74Rolled sheets hot rolled Assortment. Replaced by GOST 19903-2015.
• GOST 19904-90Rolled sheets cold rolled. Assortment
• GOST 20072-74The steel is heat resistant. Specifications
• GOST 9012-59Metals. Method Brinell hardness measurements
• GOST 9454-78Metals. Method Impact bending tests at low, room and elevated temperatures
• GOST 2789-73Surface roughness. Parameters and characteristics
• GOST 12345-2001Alloy and high alloy steels. Methods for determining sulfur
• GOST 28473-90Cast iron, steel, ferroalloys, chrome, manganese metal. General requirements for analysis methods
• GOST 19300-86Instruments for measuring surface roughness using the profile method. Contact profilers. Types and main parameters
• GOST 12346-78silicon
• GOST 12347-77Alloy and high alloy steels. Determination methods phosphorus
• GOST 12348-78Alloy and high alloy steels. Determination methods manganese
• GOST 12349-83Alloy and high alloy steels. Determination methods tungsten
• GOST 12350-78Alloy and high alloy steels. Determination methods chrome
• GOST 12352-81Alloy and high alloy steels. Determination methods nickel
• GOST 12353-78Alloy and high alloy steels. Determination methods cobalt
• GOST 12354-81Alloy and high alloy steels. Determination methods molybdenum
• GOST 12355-78Alloy and high alloy steels. Determination methods copper
• GOST 12356-81Alloy and high alloy steels. Determination methods titanium
• GOST 12357-84Alloy and high alloy steels. Determination methods aluminum
• GOST 12359-99Become
• GOST 12360-82Alloy and high alloy steels. Determination methods boron
• GOST 12362-79Alloy and high alloy steels. Determination methods microimpurities of antimony, lead, tin, zinc and cadmium
• GOST 12363-79Alloy and high alloy steels. Determination methods Selena
• GOST 12364-84Alloy and high alloy steels. Determination methods cerium
• GOST 12365-84Alloy and high alloy steels. Determination methods zirconium
• GOST 1778-70Steel. Metallographic methods for determining non-metallic inclusions
• GOST 5639-82Steels and alloys. Methods for identifying and determining grain size
• GOST 7565-81Cast iron, steel and alloys. Sampling method for determining chemical composition
• GOST 12358-2002Alloy and high alloy steels. Determination methods arsenic
• GOST 12361-2002Alloy and high alloy steels. Determination methods niobium
• GOST 12344-2003Alloy and high alloy steels. Determination methods carbon
• GOST 14019-2003Metal materials. Bend test method
• GOST 6032-2003Become and corrosion-resistant alloys. Test methods for resistance to intergranular corrosion. Replaced by GOST 6032-2017.
• GOST 12351-2003Become alloyed and highly alloyed. Methods for determining vanadium
• GOST 12359-81Become carbon, alloy and high alloy. Methods for determining nitrogen. Replaced by GOST 12359-99.

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INTERSTATE STANDARD

THICK STEEL
CORROSION-RESISTANT, HEAT-RESISTANT
AND HEAT RESISTANT

TECHNICAL CONDITIONS

Date of introduction 01/01/79

This standard applies to plate, hot-rolled and cold-rolled corrosion-resistant, heat-resistant and heat-resistant steel (hereinafter referred to as steel), manufactured in sheets.

1. CLASSIFICATION

1.1. Steel is divided into:

According to the condition of the material and the quality of the surface into groups:

cold rolled cold hardened - H1,

cold-rolled semi-hardened - PN1,

cold rolled, heat treated, pickled or after bright annealing - M2a, M3a, M4a, M5a,

cold-rolled heat-treated - M5v,

hot rolled, heat treated,

etched or after bright annealing - M2b, M3b, M4b, M5b,

hot-rolled, heat-treated, unetched - M5g,

hot rolled without heat treatment and unetched - 5d;

According to rolling accuracy:

increased accuracy - A,

normal accuracy - B;

By type of edges:

edged - Oh,

unedged - BUT;

By deviation from flatness of sheets with a temporary resistance of 690 N/mm 2 (70 kgf/mm 2) or less by:

particularly high flatness - software,

high flatness - PV,

improved flatness - PU,

normal flatness - PN.

1.2. It is allowed to produce thick sheet steel with a rolling accuracy higher than that specified in the order.

2. ASSORTMENT

2.1. Hot-rolled plate steel is made with a thickness of 4 to 50 mm, cold-rolled steel - from 4 to 5 mm.

2.2. The shape, dimensions and maximum deviations in dimensions of thick sheet steel must meet the requirements:

Hot-rolled sheets with a thickness of more than 20 mm with a cut edge are produced by agreement between the manufacturer and the consumer.

High-precision hot-rolled sheets A are produced according to consumer demand.

(Changed edition, Amendment No. 2).

2.3. The deviation of the sheets from flatness must correspond to that indicated in the table. 1.

Table 1

Tensile strength, N/mm 2 (kgf/mm 2)	Deviation of sheets from flatness per 1 m length, mm
	hot rolled	cold rolled
Up to 690 (70) incl.	The chemical composition of steel grades 03Х23Н6 and 03Х22Н6М2 must correspond to table. 1a. Table 1a steel grade Mass fraction of elements, % Manganese Molybdenum Notes: 1. In finished rolled products, deviations in mass fraction are allowed: silicon +0.4%, sulfur +0.005%, nickel ±0.2%, chromium +0.5%. 2. In steel grade 03Х22Н6М2, an increase in the mass fraction of molybdenum of +0.2% is allowed. 3. The allowed mass fraction of residual titanium is no more than 0.05%, other residual elements - in accordance with GOST 5632. (Changed edition, Amendment No. 2). 3.3. The sheets should be free of traces of shrinkage, delamination, foreign inclusions and bubbles. 3.4. The mechanical properties of heat-treated sheets must comply with the standards specified in table. 2. table 2 steel grade Heat treatment mode Annealing at 840 - 870 °C, air cooling Normalization or hardening at 1000 - 1050 °C, air cooling, tempering at 680 - 780 °C, furnace or air cooling Annealing according to manufacturer's conditions No more than 750 (76) Annealing or tempering at 650 - 700 °C By agreement between the manufacturer and the consumer Annealing according to manufacturer's conditions No more than 1030 (105) Quenching at 960 - 1020 °C, cooling in air, tempering at 680 - 780 °C, cooling in air or with a furnace Annealing according to manufacturer's conditions No more than 650 (66) Quenching at 960 - 1020 °C, cooling in water or in air, tempering at 680 - 780 °C, cooling in air or with a furnace Annealing according to manufacturer's conditions No more than 650 (66) Annealing or tempering at 760 - 780 °C, cooling in air or with a furnace Annealing or tempering at 760 - 780 °C, air cooling Annealing or tempering at 740 - 780 °C, cooling in water Quenching at 1000 - 1050 °C, cooling in water Quenching 1030 - 1050 °C, cooling in water Quenching at 950 - 1050 °C, cooling in water or air Quenching at (1050 ± 25) °C, cooling in water Quenching at 1030 - 1050 °C, cooling in water Quenching at 1030 - 1120 °C, cooling in water Quenching at 1050 - 1080 °C, cooling in water or air 12X17G9AN4 * Quenching at 1030 - 1100 °C, cooling in water 08Х17Н15М3Т * Quenching at 1080 - 1120 °C, cooling in water Hardening at 1050 - 1120 °C, cooling in water or under a water shower Quenching at 1030 - 1080 °C, cooling in water or air Quenching at 1050 - 1100 °C, cooling in water or air Quenching at 1000 - 1080 °C, cooling in water or air Quenching at 1030 - 1080 °C, cooling in water or air Quenching at 1030 - 1080 °C, cooling in water or air Quenching at 1000 - 1100 °C, cooling in water or air Quenching at 1030 - 1130 °C, cooling in water Quenching at 1040 - 1080 °C, cooling in water 12X25N16G7AR * Quenching at 1050 - 1150 °C, cooling in water or air 15Х18Н12С4ТУ * Quenching at 1020 - 1050 °C, cooling in water or air 690 - 930 (70 - 95) Normalization at (1040 ± 10) °C, air cooling No more than 1180 (120) No more than 390 (40) 03Х21Н21М4ГБ * Hardening at 1060 - 1120 °C, cooling in water or under a water shower Hardening at 980 - 1020 °C, cooling in water or under a water shower Quenching at 1030 - 1070 °C, air cooling, first tempering twice at 740 - 760 °C, cooling in air or water, second tempering at 580 - 680 °C, air cooling No more than 735 (75) Quenching 950 - 1080 °C, cooling in water Quenching at 1080 - 1100 °C, cooling in water or air * For sheets of thickness St. 25 mm mechanical properties are not standardized, determination is required. Note. Annealing of steel sheets of grades 20X13, 12X13, 08X13 is carried out at the request of the consumer. The standards are not mandatory until 01/01/94. The definition is required for the data set. 3.5. The mechanical properties of the sheets, determined on control heat-treated samples, must comply with the standards specified in table. 3. Table 3 steel grade Sample thermal treatment mode Tensile strength s in, N/mm 2 (kgf/mm 2) Yield strength s t, N/mm 2 (kgf/mm 2) Relative elongation δ5,% Impact strength, KCU, J/cm 2 (kgf m/cm 2) Quenching at 960 - 1050 °C, cooling in water or air, tempering at 275 - 350 °C, cooling in air Quenching at 950 - 980 °C, air cooling, tempering at 300 - 350 °C, air cooling Normalization at (975 ± 10) °C, cold treatment at -70 °C for 2 hours, tempering at (425 ± 10) °C for 1 hour, air cooling Note. By agreement between the manufacturer and the consumer, it is allowed to change the heat treatment mode with a corresponding change in the standards of mechanical properties. (Changed edition, Amendment No. 2). 3.6. The mechanical properties of cold-worked and semi-hardened sheets are not standardized, but are required to be determined. Standards are established by agreement between the manufacturer and the consumer. 3.7. In terms of type and surface quality, the sheets must meet the requirements specified in table. 4. Table 4 Surface group Symbol groups Material condition Surface characteristics Name of allowed surface defects Maximum depth of defects Hard-worked (N) and semi-hardened (PN) Shiny, without blistering bubbles, rolled out bubbles, captivity, ripples, over-etching, with a slight difference in shades Scratches, nicks, prints, marks, rolled prints Ripple, scratches, nicks, prints, marks, rolled out prints Depth that does not take the sheet beyond the maximum deviations Same with shells a) Cold rolled, heat treated or annealed Silver-matte or shiny, without blistering bubbles, rolled out bubbles, captivity, cracks, scale and over-etching 1/2 the sum of maximum deviations in thickness b) Hot rolled, heat treated, pickled or after bright annealing Same with shells a) Cold rolled, heat treated, pickled or after bright annealing Ripple, scratches, prints, nicks, scratches, rolled out prints Sum of maximum deviations in thickness b) Hot rolled, heat treated, pickled or after bright annealing Same with shells a) Hot rolled, heat treated, pickled or after bright annealing Matte with a gray tint or shiny, without bubbles, swelling, rolled bubbles, cracks, scale and over-etching Ripple, scratches, prints, nicks, scratches, small rolled films, rolled prints b) Hot rolled, heat treated, pickled or after bright annealing Same with shells c) Cold rolled, heat treated Ripple, scratches, prints, nicks, scratches, small rolling films, rolled prints, scale d) Hot rolled, heat treated Ripple, scratches, prints, nicks, scratches, small rolled films, cavities, rolled prints, scale e) Hot rolled, unheated and unetched Notes: 1. Requirements for the quality of the surface of heat-treated steel in terms of the number and nature of defects can be specified by agreement of the parties using standards. 2. Local gentle cleaning of the surface is allowed, and the depth of cleaning should not exceed the norms for the depth of permissible defects. Arson from clean-up operations is not permitted. 3. At the consumer’s request, sheets are produced without cleaning or cutting out unacceptable defects. 4. Tempering colors and various shades from pickling on cold-rolled and hot-rolled heat-treated sheets, pickled or after bright annealing, are not a defective sign. 5. Welding of defects on sheets is allowed by agreement with the consumer. (Changed edition, Amendment No. 2). 3.8. Sheets made of steel grades 09Х17Н7У, 03Х18Н11, 03Х17Н14М3, 08Х22Н6Т, 08Х21Н6М2Т, 10Х14Г14Н4Т, 12Х17Г9АN4, 08Х17Н13М2Т, 10Х17Н13М2Т, 10Х17Н13М3Т , 08Х17Н15М3Т, 12Х18Н9, 12Х18Н9Т, 04Х18Н10, 08Х18Н10, 08Х18Н10Т, 12Х18Н10Т, 08Х18Н12Т, 12Х18Н12Т, 08Х18Н12Б, 08Х18Г8Н2Т, 03 Х21Н21М4ГБ, 03Х22Н6М2, 03Х23Н6, 06ХН28МДТ, 03ХН28МДТ should not be prone to intergranular corrosion. Intergranular corrosion standards for steel grades 03Х22Н6М2 and 03Х23Н6 are not mandatory until 01/01/93. The definition is required for the data set. (Changed edition, Amendment No. 2, 3). 3.9. At the consumer's request, sheets are produced with the following standardization: a) susceptibility to embrittlement of steel grade 12Х21Н5Т. The heat treatment regime and standards must correspond to those indicated in the table. 5; b) surface roughness of cold-worked and semi-hardened steel; c) alpha phases in austenitic steels; d) susceptibility to intergranular corrosion for steel grades not specified in GOST 6032; e) impact strength of steels, for which in table. 2 impact strength not specified; f) grain size; g) mechanical properties of hot-rolled sheets supplied without heat treatment and pickling; h) mechanical properties at elevated temperatures; i) steel contamination with non-metallic inclusions; j) mechanical properties different from those indicated in table. 2. Note. Norms by subparagraphs b, c, d - j, as well as control methods according to subparagraphs c, d established by agreement between the manufacturer and the consumer. Table 5 3.10. At the consumer's request, sheets are produced: a) checking the susceptibility to intergranular corrosion of steel grades 08Х17Т, 15Х25Т and 07Х16Н6; b) checking internal defects using non-destructive methods. Standards are established by agreement between the manufacturer and the consumer; c) without mechanical or other tests, provided that the standards established in this standard are met; d) with control of the hardness of heat-treated sheets; e) with bending test. (Changed edition, Amendment No. 2, 3). 4. ACCEPTANCE RULES 4.1. Sheet steel is accepted in batches. The batch must consist of metal from one heat, one state of material, one thickness, and for heat-treated steel - one heat treatment mode. Sheets that differ in thickness by no more than 40% for sheets with a thickness of 4 to 12 mm, and by no more than 5 mm for sheets with a thickness of St. 12 mm. By agreement between the manufacturer and the consumer, batches consisting of several heats of the same brand or one heat of sheets of different thickness are allowed. (Changed edition, Amendment No. 3). 4.1.1. Each batch must be accompanied by a quality document in accordance with GOST 7566 with additional results: Testing the mechanical properties of cold-worked and semi-hardened sheets and sheets with a thickness of St. 25 mm; Testing sheets of steel grades 03Х22Н6М2 and 03Х23Н6 for susceptibility to intergranular corrosion; Checking sheets for internal defects; Hardness control. (Introduced additionally, Amendment No. 2). 4.2. All sheets of the batch are subjected to surface control, deviations from flatness and dimensions. The manufacturer is allowed to control deviations from flatness and dimensions of sheets selectively, but not less than on one sheet of each thickness in the batch. 4.3. To check the quality of sheets, the following are selected: For tensile testing, determination of impact strength, grain size and surface roughness - one sheet per batch; To determine the susceptibility to intergranular corrosion - according to GOST 6032; To determine the contamination of steel with non-metallic inclusions - according to GOST 1778; To check the chemical composition - according to GOST 7565. To check the mechanical properties, susceptibility to intergranular corrosion, contamination with non-metallic inclusions and grain size, it is allowed to select the thickest sheet from a batch consisting of sheets of different thicknesses and the same heat treatment mode. 4.4. If unsatisfactory test results are obtained for at least one of the indicators, repeated tests are carried out on a sample selected in accordance with GOST 7566. 5. TEST METHODS 5.1. Sampling to determine the chemical composition of steel - according to GOST 7565. The chemical composition is determined according to GOST 12344 - GOST 12365, GOST 28473 or other methods that ensure the required accuracy of analysis.

Designation	GOST 7350-77
Title in Russian	Thick sheet steel is corrosion-resistant, heat-resistant and heat-resistant. Specifications
Title in English	Plate steel, corrosion-resistant, heat-resistant and high-temperature. Specifications
Effective date	01.01.1979
OKS	77.140.20
OKP code	098500; 098600
KGS code	B33
Index of the GRNTI rubricator	534331
Abstract (scope of application)	This standard applies to plate, hot-rolled and cold-rolled corrosion-resistant, heat-resistant and heat-resistant steel manufactured in sheets
Type of standard	Standards for products (services)
Designation of the replacement(s)	GOST 7350-66
Contains requirements: CMEA	ST SEV 6434-88
Normative references to: GOST	GOST 1497-84; GOST 1778-70; GOST 2789-73; GOST 5632-72; GOST 5639-82; GOST 6032-89; GOST 6996-66; GOST 7564-97; GOST 7565-81; GOST 7566-94; GOST 9012-59; GOST 9454-78; GOST 9651-84; GOST 12344-88; GOST 12345-2001; GOST 12346-78; GOST 12347-77; GOST 12348-78; GOST 12349-83; GOST 12350-78; GOST 12351-81; GOST 12352-81; GOST 12353-78; GOST 12354-81; GOST 12355-78; GOST 12356-81; GOST 12357-84; GOST 12358-82; GOST 12359-99; GOST 12360-82; GOST 12361-82; GOST 12362-79; GOST 12363-79; GOST 12364-84; GOST 12365-84; GOST 14019-80; GOST 19300-86; GOST 19903-74; GOST 19904-90; GOST 20072-74; GOST 20560-81
Document submitted by CIS organization	Ministry of Cherry and Metallurgical Metals of the USSR
Rostekhregulirovaniya Department	320 - Department of Standardization and Certification of Raw Materials and Supplies
MND developer	Russian Federation
Interstate TC	120 - Cast iron, steel, rolled products
Last edition date	01.10.2002
Change number(s)	reissue with changes 1; 2; 3
Included in the collection	High quality steels
Number of pages (original)	11
Organization - Developer	Ministry of Cherry and Metallurgical Metals of the USSR
Status	Valid

THICK STEEL
CORROSION-RESISTANT,
HEAT-RESISTANT AND HEAT-RESISTANT

TECHNICAL CONDITIONS

GOST 7350-77
(ST SEV 6434-88)

STATE COMMITTEE OF THE USSR
ON PRODUCT QUALITY MANAGEMENT AND STANDARDS

Moscow

STATE STANDARD OF THE USSR UNION

Validity from 01.01.79

until 01/01/94

This standard applies to plate, hot-rolled and cold-rolled corrosion-resistant, heat-resistant and heat-resistant steel manufactured in sheets.

The standard fully complies with ST SEV 6434-88.

1. CLASSIFICATION

1.1. Thick-sheet corrosion-resistant, heat-resistant and heat-resistant steel is divided into:

according to the condition of the material and surface quality into groups:

cold-rolled hard-worked - H 1,

cold-rolled semi-hardened - PN1,

cold rolled, heat treated, pickled or after bright annealing - M2a, M3a, M4a, M5a,

cold-rolled heat-treated - M5v,

hot rolled, heat treated,

etched or after bright annealing - M2b, M3b, M4b, M5b,

hot-rolled, heat-treated, unetched - M5g,

hot rolled without heat treatment and unetched - M5d;

according to rolling accuracy:

increased accuracy - A,

normal accuracy - B;

according to the type of edges:

edged - O;

unedged - BUT;

for non-flatness of sheets with a temporary resistance of 690 N/mm 2 (70 kgf/mm 2) or less by:

especially high flatness - PO; high flatness - PV,

improved flatness - PU,

normal flatness - PN.

1.2. It is allowed to produce thick sheet steel with a rolling accuracy higher than that specified in the order.

2. ASSORTMENT

2.1. Hot-rolled plate steel is made with a thickness of 4 to 50 mm, cold-rolled steel with a thickness of 4 to 5 mm.

2.2. The shape, dimensions and maximum deviations in dimensions of thick sheet steel must meet the requirements:

,

for cold rolled - GOST 19904-74.

Hot-rolled sheets with a thickness of more than 20 mm with a cut edge are produced by agreement between the manufacturer and the consumer.

High-precision hot-rolled sheets A are produced according to consumer demand.

(Changed edition, Amendment No. 2).

2.3. The flatness of the sheets must correspond to that indicated in the table. .

Table 1

Tensile strength, N/mm 2 )	Non-flatness of sheets per 1 m of length, mm
	hot rolled	cold rolled
Up to 690 (70) incl.	(PO, PV, PU, ​​PN)	According to GOST 19904-74 (PO, PV, PU, ​​PN)
St. 690 to 830 (St. 70 to 85) incl.
St. 830 (85)

Notes:

1. At the request of the consumer, hot-rolled sheets with a thickness of 4-5 mm are produced with especially high flatness (HF), with a thickness of 6 mm or more - with increased (IF) and improved (PU) flatness.

2. By agreement between the manufacturer and the consumer, sheets with a thickness of more than 20 mm are produced without straightening. In this case, the flatness should not exceed 30 mm per 1 m of length.

3. For sheets in a heat-treated state without etching, non-flatness is not standardized.

Examples of symbols

Cold-rolled steel, heat-treated, pickled, thick sheet, grade 12 X 18 H 10 T , M2a surface group, increased rolling accuracy, with cut edge, improved flatness, size 5 1250 2500 mm:

The same, hot rolled, heat treated, pickled, thick sheet, grade 20X13, M3b surface group, with uncut edge, normal flatness, size 40 400 3000 mm:

3. TECHNICAL REQUIREMENTS

3.1. Plate steel is produced in the following grades: 20X13, 09X16H4B, 12X13, 14 X 17 H 2, 08X13, 12X17, 08X17T, 15X25T, 07X16H6, 09X17H7Yu, 03 X 18H 11, 03Х17Н14М3, 08Х22Н6Т, 12 X 21 H 5 T , 08X21N6M2T, 20X23N13, 08X18G8N2T, 15X18N12S4TYu, 10X14G14N4T, 12X17G9AN4, 08X17N13M2T, 10X17N13M2T, 10 X 17 H 13 M 3 T , 08Х17Н15М3Т, 12Х18Н9, 17Х18Н9, 12Х18Н9Т, 04Х18Н10, 08Х18Н10, 08Х18Н10Т, 12Х18Н10Т, 08Х18Н12Т, 12Х18Н12Т, 08Х18Н12Б, 03Х 21Х21М4ГБ, 03Х22Н6М2, 03Х23Н6, 20Х23Н18, 12Х25Н16Г7AR, 06ХН28МДТ, 03ХН28МДТ, 15Х5М.

(Changed edition, Amendment No. 2, 3).

3.1a. Plate steel is manufactured in accordance with the requirements of this standard according to technological regulations approved in the prescribed manner.

3.2. Chemical composition of steel of all grades - according to , except for steel grade 15Х5М, the chemical composition of which must correspond to that specified in .

The chemical composition of grades 03Х23Н6 and 03Х22Н6М2 must correspond to table. A.

3.3. The sheets should be free of traces of shrinkage, delamination, foreign inclusions and bubbles.

3.4. The mechanical properties of heat-treated sheets must comply with the standards specified in table. .

3.5. The mechanical properties of the sheets, determined on control heat-treated samples, must comply with the standards specified in table. .

Table 1a

	Mass fraction of elements, %
	Carbon	Silicon	Sulfur	Phosphorus	Manganese	Chromium	Nickel	Molybdenum
	no more
03X23Н6	0,03	0,4	0,020	0,035	1,0-2,0	22,0-24,0	5,6-6,3
03Х22Н6М2	0,03	0,4	0,020	0,035	1,0-2,0	21,0-23,0	5,5-6,5	1,8-2,5

Notes:

1. In finished rolled products, deviations in mass fraction are allowed: silicon +0.4%, sulfur +0.005%, nickel ± 0.2%, chromium +0.5%.

2. In steel grade 03Х22Н6М2, an increase in the mass fraction of molybdenum of +0.2% is allowed.

3. The allowed mass fraction of residual titanium is no more than 0.05%, other residual elements - in accordance with GOST 5632-72.

(Changed edition, Amendment No. 2).

3.6. The mechanical properties of cold-worked and semi-hardened sheets are not standardized, but are required to be determined. Standards are established by agreement between the manufacturer and the consumer.

3.7. In terms of type and surface quality, the sheets must meet the requirements specified in table. .

3.8 Sheets made of steel grades 09Х17Н7У, 03Х18Н11, 03Х17Н14М3, 08Х22Н6Т, 08Х21Н6М2Т, 10Х14Г14Н4Т, 12Х17Г9АН4, 08Х17Н13М2Т, 10Х17Н13М2Т, 10Х17Н1 3M3T, 08Х17Н15М3Т, 12Х18Н9, 12Х18Н9Т, 04Х18Н10, 08Х18Н10, 08Х18Н10Т, 12Х18Н10Т, 08Х18Н12Т, 12Х18Н12Т, 08Х18Н12Б, 08Х18Г8Н2Т , 03Х21Н21М4ГБ, 03Х22Н6М2 ; 03Х23Н6, 06ХН28МДТ, 03ХН28МДТ should not be prone to intergranular corrosion.

Intergranular corrosion standards for steel grades 03Х22Н6М2 and 03Х23Н6 are not mandatory until 01/01/93. The definition is mandatory for the data set.

(Changed edition, Amendment No. 2, 3).

3.9. At the consumer's request, sheets are produced with the following standardization:

a) susceptibility to embrittlement of steel grade 12Х21Н5Т. The heat treatment regime and standards must correspond to those indicated in the table. .

b) surface roughness of cold-worked and semi-hardened steel;

c) alpha phases in austenitic steels;

d) susceptibility to intergranular corrosion for steel grades not specified in GOST 6032-84;

Table 2

	Heat treatment mode	Temporary resistance s IN, N/mm 2 (kgf/mm 2)	Yield strength s T, N/mm 2 (kgf/mm 2)	Relative extension 5 , %	Impact strength KS U , J/cm 2 (kgf m/cm 2)
		no less
15Х5М	Annealing at 840-870° , air cooling	470 (48)	235 (24)
20X13	Normalization or hardening at 1000-1050 ° ° C, oven or air cooling	510 (52)	375 (38)
	Annealing according to manufacturer's conditions	No more than 750 (76)
14X17112*	Annealing or tempering at 650-700 ° WITH	By agreement between the manufacturer and the consumer
09X16N4B	Annealing according to manufacturer's conditions	no more than 1030 (105)
12X13	Quenching at 960-1020 ° C, air cooling, tempering at 680-780 ° C	490 (50)	345 (35)
	Annealing according to manufacturer's conditions	No more than 650 (66)	250 (25)
08X13	Quenching at 960-1020 ° C, cooling in water or air, tempering at 680-780 ° With, air cooling or oven	420 (43)	295 (30)
	Annealing according to manufacturer's conditions	No more than 650 (66)	250 (25)
12X17*	Annealing or tempering at 760-780 ° C, air or oven cooling	440 (45)
08X17T*	Annealing or tempering at 760-780 ° C, air cooling	440 (45)
15Х2Т*	Annealing or tempering at 740-780 ° C, cooling in water	440 (45)			20 (2)
08Х22Н6Т	Quenching at 1000-1050 ° C, cooling in water	590 (60)	345 (35)		59 (6)
03Х23Н6	Hardening 1030-1050 ° C, cooling in water	590 (60)	345 (35)
12Х21Н5Т*	Quenching at 950-1050 °	690 (70)	390 (40)
08Х21Н6М2Т	Quenching at 1050± 25 ° C, cooling in water	590 (60)	345 (35)		59 (6)
03Х22Н6М2	Quenching at 1030-1050 ° C, cooling in water	590 (60)	345 (35)
20Х23Н13*	Quenching at 1030-1120 ° C, cooling in water	570 (58)
10Х14Г14Н4Т	Quenching at 1050-1080 ° C, cooling in water or air	590 (60)	245 (25)
12X17G9AN4*	Quenching at 1030-1100 ° C, cooling in water	690 (70)	345 (35)
10Х17Н13М2Т	Quenching at 1030-1080 ° C, cooling in water or air	530 (54)	235 (24)
08Х17Н13М2Т	Quenching at 1030-1080 ° C, cooling in water or air	510 (52)	196 (20)
10Х17Н13М3Т	Quenching at 1030-1080 ° C, cooling in water or air	530 (54)	235 (24)
08Х17Н15М3Т*	Quenching at 1030-1080 ° C, cooling in water or air	510 (52)	196 (20)
17Х18Н9	Quenching at 1080-1120 ° C, cooling in water	590 (60)	265 (27)
12Х18Н9	Quenching at 1050-1120 °	530 (54)	215 (22)
12Х18Н9Т	Quenching at 1030-1080 ° C, cooling in water or air	530 (54)	215 (22)
08X18Н10	Quenching at 1050-1100 ° C, cooling in water or air	510 (52)	205 (21)
04X18Н10	Quenching at 1050-1100 ° C, cooling in water or air	490 (50)	175 (18)
12Х18Н10Т	Hardening at 1000-1080 ° C, cooling in water or air	530 (54)	235 (24)		-
08Х18Н10Т	Hardening at 1000-1080 ° C, cooling in water or air	510 (52)	205 (21)
12X18Н12Т	Quenching at 1030-1080 ° C, cooling in water or air	530 (54)	235 (24)
08Х18Н12Т	Quenching at 1030-1080 ° C, cooling in water or air	510 (52)	205 (21)
08Х18Н12Б	Quenching at 1000-1100 ° C, cooling in water or air	510 (52)	205 (21)
20Х23Н18	Quenching at 1030-1130 ° C, cooling in water	540 (55)	265 (27)
03Х28МДТ*	Hardening at 1040-1080 ° C, cooling in water	540 (55)	215 (22)
12X25N16G7AR*	Quenching at 1050-1150 ° C, cooling in water or air	740 (75)	390 (40)
15Х18Н12С4ТУ*	Quenching at 1020-1050 ° C, cooling in water or air	690-930 (70-95)	345 (35)
07X16Н6	Normalization at (1040± 10) ° C, air cooling	no more than 1180 (120)	no more than 390 (40)
03Х21Н21М4ГБ*	Quenching at 1060-1120 ° C, cooling in water or under a water shower	590 (60)	295 (30)
08Х18Г8Н2Т	Quenching at 980-1020 ° C, cooling in water or under a water shower	590 (60)	345 (35)		59 (6)
09 X17 H7YU	Quenching at 1030-1070 ° C, air cooling, double first tempering at 740-760 ° C, cooling in air or water, second tempering at 580-680 ° C, air cooling	830 (85)	no more than 735 (75)	12	49 (5)
06ХН28МДТ	Hardening 950-1080 ° C, cooling in water	540 (55)	215 (22)	35	-
03Х18Н11	Quenching at 1080-1100 ° C, cooling in water or air	490 (50)	196 (20)	40	-
03Х17Н14М3	Quenching at 1080-1100 ° C, cooling in water or air	490 (50)	196 (20)	40	-

* For sheets with a thickness of over 25 mm, mechanical properties are not standardized; determination is required.

Note. Annealing of steel sheets of grades 20X13, 12X13, 08X13 is carried out at the request of the consumer. The standards are not mandatory until 01/01/94. The definition is required for the data set.

(Changed edition, Amendment No. 2, 3).

Table 3

	Sample thermal treatment mode	Temporary resistance s IN, N/mm 2 (kgf/mm 2)	Yield strength s T, N/mm 2 (kgf/mm 2)	Relative extension 5 , %	Impact strength KS U , J/cm 2 (kgf m/cm 2)
		no less
14Х17Н2	Quenching at 960-1050 ° C, cooling in water or air, tempering at 275-350 ° C, air cooling	1080 (110)	885 (90)	10	-
09X16N4B	Quenching at 950-980 °C, cooling in air, tempering at 300-350 ° C, air cooling	1230 (125)	980 (100)	8	-
07Х16Н6	Normalization at (975± 10) ° C, cold treatment at - 70 ° From 2 o'clock, holiday at (425± 10) ° From 1 hour, air cooling	1080 (110)	835 (85)	10	-

Note. By agreement between the manufacturer and the consumer, it is allowed to change the heat treatment mode with a corresponding change in the standards of mechanical properties.

(Changed edition, Amendment No. 2).

Table 4

	Group symbol	Material condition	Surface characteristics	Name of allowed surface defects	Maximum depth of defects
1	H1 PN1	Hard-worked (N) and semi-hardened (PN)	Shiny, without blistering bubbles, rolled out bubbles, captivity, ripples, over-etching, with a slight difference in shades	Scratches, nicks, prints, marks, rolled prints
2	M2a		Silver-matte or shiny, without blistering bubbles, rolled out bubbles, captivity, cracks, scale and over-etching	Ripple, scratches, nicks, prints, marks, rolled out prints	Depth that does not take the sheet beyond the maximum deviations
	M2b			Same with shells
3	M3a	a) Cold rolled, heat treated or annealed			1/2 the sum of maximum deviations in thickness
	M3b	b) Hot rolled, heat treated, pickled or after bright annealing		Same with shells
4	M4a	a) Cold rolled, heat treated, pickled or after bright annealing		Ripple, scratches, prints, nicks, scratches, rolled out prints	Sum of maximum deviations in thickness
	M4b	b) Hot rolled, heat treated, pickled or after bright annealing		Same with shells
5	M5a	a) Hot rolled, heat treated, pickled or after bright annealing	Matte with a gray tint or shiny, without bubbles or swelling,	Ripple, scratches, prints, nicks, scratches, small rolled films, rolled prints	Sum limit thickness deviations
	M5b	b) Hot rolled, heat treated, pickled or after bright annealing	rolled out bubbles, cracks, scale and over-etching	Same with shells
	M5v	c) Cold rolled, heat treated	Dark	Ripple, scratches, prints, nicks, scratches, small rolling films, rolled prints, scale
	M5g	d) Hot rolled, heat treated		Ripple, scratches, prints, nicks, scratches, small rolled films, cavities, rolled prints, scale
	5d	e) Hot rolled, unheated and unetched		Same

Notes:

1. Requirements for the quality of the surface of heat-treated steel in terms of the number and nature of defects can be specified by agreement of the parties using standards.

2. Local gentle cleaning of the surface is allowed, and the depth of cleaning should not exceed the norms for the depth of permissible defects. Arson from clean-up operations is not permitted.

3. At the consumer’s request, sheets are produced without cleaning or cutting out unacceptable defects.

4. Tempering colors and various shades from pickling on cold-rolled and hot-rolled heat-treated sheets, pickled or after bright annealing, are not a defective sign.

5. Welding of defects on sheets is allowed by agreement with the consumer.

(Changed edition, Amendment No. 2).

Impact strength not specified;

f) grain size;

g) mechanical properties of hot-rolled sheets supplied without heat treatment and pickling;

h) mechanical properties at elevated temperatures;

i) steel contamination with non-metallic inclusions;

.

Note. Norms by subparagraphs b, V, d, e, and, h, And, To, as well as control methods by subparagraphs V, G are established by agreement between the manufacturer and the consumer.

Table 5

Heat treatment mode	Sheet thickness, mm	Sample type	Impact strength KS U , J/cm 2 (kgf m/cm 2), no less
Heating up to 550 ° C, holding time 1 hour, cooling with oven at speed 100 ° S/h up to 300 ° C, then air cooling	To 10	Type VIII according to GOST 6996-60	39 (4,0) 29 (3,0)
	St. 10

3.10. At the consumer's request, sheets are produced:

a) checking the susceptibility to intergranular corrosion of steel grades 08Х17Т, 15Х25Т and 07Х16Н6;

b) checking internal defects using non-destructive methods. Standards are established by agreement between the manufacturer and the consumer;

c) without mechanical or other tests, provided that the standards established in this standard are met;

d) with control of the hardness of heat-treated sheets;

e) with bending test.

(Changed edition, Amendment No. 2, 3).

4. ACCEPTANCE RULES

4.1. Sheet steel is accepted in batches. The batch must consist of metal from one heat, one state of material, one thickness, and for heat-treated steel - one heat treatment mode. Sheets that differ in thickness by no more than 40% can be combined into one batch - for sheets with a thickness of 4 to 12 mm, and no more than 5 mm for sheets with a thickness of over 12 mm.

By agreement between the manufacturer and the consumer, batches consisting of several heats of the same brand or one heat of sheets of different thickness are allowed.

(Changed edition, Amendment No. 3).

4.1.1. Each batch must be accompanied by a quality document in accordance with GOST 7566-81 with the additions:

test results of the mechanical properties of cold-worked and semi-hardened sheets and sheets with a thickness of over 25 mm;

test results of steel sheets of grades 03Х22Н6М2 and 03Х23Н6 for susceptibility to intergranular corrosion;

results of checking sheets for internal defects;

hardness control results.

(Introduced additionally, Amendment No. 2).

4.2. All sheets of the batch are subjected to control of surface, non-flatness and dimensions.

The manufacturer is allowed to control the flatness and dimensions of the sheets selectively, but not less than on one sheet of each thickness in the batch.

4.3. To check the quality of sheets, the following are selected:

for tensile testing, determination of impact strength, grain size and surface roughness - one sheet per batch;

to determine the susceptibility to intergranular corrosion - according to GOST 6032-84;

to determine the contamination of steel with non-metallic inclusions - according to GOST 1778-70;

to check the chemical composition - according to GOST 7565-81.

To check the mechanical properties, susceptibility to intergranular corrosion, contamination with non-metallic inclusions and grain size, it is allowed to select the thickest sheet from a batch consisting of sheets of different thicknesses and the same heat treatment mode.

4.4. If unsatisfactory test results are obtained for at least one of the indicators, repeated tests are carried out on a sample selected in accordance with GOST 7566-81.

5. TEST METHODS

5.1. Sampling to determine the chemical composition of steel - according to GOST 7565-81. The chemical composition is determined according to GOST 20560-81, GOST 12344-88, GOST 12345-88, GOST 12346-78, GOST 12347-77, GOST 12348-78, GOST 12349-83, GOST 12350-78, GOST 12351-81, GOST 12352-81, GOST 12353-78, GOST 12354-81, GOST 12355-78, GOST 12356-81, GOST 12357-84, GOST 12358-82, GOST 12359-81, GOST 12360-82, GOST 12361-82, GOST 12362-79, GOST 12363-79, GOST 12364-84, GOST 12365-84 or other methods that ensure the required analysis accuracy.

5.2. The quality of the surface is checked without the use of magnifying devices.

5.3. Sheet thickness and non-flatness are measured using and GOST 19904-74. The dimensions and shape of the sheets are checked with a measuring tool that ensures the necessary measurement accuracy.

5.4. Selection and preparation of samples for mechanical tests are carried out according to GOST 7564-73 across the rolling direction, and for steel grade 09Х17Н7У - along the rolling direction.

From each control sheet the following is selected:

for tensile testing and determination of surface roughness using one sample;

to determine impact strength and grain size - two samples each.

5.5. Tensile testing at room temperature is carried out according to , at elevated temperatures - according to on short samples.

(Changed edition, Amendment No. 2).

5.6. Impact strength is determined only for sheets with a thickness of 11 mm or more according to on type 1 samples.

5.7. Surface roughness is determined in accordance with the requirements or comparison with working samples.

(Changed edition, Amendment No. 2).

5.10. Steel testing for susceptibility to intergranular corrosion is carried out according to GOST 6032-75.

Sheets without heat treatment are not tested for susceptibility to intergranular corrosion.

If unsatisfactory test results are obtained using the AMU and VU methods, by agreement between the manufacturer and the consumer, it is allowed to carry out repeated tests according to the AM and B methods, respectively;

Testing of steel grades 03Х23Н6 and 03Х22Н6М2 for susceptibility to intergranular corrosion is carried out according to the DU GOST 6032-84 method.

Sheets made of steel grade 03Х22Н6М2 are controlled in a hardened state, and sheets of steel grade 03Х23Н6 are controlled in a state of hardening and subsequent tempering at 550 ° C for 1 hour.

5.11. The absence of internal defects in the sheets specified in paragraph., is provided by technology for the production of steel and sheets.

Inspection is carried out visually at the edges of the sheets.

Ultrasonic inspection of internal defects is carried out at the request of the consumer according to regulatory and technical documentation.

(Changed edition, Amendment No. 2).

5.12. To test mechanical properties and the absence of a tendency to intergranular corrosion, it is allowed to use hundredstatistical control methods approved in accordance with the established procedure.

5.13. Hardness determination is carried out according to on workpieces for making tensile samples.

5.14. The bending test is carried out according to .

5.13; 5.14. (Introduced additionally, Amendment No. 2).

6. PACKAGING, LABELING, TRANSPORTATION AND STORAGE

6.1. Packaging, labeling, transportation and storage - in accordance with GOST 7566-81.

(Changed edition, Amendment No. 2).

6.2. (Deleted, Amendment No. 2).

6.3. When packing sheets into bundles, each bundle must consist of sheets from one batch. It is allowed to pack sheets of different batches made from the same melt into one pack. In this case, the batches must be separated by spacers. It is allowed to tie packs of hot-rolled unetched sheets with transverse straps in an amount equal to the sum of the longitudinal and transverse straps provided for by GOST 7566-81. In this case, there should be no displacement of sheets into bundles during transportation. Instead of marking the top sheet of the pack, it is allowed to apply markings to a metal card with a size of at least 200 290 mm, firmly attached in at least two places to the packing tape on the top of the pack.

APPLICATION. (Deleted, Amendment No. 1).

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the USSR Ministry of Ferrous Metallurgy

DEVELOPERS

I. N. Golikov, Dr. Tech. sciences;R. I. Trubetskova; E. G. Feldgandler; S. S. Gratsianova; O. I. Putimtseva

2. APPROVED AND ENTERED INTO EFFECT by Resolution of the State Committee of Standards of the Council of Ministers of the USSR dated July 21, 1977 No. 1786

3. The standard fully complies with ST SEV 6434-88

4. REFERENCE REGULATIVE AND TECHNICAL DOCUMENTS

GOST 7564-73

GOST 7565-81

GOST 7566-81

,

GOST 9454-78

GOST 9651-84

GOST 12344-88

GOST 12345-88

GOST 12346-78

GOST 12347-77

GOST 12348-78

GOST 12349-83

GOST 12350-78

GOST 12351-81

GOST 12352-81

GOST 12353-78

GOST 12354-81

GOST 12355-78

GOST 12356-81

GOST 12357-84

GOST 12358-82

GOST 12359-81

GOST 12360-82

GOST 12361-82

GOST 12362-79

GOST 12363-79

GOST 12364-84

GOST 12365-84

GOST 14019-80

GOST 19300-86

GOST 19903-74

,

GOST 19904-74

,

GOST 20072-74

GOST 20560-81

5. Validity period extended until 01/01/94 (Resolution of the USSR State Standard of 06/29/88 No. 2556)

6. Reissue (October 1990) with Amendments 1, 2, 3, approved in November 1987, June 1988, October 1989 (IUS 2-88, 11-88, 2-90)

CONTENT

Directory of GOSTs, TUs, standards, norms and rules. SNiP, SanPiN, certification, technical specifications

STATE STANDARD OF THE USSR UNION

THICK STEEL
CORROSION-RESISTANT,
HEAT-RESISTANT AND HEAT-RESISTANT

TECHNICAL CONDITIONS

GOST 7350-77
(ST SEV 6434-88)

STATE COMMITTEE OF THE USSR
ON PRODUCT QUALITY MANAGEMENT AND STANDARDS

Moscow

STATE STANDARD OF THE USSR UNION

Validity from 01.01.79

until 01/01/94

This standard applies to plate, hot-rolled and cold-rolled corrosion-resistant, heat-resistant and heat-resistant steel manufactured in sheets.

The standard fully complies with ST SEV 6434-88.

1. CLASSIFICATION

1.1. Thick-sheet corrosion-resistant, heat-resistant and heat-resistant steel is divided into:

according to the condition of the material and surface quality into groups:

cold-rolled hard-worked - H 1,

cold-rolled semi-hardened - PN1,

cold rolled, heat treated, pickled or after bright annealing - M2a, M3a, M4a, M5a,

cold-rolled heat-treated - M5v,

hot rolled, heat treated,

etched or after bright annealing - M2b, M3b, M4b, M5b,

hot-rolled, heat-treated, unetched - M5g,

hot rolled without heat treatment and unetched - M5d;

according to rolling accuracy:

increased accuracy - A,

normal accuracy - B;

according to the type of edges:

edged - O;

unedged - BUT;

for non-flatness of sheets with a temporary resistance of 690 N/mm 2 (70 kgf/mm 2) or less by:

especially high flatness - PO; high flatness - PV,

improved flatness - PU,

normal flatness - PN.

1.2. It is allowed to produce thick sheet steel with a rolling accuracy higher than that specified in the order.

2. ASSORTMENT

2.1. Hot-rolled plate steel is made with a thickness of 4 to 50 mm, cold-rolled steel with a thickness of 4 to 5 mm.

2.2. The shape, dimensions and maximum deviations in dimensions of thick sheet steel must meet the requirements:

for hot rolled - GOST 19903-74 ,

for cold rolled - GOST 19904-74.

Hot-rolled sheets with a thickness of more than 20 mm with a cut edge are produced by agreement between the manufacturer and the consumer.

High-precision hot-rolled sheets A are produced according to consumer demand.

(Changed edition, Amendment No. 2).

2.3. The flatness of the sheets must correspond to that indicated in the table..

Table 1

Tensile strength, N/mm 2 (kgf/mm 2 )	Non-flatness of sheets per 1 m length, mm
	hot rolled	cold rolled
Up to 690 (70) incl.	By GOST 19903-74 (PO, PV, PU, ​​PN)	According to GOST 19904-74 (PO, PV, PU, ​​PN)
St. 690 to 830 (St. 70 to 85) incl.
St. 830 (85)		By agreement between the manufacturer and the consumer

Notes:

1. At the request of the consumer, hot-rolled sheets with a thickness of 4-5 mm are produced with especially high flatness (HF), with a thickness of 6 mm or more - with increased (IF) and improved (PU) flatness.

2. By agreement between the manufacturer and the consumer, sheets with a thickness of more than 20 mm are produced without straightening. In this case, the non-flatness should not exceed 30 mm per 1 m of length.

3. For sheets in a heat-treated state without etching, non-flatness is not standardized.

Examples of symbols

Cold-rolled steel, heat-treated, pickled, thick sheet, grade 12 X 18 H 10 T , M2a surface group, increased rolling accuracy, with cut edge, improved flatness, size 5´ 1250 ´ 2500 mm:

The same, hot rolled, heat treated, pickled, thick sheet, grade 20X13, M3b surface group, with uncut edge, normal flatness, size 40´ 400 ´ 3000 mm:

3. TECHNICAL REQUIREMENTS

3.1. Plate steel is produced in the following grades: 20X13, 09Х16Н4Б, 12X13, 14 X 17 H 2, 08X13, 12X17, 08X17T, 15X25T, 07X16H6, 09X17H7Yu, 03 X 18H 11, 03Х17Н14М3, 08Х22Н6Т, 12 X 21 H 5 T , 08X21N6M2T, 20X23N13, 08X18G8N2T, 15X18N12S4TYu, 10X14G14N4T, 12X17G9AN4, 08X17N13M2T, 10X17N13M2T, 10 X 17 H 13 M 3 T , 08Х17Н15М3Т, 12Х18Н9, 17Х18Н9, 12Х18Н9Т, 04Х18Н10, 08Х18Н10, 08Х18Н10Т, 12Х18Н10Т, 08Х18Н12Т, 12Х18Н12Т, 08Х18Н12Б, 03Х 21Х21М4ГБ, 03Х22Н6М2, 03Х23Н6, 20Х23Н18, 12Х25Н16Г7AR, 06ХН28МДТ, 03ХН28МДТ, 15Х5М.

(Changed edition, Amendment No. 2, 3).

3.1a. Plate steel is manufactured in accordance with the requirements of this standard according to technological regulations approved in the prescribed manner.

3.2. Chemical composition of steel of all grades - according to GOST 5632-72 , except for steel grade 15Х5М, the chemical composition of which must correspond to that specified inGOST 20072-74.

The chemical composition of grades 03Х23Н6 and 03Х22Н6М2 must correspond to table. A.

3.3. The sheets should be free of traces of shrinkage, delamination, foreign inclusions and bubbles.

3.4. The mechanical properties of heat-treated sheets must comply with the standards specified in table. .

3.5. The mechanical properties of the sheets, determined on control heat-treated samples, must comply with the standards specified in table. .

Table 1a

steel grade	Mass fraction of elements, %
	Carbon	Silicon	Sulfur	Phosphorus	Manganese	Chromium	Nickel	Molybdenum
	no more
03X23Н6	0,03		0,020	0,035	1,0-2,0	22,0-24,0	5,6-6,3
03Х22Н6М2	0,03		0,020	0,035	1,0-2,0	21,0-23,0	5,5-6,5	1,8-2,5

Notes:

1. In finished rolled products, deviations in mass fraction are allowed: silicon +0.4%, sulfur +0.005%, nickel± 0.2%, chromium +0.5%.

2. In steel grade 03Х22Н6М2, an increase in the mass fraction of molybdenum of +0.2% is allowed.

3. Allowed mass fraction of residual titanium is no more than 0.05%, other residual elements - according to GOST 5632-72.

(Changed edition, Amendment No. 2).

3.6. The mechanical properties of cold-worked and semi-hardened sheets are not standardized, but are required to be determined. Standards are established by agreement between the manufacturer and the consumer.

3.7. In terms of type and surface quality, the sheets must meet the requirements specified in table. .

3.8 Sheets made of steel grades 09Х17Н7У, 03Х18Н11, 03Х17Н14М3, 08Х22Н6Т, 08Х21Н6М2Т, 10Х14Г14Н4Т, 12Х17Г9АН4, 08Х17Н13М2Т, 10Х17Н13М2Т, 10Х17Н1 3M3T, 08Х17Н15М3Т, 12Х18Н9, 12Х18Н9Т, 04Х18Н10, 08Х18Н10, 08Х18Н10Т, 12Х18Н10Т, 08Х18Н12Т, 12Х18Н12Т, 08Х18Н12Б, 08Х18Г8Н2Т , 03Х21Н21М4ГБ, 03Х22Н6М2 ; 03Х23Н6, 06ХН28МДТ, 03ХН28МДТ should not be prone to intergranular corrosion.

Intergranular corrosion standards for steel grades 03Х22Н6М2 and 03Х23Н6 are not mandatory until 01/01/93. The definition is mandatory for the data set.

(Changed edition, Amendment No. 2, 3).

3.9. At the consumer's request, sheets are produced with the following standardization:

a) susceptibility to embrittlement of steel grade 12Х21Н5Т. The heat treatment regime and standards must correspond to those indicated in the table. .

b) surface roughness of cold-worked and semi-hardened steel;

c) alpha phases in austenitic steels;

d) susceptibility to intergranular corrosion for steel grades not specified in GOST 6032-84;

Table 2

steel grade	Heat treatment mode	Temporary resistances V, N/mm 2 (kgf/mm 2)	Yield strengths t, N/mm 2 (kgf/mm 2)	Relative extensionδ5,%	Impact strength KSU, J/cm 2 (kgf m/cm 2)
		no less
15Х5М	Annealing at 840-870 ° , air cooling	470 (48)	235 (24)
20X13	Normalization or hardening at 1000-1050° C, air cooling, tempering at 680-780° C, oven or air cooling	510 (52)	375 (38)
	Annealing according to manufacturer's conditions	No more than 750 (76)
14X17112*	Annealing or tempering at 650-700° WITH	By agreement between the manufacturer and the consumer
09X16N4B	Annealing according to manufacturer's conditions	no more than 1030 (105)
12X13	Quenching at 960-1020° C, air cooling, tempering at 680-780° C	490 (50)	345 (35)
	Annealing according to manufacturer's conditions	No more than 650 (66)	250 (25)
08X13	Quenching at 960-1020° C, cooling in water or air, tempering at 680-780° With, air cooling or oven	420 (43)	295 (30)
	Annealing according to manufacturer's conditions	No more than 650 (66)	250 (25)
12X17*	Annealing or tempering at 760-780° C , air or oven cooling	440 (45)
08X17T*	Annealing or tempering at 760-780° C, air cooling	440 (45)
15Х2Т*	Annealing or tempering at 740-780° C, cooling in water	440 (45)			20 (2)
08Х22Н6Т	Quenching at 1000-1050° C, cooling in water	590 (60)	345 (35)		59 (6)
03Х23Н6	Hardening 1030-1050 ° C, cooling in water	590 (60)	345 (35)
12Х21Н5Т*	Quenching at 950-1050°	690 (70)	390 (40)
08Х21Н6М2Т	Quenching at 1050 ± 25 ° C, cooling in water	590 (60)	345 (35)		59 (6)
03Х22Н6М2	Quenching at 1030-1050° C, cooling in water	590 (60)	345 (35)
20Х23Н13*	Quenching at 1030-1120° C, cooling in water	570 (58)
10Х14Г14Н4Т	Quenching at 1050-1080° C, cooling in water or air	590 (60)	245 (25)
12X17G9AN4*	Quenching at 1030-1100° C, cooling in water	690 (70)	345 (35)
10Х17Н13М2Т	Quenching at 1030-1080° C, cooling in water or air	530 (54)	235 (24)
08Х17Н13М2Т	Quenching at 1030-1080° C, cooling in water or air	510 (52)	196 (20)
10Х17Н13М3Т	Quenching at 1030-1080° C, cooling in water or air	530 (54)	235 (24)
08Х17Н15М3Т*	Quenching at 1030-1080° C, cooling in water or air	510 (52)	196 (20)
17Х18Н9	Quenching at 1080-1120° C, cooling in water	590 (60)	265 (27)
12Х18Н9	Quenching at 1050-1120°	530 (54)	215 (22)
12Х18Н9Т	Quenching at 1030-1080° C, cooling in water or air	530 (54)	215 (22)
08X18Н10	Quenching at 1050-1100° C, cooling in water or air	510 (52)	205 (21)
04X18Н10	Quenching at 1050-1100° C, cooling in water or air	490 (50)	175 (18)
12Х18Н10Т	Hardening at 1000-1080° C, cooling in water or air	530 (54)	235 (24)		-
08Х18Н10Т	Hardening at 1000-1080° C, cooling in water or air	510 (52)	205 (21)
12X18Н12Т	Quenching at 1030-1080° C, cooling in water or air	530 (54)	235 (24)
08Х18Н12Т	Quenching at 1030-1080° C, cooling in water or air	510 (52)	205 (21)
08Х18Н12Б	Quenching at 1000-1100° C, cooling in water or air	510 (52)	205 (21)
20Х23Н18	Quenching at 1030-1130° C, cooling in water	540 (55)	265 (27)
03Х28МДТ*	Hardening at 1040-1080° C, cooling in water	540 (55)	215 (22)
12X25N16G7AR*	Quenching at 1050-1150° C, cooling in water or air	740 (75)	390 (40)
15Х18Н12С4ТУ*	Quenching at 1020-1050° C, cooling in water or air	690-930 (70-95)	345 (35)
07X16Н6	Normalization at (1040± 10) ° C, air cooling	no more than 1180 (120)	no more than 390 (40)
03Х21Н21М4ГБ*	Quenching at 1060-1120° C, cooling in water or under a water shower	590 (60)	295 (30)
08Х18Г8Н2Т	Quenching at 980-1020° C, cooling in water or under a water shower	590 (60)	345 (35)		59 (6)
09 X 17 H 7YU	Quenching at 1030-1070° C, air cooling, double first tempering at 740-760° C, cooling in air or water, second tempering at 580-680° C, air cooling	830 (85)	no more than 735 (75)		49 (5)
06ХН28МДТ	Hardening 950-1080 ° C, cooling in water	540 (55)	215 (22)
03Х18Н11	Quenching at 1080-1100° C, cooling in water or air	490 (50)	196 (20)
03Х17Н14М3	Quenching at 1080-1100° C, cooling in water or air	490 (50)	196 (20)	40	-

* For sheets with a thickness of over 25 mm, mechanical properties are not standardized; determination is required.

Note. Annealing of steel sheets of grades 20X13, 12X13, 08X13 is carried out at the request of the consumer. The standards are not mandatory until 01/01/94. The definition is required for the data set.

(Changed edition, Amendment No. 2, 3).

Table 3

steel grade	Sample thermal treatment mode	Temporary resistances IN , N/mm 2 (kgf/mm 2)	Yield strengths T , N/mm 2 (kgf/mm 2)	Relative extensionδ 5 , %	Impact strength KSU , J/cm 2 (kgf m/cm 2)
		no less
14Х17Н2	Quenching at 960-1050° C, cooling in water or air, tempering at 275-350° C, air cooling	1080 (110)	885 (90)	10	-
09X16N4B	Quenching at 950-980 °C, cooling in air, tempering at 300-350° C, air cooling	1230 (125)	980 (100)	8	-
07Х16Н6	Normalization at (975± 10) ° C, cold treatment at - 70° From 2 o'clock, holiday at (425± 10) ° From 1 hour, air cooling	1080 (110)	835 (85)	10	-

Note. By agreement between the manufacturer and the consumer, it is allowed to change the heat treatment mode with a corresponding change in the standards of mechanical properties.

(Changed edition, Amendment No. 2).

Table 4

Surface group	Group symbol	Material condition	Surface characteristics	Name of allowed surface defects	Maximum depth of defects
1	H1 PN1	Hard-worked (N) and semi-hardened (PN)	Shiny, without blistering bubbles, rolled out bubbles, captivity, ripples, over-etching, with a slight difference in shades	Scratches, nicks, prints, marks, rolled prints
2	M2a		Silver-matte or shiny, without blistering bubbles, rolled out bubbles, captivity, cracks, scale and over-etching	Ripple, scratches, nicks, prints, marks, rolled out prints	Depth that does not take the sheet beyond the maximum deviations
	M2b			Same with shells
3	M3a	a) Cold rolled, heat treated or annealed			1/2 the sum of maximum deviations in thickness
	M3b	b) Hot rolled, heat treated, pickled or after bright annealing		Same with shells
4	M4a	a) Cold rolled, heat treated, pickled or after bright annealing		Ripple, scratches, prints, nicks, scratches, rolled out prints	Sum of maximum deviations in thickness
	M4b	b) Hot rolled, heat treated, pickled or after bright annealing		Same with shells
5	M5a	a) Hot rolled, heat treated, pickled or after bright annealing	Matte with a gray tint or shiny, without bubbles or swelling,	Ripple, scratches, prints, nicks, scratches, small rolled films, rolled prints	Sumlimitthickness deviations
	M5b	b) Hot rolled, heat treated, pickled or after bright annealing	rolled out bubbles, cracks, scale and over-etching	Same with shells
	M5v	c) Cold rolled, heat treated	Dark	Ripple, scratches, prints, nicks, scratches, small rolling films, rolled prints, scale
	M5g	d) Hot rolled, heat treated		Ripple, scratches, prints, nicks, scratches, small rolled films, cavities, rolled prints, scale
	5d	e) Hot rolled, unheated and unetched		Same

Notes:

1. Requirements for the quality of the surface of heat-treated steel in terms of the number and nature of defects can be specified by agreement of the parties using standards.

2. Local gentle cleaning of the surface is allowed, and the depth of cleaning should not exceed the norms for the depth of permissible defects. Arson from clean-up operations is not permitted.

3. At the consumer’s request, sheets are produced without cleaning or cutting out unacceptable defects.

4. Tempering colors and various shades from pickling on cold-rolled and hot-rolled heat-treated sheets, pickled or after bright annealing, are not a defective sign.

5. Welding of defects on sheets is allowed by agreement with the consumer.

(Changed edition, Amendment No. 2).

e) impact strength of steels, for which in table. Impact strength not specified;

f) grain size;

g) mechanical properties of hot-rolled sheets supplied without heat treatment and pickling;

h) mechanical properties at elevated temperatures;

i) steel contamination with non-metallic inclusions;

j) mechanical properties different from those indicated in table. .

Note. Norms by subparagraphs b, V, d, e, and, h, And, To, as well as control methods by subparagraphs V, G are established by agreement between the manufacturer and the consumer.

Table 5

Heat treatment mode	Sheet thickness, mm	Sample type	Impact strength KSU , J/cm 2 (kgf m/cm 2),no less
Heating up to 550° C, holding time 1 hour, cooling with oven at speed 100° S/h up to 300° C, then air cooling	To 10	TypeVIIIaccording to GOST 6996-60	39 (4,0) 29 (3,0)
	St. 10	TypeIByGOST 9454-78

3.10. At the consumer's request, sheets are produced:

a) checking the susceptibility to intergranular corrosion of steel grades 08Х17Т, 15Х25Т and 07Х16Н6;

b) checking internal defects using non-destructive methods. Standards are established by agreement between the manufacturer and the consumer;

c) without mechanical or other tests, provided that the standards established in this standard are met;

d) with control of the hardness of heat-treated sheets;

e) with bending test.

(Changed edition, Amendment No. 2, 3).

4. ACCEPTANCE RULES

4.1. Sheet steel is accepted in batches. The batch must consist of metal from one heat, one state of material, one thickness, and for heat-treated steel - one heat treatment mode. Sheets that differ in thickness by no more than 40% can be combined into one batch - for sheets with a thickness of 4 to 12 mm, and no more than 5 mm for sheets with a thickness of over 12 mm.

By agreement between the manufacturer and the consumer, batches consisting of several heats of the same brand or one heat of sheets of different thickness are allowed.

(Changed edition, Amendment No. 3).

4.1.1. Each batch must be accompanied by a quality document in accordance with GOST 7566-81 with the additions:

test results of the mechanical properties of cold-worked and semi-hardened sheets and sheets with a thickness of over 25 mm;

test results of steel sheets of grades 03Х22Н6М2 and 03Х23Н6 for susceptibility to intergranular corrosion;

results of checking sheets for internal defects;

hardness control results.

(Introduced additionally, Amendment No. 2).

4.2. All sheets of the batch are subjected to control of surface, non-flatness and dimensions.

The manufacturer is allowed to control the flatness and dimensions of the sheets selectively, but not less than on one sheet of each thickness in the batch.

4.3. To check the quality of sheets, the following are selected:

for tensile testing, determination of impact strength, grain size and surface roughness - one sheet per batch;

to determine the susceptibility to intergranular corrosion - according to GOST 6032-84;

to determine the contamination of steel with non-metallic inclusions - according to GOST 1778-70;

to check the chemical composition - according to GOST 7565-81.

To check the mechanical properties, susceptibility to intergranular corrosion, contamination with non-metallic inclusions and grain size, it is allowed to select the thickest sheet from a batch consisting of sheets of different thicknesses and the same heat treatment mode.

GOST 7350-77

INTERSTATE STANDARD

AND HEAT RESISTANT

TECHNICAL CONDITIONS

Official publication

Standardinform

INTERSTATE STANDARD

THICK STEEL, CORROSION-RESISTANT, HEAT-RESISTANT

AND HEAT-RESISTANT GOST

Specifications

Plate steel, corrosion-resistant, heat-resistant and high-temperature.

MKC 77.140.20 OKP 09 8500, 09 8600

Date of introduction 01/01/79

This standard applies to plate, hot-rolled and cold-rolled corrosion-resistant, heat-resistant and heat-resistant steel (hereinafter referred to as steel), manufactured in sheets.

1. CLASSIFICATION

1.1. Steel is divided into:

According to the condition of the material and the quality of the surface into groups: cold-rolled hard-worked - H1, cold-rolled semi-hardened - PN1,

cold-rolled, heat-treated, pickled or after bright annealing - M2a, MZa, M4a, M5a,

cold-rolled heat-treated - M5v, hot-rolled heat-treated,

pickled or after bright annealing - M2b, MZb, M4b, M5b, hot-rolled, heat-treated unetched - M5g, hot-rolled without heat treatment and unetched - 5d;

According to rolling accuracy: increased accuracy - A, normal accuracy - B;

According to the type of edges: edged - O, unedged - BUT;

By deviation from flatness of sheets with a temporary resistance of 690 N/mm 2 (70 kgf/mm 2) or less by:

especially high flatness - PO, high flatness - PV, improved flatness - PU, normal flatness - PN.

1.2. It is allowed to produce thick sheet steel with a rolling accuracy higher than that specified in the order.

Official publication N O

Reproduction is prohibited

© Standards Publishing House, 1977 © STANDARDINFORM, 2009

2. ASSORTMENT

2.1. Hot-rolled plate steel is made with a thickness of 4 to 50 mm, cold-rolled steel - from 4 to 5 mm.

2.2. The shape, dimensions and maximum deviations in dimensions of thick sheet steel must meet the requirements:

For hot rolled steel - GOST 19903;

For cold rolled steel - GOST 19904.

Hot-rolled sheets with a thickness of more than 20 mm with a cut edge are produced by agreement between the manufacturer and the consumer.

High-precision hot-rolled sheets A are produced according to consumer demand.

(Revised edition, Rev. No. 2).

2.3. The deviation of the sheets from flatness must correspond to that indicated in the table. 1.

Notes:

1. At the request of the consumer, hot-rolled sheets with a thickness of 4-5 mm are produced with especially high flatness (HF), with a thickness of 6 mm or more - with increased (IF) and improved (PU) flatness.

2. By agreement between the manufacturer and the consumer, sheets with a thickness of more than 20 mm are produced without straightening. In this case, the deviation from flatness should not exceed 30 mm per 1 m of length.

3. For sheets in a heat-treated state without etching, deviation from flatness is not standardized.

Examples of symbols

Cold-rolled steel, heat-treated, pickled, thick sheet, grade 12Х18Н10Т, M2a surface group, increased rolling precision, with cut edge, improved flatness, size 5x1250x2500 mm:

A-0-PU-5x 1250x2500 GOST 19904-90

12Х18Н10Т- М2а GOST 7350-77

The same, hot rolled, heat treated, pickled, thick sheet, grade 20X13, MZb surface group, with uncut edge, normal flatness, size 40x1400x3000 mm:

NO-PN-40x 1400x3000 GOST 19903-74

20X13- M2b GOST 7350-77

3. TECHNICAL REQUIREMENTS

3.1. Plate steel is produced in the following grades: 20X13, 09Х16Н4Б, 12X13, 14Х17Н2, 08X13, 12X17, 08Х17Т, 15Х25Т, 07Х16Н6, 09Х17Н7У, 03Х18Н11, 03X17H14M3, 08Х22 Н6Т, 12Х21Н5Т, 08Х21Н6М2Т, 20Х23Н13, 08Х18Г8Н2Т, 15Х18Н12С4ТУ, 10Х14Г14Н4Т, 12Х17Г9АN4, 08Х17Н13М2Т, 10Х17Н13М2Т, 10X17H13M3T, 08Х17Н15МЗТ, 12Х18Н9, 17Х18Н9, 12Х18Н9Т,

04Х18Н10, 08Х18Н10, 08Х18Н10Т, 12Х18Н10Т, 08Х18Н12Т, 12Х18Н12Т, 08Х18Н12Б,

03Х21Н21М4ГБ, 03Х22Н6М2, 03Х23Н6, 20Х23Н18, 12Х25Н16G7AR, 06ХН28МДТ, 03ХН28МДТ, 15Х5М.

(Changed edition, Amendment No. 2, 3).

3.1a. Plate steel is manufactured in accordance with the requirements of this standard according to technological regulations approved in the prescribed manner.

3.2. The chemical composition of steel of all grades is in accordance with GOST 5632, except for steel grade 15Х5М, the chemical composition of which must comply with GOST 20072.

The chemical composition of steel grades 03Х23Н6 and 03Х22Н6М2 must correspond to table. 1a.

Table 1a

Notes:

1. In finished rolled products, deviations in mass fraction are allowed: silicon +0.4%, sulfur +0.005%, nickel +0.2%, chromium +0.5%.

2. In steel grade 03Х22Н6М2, an increase in the mass fraction of molybdenum of +0.2% is allowed.

3. The allowed mass fraction of residual titanium is no more than 0.05%, other residual elements - in accordance with GOST 5632.

(Revised edition, Rev. No. 2).

3.3. The sheets should be free of traces of shrinkage, delamination, foreign inclusions and bubbles.

3.4. The mechanical properties of heat-treated sheets must comply with the standards specified in table. 2.

steel grade	Heat treatment mode			Relative elongation 6 5,
	Annealing at 840-870 °C, cooling in air
	Normalization or hardening at 1000-1050 °C, air cooling, tempering at 680-780 °C, furnace or air cooling
	Annealing according to manufacturer's conditions	No more than 750 (76)
	Annealing or tempering at 650-700 °C	By agreement between the manufacturer and the consumer
	Annealing according to manufacturer's conditions	No more than 1030 (105)
	Quenching at 960-1020 °C, cooling in air, tempering at 680-780 °C, cooling in air or with a furnace
	Annealing according to manufacturer's conditions	No more than 650 (66)

Continuation of the table. 2

steel grade	Heat treatment mode	Tensile strength about in, N/mm 2 (kgf/mm 2)	Yield strength o t, N/mm 2 (kgf/mm 2)	Relative elongation 6 5,	Impact strength, KCU, J/cm 2 (kgf m/cm 2)
	Quenching at 960-1020 °C, cooling in water or in air, tempering at 680-780 °C, cooling in air or with a furnace
	Annealing according to manufacturer's conditions	No more than 650 (66)
	Annealing or tempering at 760-780 °C, cooling in air or with a furnace
	Annealing or tempering at 760-780 °C, air cooling
	Annealing or tempering at 740-780 °C, cooling in water
	Quenching at 1000-1050 °C, cooling in water
	Quenching 1030-1050 °C, cooling in water
	Quenching at 950-1050 °C, cooling in water or air
	Quenching at (1050+25) °C, cooling in water
	Quenching at 1030-1050 °C, cooling in water
	Quenching at 1030-1120 °C, cooling in water
	Quenching at 1050-1080 °C, cooling in water or air
	Quenching at 1030-1100 °C, cooling in water
08Х17Н15МЗТ*
	Quenching at 1080-1120 °C, cooling in water
	Hardening at 1050-1120 °C, cooling in water or under a water shower
	Quenching at 1030-1080 °C, cooling in water or air
	Quenching at 1050-1100 °C, cooling in water or air

End of table. 2

steel grade	Heat treatment mode	Tensile strength about in, N/mm 2 (kgf/mm 2)	Yield strength o t, N/mm 2 (kgf/mm 2)	Relative elongation 6 5,	Impact strength, KCU, J/cm 2 (kgf m/cm 2)
	Quenching at 1000-1080 °C, cooling in water or air
	Quenching at 1030-1080 °C, cooling in water or air
	Quenching at 1030-1080 °C, cooling in water or air
	Quenching at 1000-1100 °C, cooling in water or air
	Quenching at 1030-1130 °C, cooling in water
	Quenching at 1040-1080 °C, cooling in water
12X25N16G7AR*	Quenching at 1050-1150 °C, cooling in water or air
15Х18Н12С4ТУ*	Quenching at 1020-1050 °C, cooling in water or air
	Normalization at (1040+10) °C, air cooling	No more than 1180 (120)	No more than 390 (40)
03X21Н21М4ГБ*	Quenching at 1060-1120 °C, cooling in water or under a water shower
	Hardening at 980-1020 °C, cooling in water or under a water shower
	Quenching at 1030-1070 °C, cooling in air, twice the first tempering at 740-760 °C, cooling in air or water, second tempering at 580-680 °C, cooling in air		No more than 735 (75)
	Quenching 950-1080 °C, cooling in water
	Quenching at 1080-1100 °C, cooling in water or air

* For sheets of thickness St. 25 mm mechanical properties are not standardized, determination is required. Note. Annealing of steel sheets of grades 20X13, 12X13, 08X13 is carried out at the request of the consumer. The standards are not mandatory until 01/01/94. The definition is required for the data set.

(Changed edition, Amendment No. 2, 3).

3.5. The mechanical properties of the sheets, determined on control heat-treated samples, must comply with the standards specified in table. 3.

Table3

steel grade	Sample thermal treatment mode	Tensile strength about in, N/mm 2 (kgf/mm 2)	Yield strength o t, N/mm 2 (kgf/mm 2)	Relative elongation 6 5,	Impact strength, KCU, J/cm 2 (kgf m/cm 2)
	Quenching at 960-1050 °C, cooling in water or air, tempering at 275-350 °C, cooling in air
	Quenching at 950-980 °C, air cooling, tempering at 300-350 °C, air cooling
	Normalization at (975+10) °C, cold treatment at -70 °C for 2 hours, tempering at (425+10) °C for 1 hour, air cooling

Note: By agreement between the manufacturer and the consumer, it is allowed to change the heat treatment mode with a corresponding change in the standards of mechanical properties.

(Revised edition, Rev. No. 2).

3.6. The mechanical properties of cold-worked and semi-hardened sheets are not standardized, but are required to be determined. Standards are established by agreement between the manufacturer and the consumer.

3.7. In terms of type and surface quality, the sheets must meet the requirements specified in table. 4.

	Conditional designation	Material condition	Characteristic surfaces
		Hard-worked (N) and semi-hardened (PN)	Shiny, without bubbles - in full, rolled bubbles, captivity, pockmarked, over-etched, with a slight difference in shades	Scratches, nicks, prints, marks, rolled prints
			Silver-matte or shiny, without bubbles, swelling, rolled bubbles, film, cracks, scale and over-etching	Ripple, scratches, nicks, prints, marks, rolled out prints	Depth that does not take the sheet beyond the maximum deviations
				Same with shells

End of table. 4

	Conditional designation	Material condition	Characteristic surfaces	Name of allowed surface defects	Maximum depth of defects
		a) Cold rolled, heat treated or annealed		Same with shells	1/2 the sum of maximum deviations in thickness
		b) Hot rolled, heat treated, pickled or after bright annealing	Silver-matte or shiny, without blistering bubbles, rolled out bubbles, captivity, cracks, scale and over-grazing
		a) Cold rolled, heat treated, pickled or after bright annealing		Ripple, scratches, prints, nicks, scratches, rolled out prints
		b) Hot rolled, heat treated, pickled or after bright annealing		Same with shells	Sum of maximum deviations in thickness
		a) Hot rolled, heat treated, pickled or after bright annealing	Matte with a gray tint or shiny, without bubbles - in the form of rolled out bubbles	Ripple, scratches, prints, nicks, scratches, small rolled films, rolled prints
		b) Hot rolled, heat treated, pickled or after bright annealing	holes, cracks, scale and overgrass	Same with shells
		c) Cold rolled, heat treated		Ripple, scratches, prints, nicks, scratches, small rolling films, rolled prints, scale
		d) Hot rolled, heat treated		Ripple, scratches, prints, nicks, risks, small rolling-
		e) Hot rolled, unheated and unetched		films, shells, rolled prints, scale

Notes:

1. Requirements for the quality of the surface of heat-treated steel in terms of the number and nature of defects can be specified by agreement of the parties using standards.

2. Local gentle cleaning of the surface is allowed, and the depth of cleaning should not exceed the norms for the depth of permissible defects. Arson from clean-up operations is not permitted.

3. At the consumer’s request, sheets are produced without cleaning or cutting out unacceptable defects.

4. Tempering colors and various shades from pickling on cold-rolled and hot-rolled heat-treated sheets, pickled or after bright annealing, are not a defective sign.

5. Welding of defects on sheets is allowed by agreement with the consumer.

(Revised edition, Rev. No. 2).

3.8. Sheets made of steel grades 09Х17Н7У, 03Х18Н11, 03X17H14M3, 08Х22Н6Т, 08Х21Н6М2Т, 10Х14Г14Н4Т, 12Х17Г9АН4, 08Х17Н13М2Т, 10Х17Н13М2Т, 10X17H13M3T , 08Х17Н15МЗТ, 12Х18Н9, 12Х18Н9Т, 04Х18Н10, 08Х18Н10, 08Х18Н10Т, 12Х18Н10Т, 08Х18Н12Т, 12Х18Н12Т, 08Х18Н12Б, 08Х18Г8Н2Т, 03 Х21Н21М4ГБ, 03Х22Н6М2, 03Х23Н6, 06ХН28МДТ, 03ХН28МДТ should not be prone to intergranular corrosion.

Intergranular corrosion standards for steel grades 03Х22Н6М2 and 03Х23Н6 are not mandatory until 01/01/93. The definition is required for the data set.

(Changed edition, Amendment No. 2, 3).

3.9. At the consumer's request, sheets are produced with the following standardization:

a) susceptibility to embrittlement of steel grade 12Х21Н5Т. The heat treatment regime and standards must correspond to those indicated in the table. 5;

b) surface roughness of cold-worked and semi-hardened steel;

c) alpha phases in austenitic steels;

d) susceptibility to intergranular corrosion for steel grades not specified in GOST 6032;

e) impact strength of steels, for which in table. 2 impact strength not specified;

f) grain size;

g) mechanical properties of hot-rolled sheets supplied without heat treatment and pickling;

h) mechanical properties at elevated temperatures;

i) steel contamination with non-metallic inclusions;

j) mechanical properties different from those indicated in table. 2.

Note. The standards for subparagraphs b, c, d - j, as well as control methods for subparagraphs c, d are established by agreement between the manufacturer and the consumer.

3.10. At the consumer's request, sheets are produced:

a) checking the susceptibility to intergranular corrosion of steel grades 08Х17Т, 15Х25Т and 07Х16Н6;

b) checking internal defects using non-destructive methods. Standards are established by agreement between the manufacturer and the consumer;

c) without mechanical or other tests, provided that the standards established in this standard are met;

d) with control of the hardness of heat-treated sheets;

e) with bending test.

(Changed edition, Amendment No. 2, 3).

4. ACCEPTANCE RULES

4.1. Sheet steel is accepted in batches. The batch must consist of metal from one heat, one state of material, one thickness, and for heat-treated steel - one heat treatment mode. Sheets that differ in thickness by no more than 40% for sheets with a thickness of 4 to 12 mm, and by no more than 5 mm for sheets with a thickness of St. 12 mm.

By agreement between the manufacturer and the consumer, batches consisting of several heats of the same brand or one heat of sheets of different thickness are allowed.

(Changed edition, Amendment No. 3).

4.1.1. Each batch must be accompanied by a quality document in accordance with GOST 7566 with additional results:

Testing the mechanical properties of cold-worked and semi-hardened sheets and sheets with a thickness of St. 25 mm;

Testing sheets of steel grades 03Х22Н6М2 and 03Х23Н6 for susceptibility to intergranular corrosion;

Checking sheets for internal defects;

Hardness control.

(Introduced additionally, Amendment No. 2).

4.2. All sheets of the batch are subjected to surface control, deviations from flatness and dimensions.

The manufacturer is allowed to control deviations from flatness and dimensions of sheets selectively, but not less than on one sheet of each thickness in the batch.

4.3 To check the quality of sheets, select:

For tensile testing, determination of impact strength, grain size and surface roughness - one sheet per batch;

To determine the susceptibility to intergranular corrosion - according to GOST 6032;

To determine the contamination of steel with non-metallic inclusions - according to GOST 1778;

To check the chemical composition - according to GOST 7565.

To check the mechanical properties, susceptibility to intergranular corrosion, contamination with non-metallic inclusions and grain size, it is allowed to select the thickest sheet from a batch consisting of sheets of different thicknesses and the same heat treatment mode.

4.4. If unsatisfactory test results are obtained for at least one of the indicators, repeated tests are carried out on a sample selected in accordance with GOST 7566.

5. TEST METHODS

5.1. Sampling to determine the chemical composition of steel - according to GOST 7565. The chemical composition is determined according to GOST 12344 - GOST 12365, GOST 28473 or other methods that ensure the required accuracy of analysis.

5.2. The quality of the surface is checked without the use of magnifying devices.

5.3. Measurements of sheet thickness and deviations from flatness are carried out in accordance with GOST 19903 and GOST 19904. The dimensions and shape of sheets are checked with a measuring instrument that ensures the necessary measurement accuracy.

5.4. Selection and preparation of samples for mechanical tests are carried out according to GOST 7564 across the rolling direction, and for steel grade 09Х17Н7У - along the rolling direction.

From each control sheet the following is selected:

For tensile testing and determination of surface roughness - one sample at a time;

To determine impact strength and grain size - two samples each.

5.5. Tensile testing at room temperature is carried out according to GOST 1497, at elevated temperatures - according to GOST 9651 on short samples.

(Revised edition, Rev. No. 2).

5.6. Impact strength is determined only for sheets with a thickness of 11 mm or more according to GOST 9454 on type I samples.

5.7. Surface roughness is determined in accordance with the requirements of GOST 2789 using a profilograph-profilometer in accordance with GOST 19300 or by comparison with working samples.

(Revised edition, Rev. No. 2).

5.8. Contamination of steel with non-metallic inclusions is checked according to GOST 1778.

5.9. The grain size is determined according to GOST 5639.

5.10. Steel testing for susceptibility to intergranular corrosion is carried out according to GOST 6032.

Sheets without heat treatment are not tested for susceptibility to intergranular corrosion.

If unsatisfactory test results are obtained using the AMU and VU methods, by agreement between the manufacturer and the consumer, it is allowed to carry out repeated tests, respectively, according to method B.

Testing of steel grades 03Х23Н6 and 03Х22Н6М2 for susceptibility to intergranular corrosion is carried out using the DU method in accordance with GOST 6032.

Sheets made of steel grade 03Х22Н6М2 are controlled in a hardened state, and steel sheets made of grade 03Х23Н6 - in a state of hardening and subsequent tempering at 550 °C for 1 hour.

(Changed edition, Amendment No. 1, 2).

5.11. The absence of internal defects in the sheets specified in clause 3.3 is ensured by the production technology of steel and sheets.

Inspection is carried out visually at the edges of the sheets.

Ultrasonic inspection of internal defects is carried out at the request of the consumer according to regulatory and technical documentation (NTD).

(Revised edition, Rev. No. 2).

5.12. To test mechanical properties and the absence of a tendency to intergranular corrosion, it is allowed to use statistical methods controls approved in accordance with the established procedure.

5.13. Hardness determination is carried out according to GOST 9012 on workpieces for making tensile samples.

5.14. The bending test is carried out according to GOST 14019.

5.13, 5.14. (Introduced additionally, Amendment No. 2).

6. PACKAGING, LABELING, TRANSPORTATION AND STORAGE

6.1. Packaging, labeling, transportation and storage - in accordance with GOST 7566.

(Revised edition, Rev. No. 2).

6.2. (Deleted, Amendment No. 2).

6.3. When packing sheets into bundles, each bundle must consist of sheets from one batch. It is allowed to pack sheets of different batches made from the same melt into one pack. In this case, the batches must be separated by spacers. It is allowed to tie bundles of hot-rolled unetched sheets with transverse straps in an amount equal to the sum of the longitudinal and transverse straps provided for by GOST 7566. In this case, there should be no displacement of the sheets into bundles during transportation. Instead of marking the top sheet of the bundle, it is allowed to apply the markings to a metal card measuring at least 200x290 mm, firmly attached in at least two places to the packing tape on the top of the bundle.

APPLICATION. (Deleted, Amendment No. 1).

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the USSR Ministry of Ferrous Metallurgy

2. APPROVED AND ENTERED INTO EFFECT by Resolution of the State Committee of Standards of the Council of Ministers of the USSR dated July 21, 1977 No. 1786

3. INTRODUCED FOR THE FIRST TIME

4. The standard fully complies with ST SEV 6434-88

5. REFERENCE REGULATIVE AND TECHNICAL DOCUMENTS

	Item number		Item number
GOST 1497-84		GOST 12352-81
GOST 1778-70		GOST 12353-78
GOST 2789-73		GOST 12354-81
GOST 5632-72		GOST 12355-78
GOST 5639-82		GOST 12356-81
GOST 6032-2003		GOST 12357-84
GOST 6996-66		GOST 12358-2002
GOST 7564-97		GOST 12359-99
GOST 7565-81		GOST 12360-82
GOST 7566-94	4.1.1, 4.4, 6.1, 6.3	GOST 12361-2002
GOST 9012-59		GOST 12362-79
GOST 9454-78		GOST 12363-79
GOST 9651-84		GOST 12364-84
GOST 12344-2003		GOST 12365-84
GOST 12345-2001		GOST 14019-2003
GOST 12346-78		GOST 19300-86
GOST 12347-77		GOST 19903-74
GOST 12348-78		GOST 19904-90
GOST 12349-83		GOST 20072-74
GOST 12350-78		GOST 28473-90
GOST 12351-2003

6. The validity period was lifted according to Protocol No. 3-93 of the Interstate Council for Standardization, Metrology and Certification (IUS 5-6-93)

7. EDITION (November 2009) with Amendments No. 1, 2, 3, approved in November 1987, June 1988, October 1989 (IUS 2-88, 11-88, 2-90)

Editor //. V. Talanova Technical editor N. S. Grishanova Proofreader E. D. Dulneva Computer layout L.A. Circular

Signed for publication on December 15, 2009. Format 60x84 V g . Offset paper. Times typeface. Offset printing. Uel. oven l. 1.40. Academic ed. l. 1.20. Circulation 79 copies. Zach. 696.

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Printed in the branch of FSUE "STANDARTINFORM" - type. "Moscow Printer", 105062 Moscow, Lyalin lane, 6.