Thick plate sheet 12x18n10t GOST 7350 77. Thick plate steel, corrosion-resistant, heat-resistant

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Applies to thick 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 Amendments No. 1, 2, 3

1 Classification

2 Assortment

3 Technical requirements

4 Acceptance rules

5 Test methods

6 Packaging, labelling, transport and storage

This GOST is in:

Organizations:

21.07.1977	Approved	State Committee for Standards of the Council of Ministers of the USSR	1786
	Published	Standartinform	2009
	Published	IPK Standards Publishing House	2002
	Published	Standards Publishing House	1991
	Published	Standards Publishing House	1977
	Designed	USSR Ministry of Ferrous Metallurgy

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. Marks. Replaced by GOST 5632-2014.
GOST 6996-66Welded connections. Methods for determining mechanical properties
GOST 7564-97Rental. General rules for sampling, blanks and samples for mechanical and technological tests
GOST 7566-94Metal products. Acceptance, marking, packaging, transportation and storage. Replaced by GOST 7566-2018.
GOST 9651-84Metals. Tensile Test Methods at Elevated Temperatures
GOST 19903-74Rolled sheet hot rolled. Assortment. Replaced by GOST 19903-2015.
GOST 19904-90Rolled sheet 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 the determination of sulfur
GOST 28473-90Cast iron, steel, ferroalloys, chromium, manganese metal. General requirements for methods of analysis
GOST 19300-86Instruments for measuring surface roughness by the profile method. Contact profilographs. Types and basic parameters
GOST 12346-78silicon
GOST 12347-77Alloy and high alloy steels. Methods of determination phosphorus
GOST 12348-78Alloy and high alloy steels. Methods of determination manganese
GOST 12349-83Alloy and high alloy steels. Methods of determination tungsten
GOST 12350-78Alloy and high alloy steels. Methods of determination chrome
GOST 12352-81Alloy and high alloy steels. Methods of determination nickel
GOST 12353-78Alloy and high alloy steels. Methods of determination cobalt
GOST 12354-81Alloy and high alloy steels. Methods of determination molybdenum
GOST 12355-78Alloy and high alloy steels. Methods of determination copper
GOST 12356-81Alloy and high alloy steels. Methods of determination titanium
GOST 12357-84Alloy and high alloy steels. Methods of determination aluminum
GOST 12359-99Become
GOST 12360-82Alloy and high alloy steels. Methods of determination boron
GOST 12362-79Alloy and high alloy steels. Methods of determination microimpurities of antimony, lead, tin, zinc and cadmium
GOST 12363-79Alloy and high alloy steels. Methods of determination Selena
GOST 12364-84Alloy and high alloy steels. Methods of determination cerium
GOST 12365-84Alloy and high alloy steels. Methods of determination zirconium
GOST 1778-70Steel. Metallographic methods for the determination of non-metallic inclusions
GOST 5639-82Steels and alloys. Methods for detecting and determining grain size
GOST 7565-81Cast iron, steel and alloys. Sampling method for determining the chemical composition
GOST 12358-2002Alloy and high alloy steels. Methods of determination arsenic
GOST 12361-2002Alloy and high alloy steels. Methods of determination niobium
GOST 12344-2003Alloy and high alloy steels. Methods of determination carbon
GOST 14019-2003Metallic materials. Bending test method
GOST 6032-2003Become and corrosion-resistant alloys. Test Methods for Resistance to Intergranular Corrosion. Replaced by GOST 6032-2017.
GOST 12351-2003Become doped and high alloyed. Vanadium determination methods
GOST 12359-81Become carbon, alloyed and high-alloyed. Methods for the determination of nitrogen. Replaced by GOST 12359-99.

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INTERSTATE STANDARD

PLATE STEEL
CORROSION-RESISTANT, HEAT-RESISTANT
AND HEAT RESISTANT

TECHNICAL CONDITIONS

Introduction date 01.01.79

This standard applies to thick 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 subdivided:

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

cold-rolled hard-worked - H1,

cold-rolled semi-hard-worked - 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 non-etched - M5g,

hot-rolled without heat treatment and unetched - 5d;

Rolling accuracy:

increased accuracy - A,

normal accuracy - B;

By the type of edges on:

trimmed - Oh,

unedged - BUT;

According to the deviation from flatness of sheets with a tensile strength of 690 N / mm 2 (70 kgf / mm 2) or less by:

especially high flatness - software,

high flatness - PV,

improved flatness - PU,

normal flatness - PN.

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

2. ASSORTMENT

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

2.2. The shape, dimensions and maximum deviations in dimensions of steel plate must comply with 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.

Hot-rolled sheets of increased rolling accuracy A are produced at the request of the consumer.

(Revised edition, Rev. No. 2).

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

Table 1

Tensile strength, N / mm 2 (kgf / mm 2)

Deviation of sheets from flatness per 1 m of length, mm

hot-rolled

cold-rolled

Up to 690 (70) incl.

The chemical composition of steel grades 03X23H6 and 03X22H6M2 must comply with Table. 1a.

Table 1a

steel grade	Mass fraction of elements, %
		Manganese	Molybdenum
			Molybdenum

Notes:

1. A deviation in mass fraction is allowed in finished rolled products: silicon +0.4%, sulfur +0.005%, nickel ± 0.2%, chromium +0.5%.

2. In steel grade 03Kh22N6M2, an increase in the mass fraction of molybdenum + 0.2% is allowed.

3. The mass fraction of residual titanium is allowed not more than 0.05%, other residual elements - in accordance with GOST 5632.

(Revised edition, Rev. No. 2).

3.3. The sheets should not have any traces of a shrinkage cavity, delaminations, 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
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 the manufacturer's mode	No more than 750 (76)
	Annealing or tempering at 650 - 700 °C	By agreement between the manufacturer and the consumer
	Annealing according to the manufacturer's mode	No more than 1030 (105)
	Quenching at 960 - 1020 °C, cooling in air, tempering at 680 - 780 °C, cooling in air or with an oven
	Annealing according to the manufacturer's mode	No more than 650 (66)
	Hardening 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 the manufacturer's mode	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
	Hardening at 1000 - 1050 °C, cooling in water
	Hardening 1030 - 1050 °C, cooling in water
	Hardening at 950 - 1050 °C, cooling in water or in air
	Hardening at (1050 ± 25) °C, cooling in water
	Hardening at 1030 - 1050 °C, cooling in water
	Hardening at 1030 - 1120 °C, cooling in water
	Hardening at 1050 - 1080 °C, cooling in water or in air
12H17G9AN4*	Hardening at 1030 - 1100 °C, cooling in water



08X17H15M3T *
	Hardening at 1080 - 1120 °C, cooling in water
	Hardening at 1050 - 1120 ° C, cooling in water or under a water shower
	Hardening at 1030 - 1080 °C, cooling in water or in air
	Hardening at 1050 - 1100 °C, cooling in water or in air
	Hardening at 1050 - 1100 °C, cooling in water or in air
	Hardening at 1000 - 1080 °C, cooling in water or in air
	Hardening at 1000 - 1080 °C, cooling in water or in air
	Hardening at 1030 - 1080 °C, cooling in water or in air
	Hardening at 1030 - 1080 °C, cooling in water or in air
	Hardening at 1000 - 1100 °C, cooling in water or in air
	Hardening at 1030 - 1130 °C, cooling in water
	Hardening at 1040 - 1080 °C, cooling in water
12X25N16G7AR *	Hardening at 1050 - 1150 °C, cooling in water or in air
15X18H12S4TYu *	Hardening at 1020 - 1050 °C, cooling in water or in air	690 - 930 (70 - 95)
	Normalization at (1040 ± 10) °C, air cooling	No more than 1180 (120)	No more than 390 (40)
03X21N21M4GB *	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, two first tempering at 740 - 760 °C, air or water cooling, second tempering at 580 - 680 °C, air cooling		No more than 735 (75)
	Hardening 950 - 1080 °C, cooling in water

	Hardening at 1080 - 1100 °C, cooling in water or in air

* For sheets with a thickness of St. 25 mm mechanical properties are not standardized, the definition is mandatory.

Note. Annealing of sheets of steel grades 20X13, 12X13, 08X13 is carried out at the request of the consumer. Norms are not binding until 01.01.94. The definition is required for the data set.

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

Table 3

steel grade	Sample heat treatment mode	Tensile strength s in, N / mm 2 (kgf / mm 2)	Yield strength s t, N / mm 2 (kgf / mm 2)	Relative elongation δ 5 %	Impact strength, KCU, J / cm 2 (kgf m / cm 2)
steel grade	Sample heat treatment mode
	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) °С, cold treatment at -70 °С for 2 h, tempering at (425 ± 10) °С for 1 h, cooling in air

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

(Revised edition, Rev. No. 2).

3.6. The mechanical properties of hard-worked and semi-hard-worked sheets are not standardized, but they must be determined. The standards are established by agreement between the manufacturer and the consumer.

3.7. By the type and quality of the surface, the sheets must meet the requirements specified in Table. 4.

Table 4

Surface group	Symbol groups	Material condition	Surface characteristic	Name of permissible surface defects	Maximum Defect Depth
		Hard-worked (N) and semi-hard-worked (PN)	Brilliant, without blisters, rolled bubbles, captivity, ripples, overetching, with a slight difference in shades	Scratches, nicks, prints, marks, rolled prints
				Ripple, scratches, nicks, prints, risks, rolled prints	Depth that does not lead the sheet beyond the limit deviations
				Same with shells
		a) Cold rolled, heat treated or annealed	Silver-matt or shiny, without blisters, rolled bubbles, captivity, cracks, scale and overtreatment		1/2 the sum of the limit deviations in thickness
		b) Hot rolled, heat treated, pickled or bright annealed		Same with shells	1/2 the sum of the limit deviations in thickness
		a) Cold rolled, heat treated, pickled or bright annealed		Ripple, scratches, prints, nicks, scratches, rolled prints	Sum of limit deviations in thickness
		b) Hot rolled, heat treated, pickled or bright annealed		Same with shells
		a) Hot rolled, heat treated, pickled or bright annealed	Matt with a gray tint or shiny, without blisters, rolled bubbles, cracks, scale and overetching	Ripple, scratches, prints, nicks, risks, small rolling films, rolled prints
		b) Hot rolled, heat treated, pickled or bright annealed		Same with shells
		c) Cold rolled, heat treated		Ripple, scratches, prints, nicks, risks, small rolling films, rolled prints, scale
		d) Hot-rolled, heat-treated		Ripple, scratches, prints, nicks, risks, small rolling films, shells, rolled prints, scale
		e) Hot-rolled, heat-treated and non-pickled

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 according to standards.

2. Local shallow cleaning of the surface is allowed, while the cleaning depth should not exceed the norms for the depth of occurrence of permissible defects. Arson from stripping is not allowed.

3. At the request of the consumer, sheets are produced without stripping and 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 rejection sign.

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

(Revised edition, Rev. No. 2).

3.8. Sheets of steel grades 09X17H7YU, 03X18H11, 03X17H14M3, 08X22H6T, 08X21H6M2T, 10X14G14N4T, 12X17G9AN4, 08X17H13M2T, 10X17H13M2T, 10X17H13M3T, 08X17H15M3T, 12X18H9, 12X18H9T, 04X18H10, 08X18H10, 08X18H10T, 12X18H10T, 08X18H12T, 12X18H12T, 08X18H12B, 08X18G8N2T, 03X 21N21M4GB, 03X22N6M2, 03Kh23N6, 06KhN28MDT, 03KhN28MDT should not be prone to intergranular corrosion.

Intergranular corrosion standards for steel grades 03X22H6M2 and 03X23H6 are not mandatory until 01.01.93. The definition is required for the data set.

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

3.9. At the request of the consumer, sheets are produced with rationing:

a) susceptibility to embrittlement of steel grade 12X21H5T. The heat treatment mode and norms must correspond to those indicated in Table. 5;

b) surface roughness of hard-worked and semi-hard-worked 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 is 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) contamination of steel with non-metallic inclusions;

j) mechanical properties other than those indicated in Table. 2.

Note. Rules for subparagraphs b, c, e - k, as well as methods of control under subparagraphs c, g set by agreement between the manufacturer and the consumer.

Table 5

3.10. At the request of the consumer, sheets are produced:

a) with checking the tendency to intergranular corrosion of steel grades 08X17T, 15X25T and 07X16H6;

b) with verification of internal defects by non-destructive methods. The 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 hardness of heat-treated sheets;

e) with a bend test.

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

4. ACCEPTANCE RULES

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

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

(Revised edition, Rev. No. 3).

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

Tests of the mechanical properties of hard-worked and semi-hard-worked sheets and sheets with a thickness of St. 25 mm;

Testing sheets of steel grades 03X22H6M2 and 03X23H6 for susceptibility to intergranular corrosion;

Checking sheets for internal defects;

Hardness control.

(Introduced additionally, Amendment No. 2).

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

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

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

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

To determine the tendency 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 a sheet of the greatest thickness from a batch consisting of sheets of different thicknesses and one heat treatment mode.

4.4. Upon receipt of unsatisfactory test results for at least one of the indicators, repeated tests are carried out on a sample selected according to 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 provide the required accuracy of the analysis.


Designation	GOST 7350-77
Title in Russian	Steel plate corrosion-resistant, heat-resistant and heat-resistant. Specifications
Title in English	Plate steel, corrosion-resistant, heat-resistant and high-temperature. Specifications
Date of entry into force	01.01.1979
OKS	77.140.20
OKP code	098500; 098600
KGS code	B33
SRSTI rubricator index	534331
Annotation (scope)	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
The document was submitted by the CIS organization	Minchermet of the USSR
Department of Rostekhregulirovanie	320 - Management of standardization and certification of raw materials and materials
MND developer	Russian Federation
Interstate TC	120 - Cast iron, steel, rolled
Date of last edition	01.10.2002
Number(s) of change(s)	reissue with rev. 1; 2; 3
Included in the collection	High quality steels
Number of pages (original)	11
Organization - Developer	Minchermet of the USSR
Status	Active

PLATE STEEL
CORROSION-RESISTANT,
HEAT-RESISTANT AND HEAT-RESISTANT

TECHNICAL CONDITIONS

GOST 7350-77
(ST SEV 6434-88)

USSR STATE COMMITTEE
ON PRODUCT QUALITY MANAGEMENT AND STANDARDS

Moscow

STATE STANDARD OF THE UNION OF THE SSR

Validity from 01.01.79

until 01.01.94

This standard applies to thick 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 plate corrosion-resistant, heat-resistant and heat-resistant steel is subdivided:

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

cold-rolled hard-worked - H1,

cold-rolled semi-hard-worked - 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 non-etched - M5g,

hot-rolled without heat treatment and unetched - M5d;

by rolling accuracy:

increased accuracy - A,

normal accuracy - B;

by the type of edges on:

edged - O;

unedged - BUT;

according to the non-flatness of sheets with a temporary resistance of 690 N / mm 2 (70 kgf / mm 2) and less by:

especially high flatness - ON; high flatness - PV,

improved flatness - PU,

normal flatness - PN.

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

2. ASSORTMENT

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

2.2. The shape, dimensions and maximum deviations in dimensions of steel plate must comply with 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.

Hot-rolled sheets of increased rolling accuracy A are produced at the request of the consumer.

(Revised edition, Rev. No. 2).

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

Table 1

Tensile strength, N/mm 2 )	Non-flatness of sheets per 1 m of length, mm
Tensile strength, N/mm 2 )	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 an especially high flatness (PO), a thickness of 6 mm or more - with increased (PV) 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.

Legend Examples

Cold-rolled steel, heat-treated, pickled, plate, grade 12 X18H10T , M2a surface group, increased rolling accuracy, with sheared edge, improved flatness, size 5 1250 2500 mm:

The same, hot-rolled, heat-treated, pickled, plate, grade 20X13, M3b surface group, with unedged 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 17H 2, 08X13, 12X17, 08X17T, 15X25T, 07X16H6, 09X17H7Yu, 03 X18H 11, 03X17H14M3, 08X22H6T, 12 X21H5T . X 17 H 13 M 3 T . 21H21M4GB, 03X22N6M2, 03X23H6, 20X23H18, 12X25H16G7AR, 06XH28MDT, 03XH28MDT, 15X5M.

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

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

3.2. The chemical composition of steel of all grades - according to , except for steel grade 15X5M, the chemical composition of which must correspond to that specified in .

The chemical composition of grades 03X23H6 and 03X22H6M2 must comply with Table. A.

3.3. The sheets should not have any traces of a shrinkage cavity, delaminations, 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 the 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				Manganese	Chromium	Nickel	Molybdenum
03X23H6	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. Deviation in mass fraction is allowed in finished rolled products: silicon +0.4%, sulfur +0.005%, nickel ± 0.2%, chromium +0.5%.

2. In steel grade 03Kh22N6M2, an increase in the mass fraction of molybdenum + 0.2% is allowed.

3. The mass fraction of residual titanium is allowed not more than 0.05%, other residual elements - in accordance with GOST 5632-72.

(Revised edition, Rev. No. 2).

3.7. By the type and quality of the surface, the sheets must meet the requirements specified in Table. .

3.8 Sheets of steel grades 09Kh17N7Yu, 03Kh18N11, 03Kh17N14M3, 08Kh22N6T, 08Kh21N6M2T, 10KH14G14N4T, 12KH17G9AN4, 08KH17N13M2T, 10KH17N13M2T, 10KH17N13 M3T, 08X17H15M3T, 12X18H9, 12X18H9T, 04X18H10, 08X18H10, 08X18H10T, 12X18H10T, 08X18H12T, 12X18H12T, 08X18H12B, 08X18G8N2T, 03X21N21M4GB, 03X22N6M2 ; 03Kh23N6, 06KhN28MDT, 03KhN28MDT should not be prone to intergranular corrosion.

Intergranular corrosion standards for steel grades 03Kh22N6M2 and 03Kh23N6 are not mandatory until 01.01.93. The definition is mandatory for the data set.

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

3.9. At the request of the consumer, sheets are produced with rationing:

a) susceptibility to embrittlement of steel grade 12X21H5T. The heat treatment mode and norms must correspond to those indicated in Table. .

b) surface roughness of hard-worked and semi-hard-worked 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 COP U , J / cm 2 (kgf m / cm 2)
	Heat treatment mode	at least
15X5M	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)
20X13	Annealing according to the manufacturer's mode	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 the manufacturer's mode	no more than 1030 (105)
12X13	Hardening at 960-1020 ° C, air cooling, tempering at 680-780 ° C	490 (50)	345 (35)
12X13	Annealing according to the manufacturer's mode	No more than 650 (66)	250 (25)
08X13	Hardening at 960-1020 ° C, cooling in water or air, tempering at 680-780 ° C, air-cooled or oven	420 (43)	295 (30)
08X13	Annealing according to the manufacturer's mode	No more than 650 (66)	250 (25)
12X17*	Annealing or tempering at 760-780 ° C, air-cooled or with oven	440 (45)
08X17T*	Annealing or tempering at 760-780 ° C, air cooling	440 (45)
15X2T*	Annealing or tempering at 740-780 ° C, cooling in water	440 (45)			20 (2)
08Х22Н6Т	Hardening at 1000-1050 ° C, cooling in water	590 (60)	345 (35)		59 (6)
03X23H6	Hardening 1030-1050 ° C, cooling in water	590 (60)	345 (35)
12Х21Н5Т*	Hardening at 950-1050 °	690 (70)	390 (40)
08Х21Н6М2Т	Hardened at 1050± 25 ° C, cooling in water	590 (60)	345 (35)		59 (6)
03Х22Н6М2	Hardening at 1030-1050 ° C, cooling in water	590 (60)	345 (35)
20X23H13*	Hardening at 1030-1120 ° C, cooling in water	570 (58)
10H14G14N4T	Tempering at 1050-1080 ° C, cooling in water or air	590 (60)	245 (25)
12H17G9AN4*	Hardening at 1030-1100 ° C, cooling in water	690 (70)	345 (35)
10X17H13M2T	Tempering at 1030-1080 ° C, cooling in water or air	530 (54)	235 (24)
08X17H13M2T	Tempering at 1030-1080 ° C, cooling in water or air	510 (52)	196 (20)
10X17H13M3T	Tempering at 1030-1080 ° C, cooling in water or air	530 (54)	235 (24)
08X17H15M3T*	Tempering at 1030-1080 ° C, cooling in water or air	510 (52)	196 (20)
17X18H9	Tempering at 1080-1120 ° C, cooling in water	590 (60)	265 (27)
12X18H9	Hardening at 1050-1120 °	530 (54)	215 (22)
12Х18Н9Т	Tempering at 1030-1080 ° C, cooling in water or air	530 (54)	215 (22)
08X18Н10	Hardening at 1050-1100 ° C, cooling in water or air	510 (52)	205 (21)
04X18Н10	Hardening at 1050-1100 ° C, cooling in water or air	490 (50)	175 (18)
12X18H10T	Hardening at 1000-1080 ° C, cooling in water or air	530 (54)	235 (24)		-
08X18H10T	Hardening at 1000-1080 ° C, cooling in water or air	510 (52)	205 (21)
12X18H12T	Tempering at 1030-1080 ° C, cooling in water or air	530 (54)	235 (24)
08Х18Н12Т	Tempering at 1030-1080 ° C, cooling in water or air	510 (52)	205 (21)
08X18N12B	Hardening at 1000-1100 ° C, cooling in water or air	510 (52)	205 (21)
20X23H18	Hardening at 1030-1130 ° C, cooling in water	540 (55)	265 (27)
03X28MDT*	Tempering at 1040-1080 ° C, cooling in water	540 (55)	215 (22)
12X25N16G7AR*	Hardening at 1050-1150 ° C, cooling in water or air	740 (75)	390 (40)
15Х18Н12С4ТЮ*	Hardening at 1020-1050 ° C, cooling in water or air	690-930 (70-95)	345 (35)
07X16H6	Normalization at (1040± 10) ° C, air cooling	no more than 1180 (120)	no more than 390 (40)
03X21N21M4GB*	Tempering at 1060-1120 ° C, cooling in water or under a water shower	590 (60)	295 (30)
08X18G8N2T	Hardening at 980-1020 ° C, cooling in water or under a water shower	590 (60)	345 (35)		59 (6)
09 X17 H7Yu	Hardening at 1030-1070 ° C, air cooling, double first tempering at 740-760 ° C, air or water cooling, second tempering at 580-680 ° C, air cooling	830 (85)	no more than 735 (75)	12	49 (5)
06HN28MDT	Hardening 950-1080 ° C, cooling in water	540 (55)	215 (22)	35	-
03Х18Н11	Tempering at 1080-1100 ° C, cooling in water or air	490 (50)	196 (20)	40	-
03Х17Н14М3	Tempering at 1080-1100 ° C, cooling in water or air	490 (50)	196 (20)	40	-

* For sheets with a thickness of more than 25 mm, mechanical properties are not standardized, the definition is mandatory.

Note. Annealing of sheets of steel grades 20X13, 12X13, 08X13 is carried out at the request of the consumer. Norms are not binding until 01.01.94. The definition is required for the data set.

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

Table 3

	Sample 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 COP U , J / cm 2 (kgf m / cm 2)
	Sample heat treatment mode	at least
14X17H2	Hardening at 960-1050 ° C, cooling in water or air, tempering at 275-350 ° C, air cooling	1080 (110)	885 (90)	10	-
09X16N4B	Hardening at 950-980 °C, cooling in air, tempering at 300-350 ° C, air cooling	1230 (125)	980 (100)	8	-
07X16H6	Normalization at (975± 10) ° C, cold treatment at - 70 ° From 2 o'clock, leave at (425± 10) ° From 1 h, 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 norms of mechanical properties.

(Revised edition, Rev. No. 2).

Table 4

	Group symbol	Material condition	Surface characteristic	Name of permissible surface defects	Maximum Defect Depth
1	H1 PN1	Hard-worked (N) and semi-hard-worked (PN)	Brilliant, without blisters, rolled bubbles, captivity, ripples, overetching, with a slight difference in shades	Scratches, nicks, prints, marks, rolled prints
2	M2a		Silver-matte or shiny, without blisters, rolled bubbles, captivity, cracks, scale and overtreatment	Ripple, scratches, nicks, prints, risks, rolled prints	Depth that does not lead the sheet beyond the limit deviations
2	M2b			Same with shells
3	M3a	a) Cold rolled, heat treated or annealed			1/2 the sum of the limit deviations in thickness
3	M3b	b) Hot rolled, heat treated, pickled or bright annealed		Same with shells	1/2 the sum of the limit deviations in thickness
4	M4a	a) Cold rolled, heat treated, pickled or bright annealed		Ripple, scratches, prints, nicks, scratches, rolled prints	Sum of limit deviations in thickness
4	M4b	b) Hot rolled, heat treated, pickled or bright annealed		Same with shells	Sum of limit deviations in thickness
5	M5a	a) Hot rolled, heat treated, pickled or bright annealed	Matte with a gray tint or shiny, without bubbles, swelling,	Ripple, scratches, prints, nicks, risks, small rolling films, rolled prints	Sum marginal thickness deviations
	M5b	b) Hot rolled, heat treated, pickled or bright annealed	rolled bubbles, cracks, scale and overtreatment	Same with shells
	M5v	c) Cold rolled, heat treated	Dark	Ripple, scratches, prints, nicks, risks, small rolling films, rolled prints, scale
	M5g	d) Hot-rolled, heat-treated		Ripple, scratches, prints, nicks, risks, small rolling films, shells, rolled prints, scale
	5d	e) Hot-rolled, heat-treated and non-pickled		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 according to standards.

2. Local shallow cleaning of the surface is allowed, while the cleaning depth should not exceed the norms for the depth of occurrence of permissible defects. Arson from stripping is not allowed.

3. At the request of the consumer, sheets are produced without stripping and 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 rejection sign.

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

(Revised edition, Rev. 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) contamination of steel with non-metallic inclusions;

Note. Rules for subparagraphs b, V, d, e, and, h, And, To, as well as control methods for 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 COP U , J / cm 2 (kgf m / cm 2), at least

Heating up to 550 ° C, exposure 1 h, cooling with an oven at a speed of 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 request of the consumer, sheets are produced:

a) with checking the tendency to intergranular corrosion of steel grades 08X17T, 15X25T and 07X16H6;

b) with verification of internal defects by non-destructive methods. The norms 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 hardness of heat-treated sheets;

e) with a bend test.

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

4. ACCEPTANCE RULES

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

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

(Revised edition, Rev. No. 3).

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

results of testing the mechanical properties of hard-worked and semi-hard-worked sheets and sheets with a thickness of over 25 mm;

results of testing sheets of steel grades 03X22H6M2 and 03X23H6 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 surface control, non-flatness and dimensions.

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

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

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

to determine the tendency 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.

4.4. Upon receipt of unsatisfactory test results for at least one of the indicators, repeated tests are carried out on a sample selected according to 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 provide the required accuracy of the analysis.

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

5.3. Measurement of sheet thickness and non-flatness is carried out according to and GOST 19904-74. The dimensions and shape of the sheets are checked with a measuring tool that provides the necessary measurement accuracy.

5.4. Sampling and preparation of samples for mechanical testing is carried out in accordance with GOST 7564-73 across the rolling direction, and for steel grade 09Kh17N7Yu - along the rolling direction.

From each control sheet select:

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

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

5.5. Tensile test at room temperature is carried out according to , at elevated temperature 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 on samples of type 1.

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

(Revised edition, Rev. 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 the tendency to intergranular corrosion.

Upon receipt of unsatisfactory test results according to the AMU and VU methods, upon agreement between the manufacturer and the consumer, it is allowed to conduct repeated tests according to the AM and B methods, respectively;

The test of steel grades 03X23H6 and 03X22H6M2 for a tendency to intergranular corrosion is carried out according to the method DU GOST 6032-84.

Sheets of steel grade 03Kh22N6M2 are controlled in the hardened state, and steel grade 03Kh23N6 - in the state of hardening and subsequent tempering at 550 ° C within 1 hour.

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

Control is carried out visually on the edges of the sheets.

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

(Revised edition, Rev. No. 2).

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

5.13. The determination of hardness is carried out according to on workpieces for the manufacture of tensile specimens.

5.14. The bending test is carried out according to .

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

6. PACKAGING, LABELING, TRANSPORT AND STORAGE

6.1. Packing, marking, transportation and storage - in accordance with GOST 7566-81.

(Revised edition, Rev. No. 2).

6.2. (Deleted, Rev. No. 2).

6.3. When packing sheets in packs, each pack must consist of sheets of one batch. It is allowed to pack sheets of different batches made from the same melt into one bundle. In this case, the parties must be separated by spacers. It is allowed to bandage 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 in packs during transportation. Instead of marking the top sheet of the pack, it is allowed to mark on a metal card with a size of at least 200 290 mm, firmly attached at least in two places to the packing tape on the top of the pack.

APPLICATION. (Deleted, Rev. No. 1).

INFORMATION DATA

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

DEVELOPERS

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

2. APPROVED AND INTRODUCED BY Decree of the State Committee for 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 REGULATIONS 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 Changes 1, 2, 3 approved in November 1987, June 1988, October 1989 (IUS 2-88, 11-88, 2-90)

CONTENT

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

STATE STANDARD OF THE UNION OF THE SSR

PLATE STEEL
CORROSION-RESISTANT,
HEAT-RESISTANT AND HEAT-RESISTANT

TECHNICAL CONDITIONS

GOST 7350-77
(ST SEV 6434-88)

USSR STATE COMMITTEE
ON PRODUCT QUALITY MANAGEMENT AND STANDARDS

Moscow

STATE STANDARD OF THE UNION OF THE SSR

Validity from 01.01.79

until 01.01.94

This standard applies to thick 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 plate corrosion-resistant, heat-resistant and heat-resistant steel is subdivided:

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

cold-rolled hard-worked - H1,

cold-rolled semi-hard-worked - 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 non-etched - M5g,

hot-rolled without heat treatment and unetched - M5d;

by rolling accuracy:

increased accuracy - A,

normal accuracy - B;

by the type of edges on:

edged - O;

unedged - BUT;

according to the non-flatness of sheets with a temporary resistance of 690 N / mm 2 (70 kgf / mm 2) and less by:

especially high flatness - ON; high flatness - PV,

improved flatness - PU,

normal flatness - PN.

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

2. ASSORTMENT

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

2.2. The shape, dimensions and maximum deviations in dimensions of steel plate must comply with 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.

Hot-rolled sheets of increased rolling accuracy A are produced at the request of the consumer.

(Revised edition, Rev. No. 2).

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

Table 1

Tensile strength, N / mm 2 (kgf / mm 2 )	Non-flatness of sheets per 1 m of length, mm
Tensile strength, N / mm 2 (kgf / mm 2 )	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 :

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

Legend Examples

Cold-rolled steel, heat-treated, pickled, plate, grade 12 X18H10T , M2a surface group, increased rolling accuracy, with sheared edge, improved flatness, size 5´ 1250 ´ 2500 mm:

The same, hot-rolled, heat-treated, pickled, plate, grade 20X13, M3b surface group, with unedged 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 17H 2, 08X13, 12X17, 08X17T, 15X25T, 07X16H6, 09X17H7Yu, 03 X18H 11, 03X17H14M3, 08X22H6T, 12 X21H5T . X 17 H 13 M 3 T . 21H21M4GB, 03X22H6M2, 03X23H6, 20X23H18, 12X25H16G7AR, 06XH28MDT, 03XH28MDT, 15X5M.

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

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

3.2. The chemical composition of steel of all grades - according to GOST 5632-72 , except for steel grade 15X5M, the chemical composition of which must correspond to that specified inGOST 20072-74.

The chemical composition of grades 03X23H6 and 03X22H6M2 must comply with Table. A.

3.3. The sheets should not have any traces of a shrinkage cavity, delaminations, 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 the 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				Manganese	Chromium	Nickel	Molybdenum
03X23H6	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. Deviation in mass fraction is allowed in finished rolled products: silicon +0.4%, sulfur +0.005%, nickel± 0.2%, chromium +0.5%.

2. In steel grade 03Kh22N6M2, an increase in the mass fraction of molybdenum + 0.2% is allowed.

3. The mass fraction of residual titanium is allowed not more than 0.05%, other residual elements - according to GOST 5632-72.

(Revised edition, Rev. No. 2).

3.7. By the type and quality of the surface, the sheets must meet the requirements specified in Table. .

Intergranular corrosion standards for steel grades 03Kh22N6M2 and 03Kh23N6 are not mandatory until 01.01.93. The definition is mandatory for the data set.

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

3.9. At the request of the consumer, sheets are produced with rationing:

a) susceptibility to embrittlement of steel grade 12X21H5T. The heat treatment mode and norms must correspond to those indicated in Table. .

b) surface roughness of hard-worked and semi-hard-worked 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 B, N / mm 2 (kgf / mm 2)	Yield strengths t, N / mm 2 (kgf / mm 2)	Relative extensionδ5, %	Impact strength COPU, J / cm 2 (kgf m / cm 2)
steel grade	Heat treatment mode	at least
15X5M	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)
20X13	Annealing according to the manufacturer's mode	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 the manufacturer's mode	no more than 1030 (105)
12X13	Hardening at 960-1020° C, air cooling, tempering at 680-780° C	490 (50)	345 (35)
12X13	Annealing according to the manufacturer's mode	No more than 650 (66)	250 (25)
08X13	Hardening at 960-1020° C, cooling in water or air, tempering at 680-780° C, air-cooled or oven	420 (43)	295 (30)
08X13	Annealing according to the manufacturer's mode	No more than 650 (66)	250 (25)
12X17*	Annealing or tempering at 760-780° C , air-cooled or with oven	440 (45)
08X17T*	Annealing or tempering at 760-780° C, air cooling	440 (45)
15X2T*	Annealing or tempering at 740-780° C, cooling in water	440 (45)			20 (2)
08Х22Н6Т	Hardening at 1000-1050° C, cooling in water	590 (60)	345 (35)		59 (6)
03X23H6	Hardening 1030-1050 ° C, cooling in water	590 (60)	345 (35)
12Х21Н5Т*	Hardening at 950-1050°	690 (70)	390 (40)
08Х21Н6М2Т	Hardened at 1050 ± 25 ° C, cooling in water	590 (60)	345 (35)		59 (6)
03Х22Н6М2	Hardening at 1030-1050° C, cooling in water	590 (60)	345 (35)
20X23H13*	Hardening at 1030-1120° C, cooling in water	570 (58)
10H14G14N4T	Tempering at 1050-1080° C, cooling in water or air	590 (60)	245 (25)
12H17G9AN4*	Hardening at 1030-1100° C, cooling in water	690 (70)	345 (35)
10X17H13M2T	Tempering at 1030-1080° C, cooling in water or air	530 (54)	235 (24)
08X17H13M2T	Tempering at 1030-1080° C, cooling in water or air	510 (52)	196 (20)
10X17H13M3T	Tempering at 1030-1080° C, cooling in water or air	530 (54)	235 (24)
08X17H15M3T*	Tempering at 1030-1080° C, cooling in water or air	510 (52)	196 (20)
17X18H9	Tempering at 1080-1120° C, cooling in water	590 (60)	265 (27)
12X18H9	Hardening at 1050-1120°	530 (54)	215 (22)
12Х18Н9Т	Tempering at 1030-1080° C, cooling in water or air	530 (54)	215 (22)
08X18H10	Hardening at 1050-1100° C, cooling in water or air	510 (52)	205 (21)
04X18Н10	Hardening at 1050-1100° C, cooling in water or air	490 (50)	175 (18)
12X18H10T	Hardening at 1000-1080° C, cooling in water or air	530 (54)	235 (24)		-
08X18H10T	Hardening at 1000-1080° C, cooling in water or air	510 (52)	205 (21)
12X18H12T	Tempering at 1030-1080° C, cooling in water or air	530 (54)	235 (24)
08Х18Н12Т	Tempering at 1030-1080° C, cooling in water or air	510 (52)	205 (21)
08X18N12B	Hardening at 1000-1100° C, cooling in water or air	510 (52)	205 (21)
20X23H18	Hardening at 1030-1130° C, cooling in water	540 (55)	265 (27)
03X28MDT*	Tempering at 1040-1080° C, cooling in water	540 (55)	215 (22)
12X25N16G7AR*	Hardening at 1050-1150° C, cooling in water or air	740 (75)	390 (40)
15Х18Н12С4ТЮ*	Hardening at 1020-1050° C, cooling in water or air	690-930 (70-95)	345 (35)
07X16H6	Normalization at (1040± 10) ° C, air cooling	no more than 1180 (120)	no more than 390 (40)
03X21N21M4GB*	Tempering at 1060-1120° C, cooling in water or under a water shower	590 (60)	295 (30)
08X18G8N2T	Hardening at 980-1020° C, cooling in water or under a water shower	590 (60)	345 (35)		59 (6)
09 X 17 H 7Y	Hardening at 1030-1070° C, air cooling, double first tempering at 740-760° C, air or water cooling, second tempering at 580-680° C, air cooling	830 (85)	no more than 735 (75)		49 (5)
06HN28MDT	Hardening 950-1080 ° C, cooling in water	540 (55)	215 (22)
03Х18Н11	Tempering at 1080-1100° C, cooling in water or air	490 (50)	196 (20)
03Х17Н14М3	Tempering at 1080-1100° C, cooling in water or air	490 (50)	196 (20)	40	-

* For sheets with a thickness of more than 25 mm, mechanical properties are not standardized, the definition is mandatory.

Note. Annealing of sheets of steel grades 20X13, 12X13, 08X13 is carried out at the request of the consumer. Norms are not binding until 01.01.94. The definition is required for the data set.

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

Table 3

steel grade	Sample heat 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 COPU , J / cm 2 (kgf m / cm 2)
steel grade	Sample heat treatment mode	at least
14X17H2	Hardening at 960-1050° C, cooling in water or air, tempering at 275-350° C, air cooling	1080 (110)	885 (90)	10	-
09X16N4B	Hardening at 950-980 °C, cooling in air, tempering at 300-350° C, air cooling	1230 (125)	980 (100)	8	-
07X16H6	Normalization at (975± 10) ° C, cold treatment at - 70° From 2 o'clock, leave at (425± 10) ° From 1 h, 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 norms of mechanical properties.

(Revised edition, Rev. No. 2).

Table 4

Surface group	Group symbol	Material condition	Surface characteristic	Name of permissible surface defects	Maximum Defect Depth
1	H1 PN1	Hard-worked (N) and semi-hard-worked (PN)	Brilliant, without blisters, rolled bubbles, captivity, ripples, overetching, with a slight difference in shades	Scratches, nicks, prints, marks, rolled prints
2	M2a		Silver-matt or shiny, without blisters, rolled bubbles, captivity, cracks, scale and overtreatment	Ripple, scratches, nicks, prints, risks, rolled prints	Depth that does not lead the sheet beyond the limit deviations
2	M2b			Same with shells
3	M3a	a) Cold rolled, heat treated or annealed			1/2 the sum of the limit deviations in thickness
3	M3b	b) Hot rolled, heat treated, pickled or bright annealed		Same with shells	1/2 the sum of the limit deviations in thickness
4	M4a	a) Cold rolled, heat treated, pickled or bright annealed		Ripple, scratches, prints, nicks, scratches, rolled prints	Sum of limit deviations in thickness
4	M4b	b) Hot rolled, heat treated, pickled or bright annealed		Same with shells	Sum of limit deviations in thickness
5	M5a	a) Hot rolled, heat treated, pickled or bright annealed	Matte with a gray tint or shiny, without bubbles, swelling,	Ripple, scratches, prints, nicks, risks, small rolling films, rolled prints	Summarginalthickness deviations
	M5b	b) Hot rolled, heat treated, pickled or bright annealed	rolled bubbles, cracks, scale and overtreatment	Same with shells
	M5v	c) Cold rolled, heat treated	Dark	Ripple, scratches, prints, nicks, risks, small rolling films, rolled prints, scale
	M5g	d) Hot-rolled, heat-treated		Ripple, scratches, prints, nicks, risks, small rolling films, shells, rolled prints, scale
	5d	e) Hot-rolled, heat-treated and non-pickled		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 according to standards.

2. Local shallow cleaning of the surface is allowed, while the cleaning depth should not exceed the norms for the depth of occurrence of permissible defects. Arson from stripping is not allowed.

3. At the request of the consumer, sheets are produced without stripping and 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 rejection sign.

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

(Revised edition, Rev. 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) contamination of steel with non-metallic inclusions;

j) mechanical properties other than those indicated in Table. .

Note. Rules for subparagraphs b, V, d, e, and, h, And, To, as well as control methods for 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 COPU , J / cm 2 (kgf m / cm 2),at least

Heating up to 550° C, exposure 1 h, cooling with an oven at a speed of 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 request of the consumer, sheets are produced:

a) with checking the tendency to intergranular corrosion of steel grades 08X17T, 15X25T and 07X16H6;

b) with verification of internal defects by non-destructive methods. The norms 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 hardness of heat-treated sheets;

e) with a bend test.

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

4. ACCEPTANCE RULES

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

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

(Revised edition, Rev. No. 3).

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

results of testing the mechanical properties of hard-worked and semi-hard-worked sheets and sheets with a thickness of over 25 mm;

results of testing sheets of steel grades 03X22H6M2 and 03X23H6 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 surface control, non-flatness and dimensions.

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

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

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

to determine the tendency 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.

GOST 7350-77

INTERSTATE STANDARD

AND HEAT RESISTANT

TECHNICAL CONDITIONS

Official edition

Standartinform

INTERSTATE STANDARD

CORROSION-RESISTANT STEEL, 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

Introduction date 01.01.79

This standard applies to thick 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 subdivided:

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

cold-rolled, heat-treated, pickled or after bright annealing - М2а, МЗа, М4а, М5а,

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

pickled or after light annealing - M2b, M3b, M4b, M5b, hot-rolled heat-treated unetched - M5g, hot-rolled without heat treatment and unetched - 5d;

By rolling accuracy: increased accuracy - A, normal accuracy - B;

By type of edges: edged - O, unedged - BUT;

According to the deviation from flatness of sheets with a tensile strength 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 steel sheets with higher rolling accuracy than specified in the order.

Official publication N O

Reprint prohibited

2. ASSORTMENT

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

2.2. The shape, dimensions and maximum deviations in dimensions of steel plate must comply with the requirements:

For hot-rolled - GOST 19903;

For cold-rolled - 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.

Hot-rolled sheets of increased rolling accuracy A are produced at the request of the consumer.

(Revised edition, Rev. No. 2).

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

Notes:

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, the deviation from flatness is not standardized.

Legend Examples

Cold-rolled steel, heat-treated, pickled, thick plate, grade 12X18H10T, M2a of surface group, increased rolling accuracy, 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 plate, grade 20X13, MZb surface group, with unedged 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, 09X16H4B, 12X13, 14X17H2, 08X13, 12X17, 08X17T, 15X25T, 07X16H6, 09X17H7YU, 03X18H11, 03X17H14M3, 08X22 H6T, 12H21N5T, 08H21N6M2T, 20H23N13, 08H18G8N2T, 15H18N12S4TYU, 10H14G14N4T, 12H17G9AN4, 08H17N13M2T, 10H17N13M2T, 10X17H13M3T, 08X17H15MZT, 12X18H9, 17X18H9, 12X18H9T,

04X18H10, 08X18H10, 08X18H10T, 12X18H10T, 08X18H12T, 12X18H12T, 08X18H12B,

03X21H21M4GB, 03X22N6M2, 03X23H6, 20X23H18, 12X25H16G7AR, 06XH28MDT, 03XH28MDT, 15X5M.

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

3.1a. Plate steel is manufactured in accordance with the requirements of this standard according to the 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 15X5M, the chemical composition of which must comply with GOST 20072.

The chemical composition of steel grades 03X23H6 and 03X22H6M2 must comply with Table. 1a.

Table 1a

Notes:

1. A deviation in mass fraction is allowed in finished rolled products: silicon +0.4%, sulfur +0.005%, nickel +0.2%, chromium +0.5%.

2. In steel grade 03Kh22N6M2, an increase in the mass fraction of molybdenum + 0.2% is allowed.

3. The mass fraction of residual titanium is allowed not more than 0.05%, other residual elements - in accordance with GOST 5632.

(Revised edition, Rev. No. 2).

3.3. The sheets should not have any traces of a shrinkage cavity, delaminations, 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 ,
steel grade	Heat treatment mode
	Annealing at 840-870 °C, air cooling
	Normalization or quenching at 1000-1050°C, air cooling, tempering at 680-780°C, furnace or air cooling
	Annealing according to the manufacturer's mode	No more than 750 (76)
	Annealing or tempering at 650-700 °C	By agreement between the manufacturer and the consumer
	Annealing according to the manufacturer's mode	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 the manufacturer's mode	No more than 650 (66)

Continuation of the table. 2

steel grade	Heat treatment mode	Tensile strength o 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)
steel grade	Heat treatment mode
	Quenching at 960-1020 °C, cooling in water or air, tempering at 680-780 °C, cooling in air or with a furnace
	Annealing according to the manufacturer's mode	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
	Hardening at 1000-1050 °C, cooling in water
	Hardening 1030-1050 °C, cooling in water
	Hardening at 950-1050 °C, cooling in water or in air
	Hardening at (1050+25) °С, cooling in water
	Hardening at 1030-1050 °C, cooling in water
	Hardening at 1030-1120 °C, cooling in water
	Hardening at 1050-1080 °C, cooling in water or in air
	Hardening at 1030-1100 °C, cooling in water



08Х17Н15МЗТ*
	Hardening at 1080-1120 °C, cooling in water
	Hardening at 1050-1120 ° C, cooling in water or under a water shower
	Hardening at 1030-1080 °C, cooling in water or in air
	Hardening at 1050-1100 °C, cooling in water or in air
	Hardening at 1050-1100 °C, cooling in water or in air

The end of the table. 2

steel grade	Heat treatment mode	Tensile strength o 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)

	Hardening at 1000-1080 °C, cooling in water or in air
	Hardening at 1000-1080 °C, cooling in water or in air
	Hardening at 1030-1080 °C, cooling in water or in air
	Hardening at 1030-1080 °C, cooling in water or in air
	Hardening at 1000-1100 °C, cooling in water or in air
	Hardening at 1030-1130 °C, cooling in water
	Hardening at 1040-1080 °C, cooling in water
12X25N16G7AR*	Hardening at 1050-1150 °C, cooling in water or in air
15Х18Н12С4ТЮ*	Hardening at 1020-1050 °C, cooling in water or in air
	Normalization at (1040+10) °C, air cooling	No more than 1180 (120)	No more than 390 (40)
03X21H21M4GB*	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, cooling in air, two 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)
	Hardening 950-1080 °C, cooling in water

	Hardening at 1080-1100 °C, cooling in water or in air

* For sheets with a thickness of St. 25 mm mechanical properties are not standardized, the definition is mandatory. Note. Annealing of sheets of steel grades 20X13, 12X13, 08X13 is carried out at the request of the consumer. Norms are not binding until 01.01.94. The definition is required for the data set.

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

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

Table3

steel grade	Sample heat treatment mode	Tensile strength o 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) °С, cold treatment at -70 °С 2 h, tempering at (425+10) °С 1 h, 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 norms of mechanical properties.

(Revised edition, Rev. No. 2).

3.7. By the type and quality of the surface, the sheets must meet the requirements specified in Table. 4.

Conditional designation	Material condition	Characteristic surfaces
	Hard-worked (N) and semi-hard-worked (PN)	Shiny, without bubbles - in blistering, rolled bubbles, captivity, ripples, overgrazing, with a slight difference in shades	Scratches, nicks, prints, marks, rolled prints
		Silver-matt or shiny, without blisters, rolled bubbles, captivity, cracks, scale and overtreatment	Ripple, scratches, nicks, prints, risks, rolled prints	Depth that does not lead the sheet beyond the limit deviations
			Same with shells

The end of the table. 4

Conditional designation	Material condition	Characteristic surfaces	Name of permissible surface defects	Maximum Defect Depth
	a) Cold rolled, heat treated or annealed		Same with shells	1/2 the sum of the limit deviations in thickness
	b) Hot rolled, heat treated, pickled or bright annealed	Silver-matt or shiny, without blisters, rolled blisters, captivity, cracks, scale and overgrass	Same with shells	1/2 the sum of the limit deviations in thickness
	a) Cold rolled, heat treated, pickled or bright annealed		Ripple, scratches, prints, nicks, scratches, rolled prints
	b) Hot rolled, heat treated, pickled or bright annealed		Same with shells	The sum of limit deviations for thickness
	a) Hot rolled, heat treated, pickled or bright annealed	Matte with a gray tint or shiny, without bubbles - in blisters, rolled out bubbles	Ripple, scratches, prints, nicks, risks, small rolling films, rolled prints	The sum of limit deviations for thickness
	b) Hot rolled, heat treated, pickled or bright annealed	bubbles, cracks, scale and over-grass	Same with shells
	c) Cold rolled, heat treated		Ripple, scratches, prints, nicks, risks, small rolling films, rolled prints, scale
	d) Hot-rolled, heat-treated		Ripple, scratches, prints, nicks, risks, small rolled-
	e) Hot-rolled, heat-treated and non-pickled		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 according to standards.

2. Local shallow cleaning of the surface is allowed, while the cleaning depth should not exceed the norms for the depth of occurrence of permissible defects. Arson from stripping is not allowed.

3. At the request of the consumer, sheets are produced without stripping and 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 rejection sign.

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

(Revised edition, Rev. No. 2).

3.8. Sheets of steel grades 09X17H7Yu, 03X18H11, 03X17H14M3, 08X22H6T, 08X21H6M2T, 10X14G14H4T, 12X17G9AN4, 08X17H13M2T, 10X17H13M2T, 10X17H13M3T, 08X17H15MZT, 12X18H9, 12X18H9T, 04X18H10, 08X18H10, 08X18H10T, 12X18H10T, 08X18H12T, 12X18H12T, 08X18H12B, 08X18G8N2T, 03X 21N21M4GB, 03X22N6M2, 03Kh23N6, 06KhN28MDT, 03KhN28MDT should not be prone to intergranular corrosion.

Intergranular corrosion standards for steel grades 03X22H6M2 and 03X23H6 are not mandatory until 01.01.93. The definition is required for the data set.

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

3.9. At the request of the consumer, sheets are produced with rationing:

a) susceptibility to embrittlement of steel grade 12X21H5T. The heat treatment mode and norms must correspond to those indicated in Table. 5;

b) surface roughness of hard-worked and semi-hard-worked 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 is 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) contamination of steel with non-metallic inclusions;

j) mechanical properties other than those indicated in Table. 2.

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

3.10. At the request of the consumer, sheets are produced:

a) with checking the tendency to intergranular corrosion of steel grades 08X17T, 15X25T and 07X16H6;

b) with verification of internal defects by non-destructive methods. The 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 hardness of heat-treated sheets;

e) with a bend test.

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

4. ACCEPTANCE RULES

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

(Revised edition, Rev. No. 3).

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

Tests of the mechanical properties of hard-worked and semi-hard-worked sheets and sheets with a thickness of St. 25 mm;

Testing sheets of steel grades 03X22H6M2 and 03X23H6 for susceptibility to intergranular corrosion;

Checking sheets for internal defects;

Hardness control.

(Introduced additionally, Amendment No. 2).

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

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

4.3 To check the quality of the sheets, select:

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

To determine the tendency 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.

4.4. Upon receipt of unsatisfactory test results for at least one of the indicators, repeated tests are carried out on a sample selected according to GOST 7566.

5. TEST METHODS

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

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 the sheets are checked with a measuring tool that provides the necessary measurement accuracy.

5.4. Sampling and preparation of samples for mechanical testing is carried out according to GOST 7564 across the rolling direction, and for steel grade 09Kh17N7Yu - along the rolling direction.

From each control sheet select:

For tensile testing and determination of surface roughness - one sample each;

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

5.5. Tensile test at room temperature is carried out according to GOST 1497, at elevated temperature - 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. The surface roughness is determined in accordance with the requirements of GOST 2789 by a profilograph-profilometer according to 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. The test of steel for a tendency to intergranular corrosion is carried out according to GOST 6032.

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

The test of steel grades 03X23H6 and 03X22H6M2 for the tendency to intergranular corrosion is carried out according to the DU method according to GOST 6032.

Sheets of steel grade 03Kh22N6M2 are controlled in the hardened state, and steel grade 03Kh23N6 - in the state of hardening and subsequent tempering at 550 ° C for 1 hour.

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

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

Control is carried out visually on the edges of the sheets.

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

(Revised edition, Rev. No. 2).

5.12. To test the mechanical properties and the absence of a tendency to intergranular corrosion, it is allowed to use statistical methods control, approved in the prescribed manner.

5.13. The determination of hardness is carried out according to GOST 9012 on blanks for the manufacture of tensile specimens.

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

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

6. PACKAGING, LABELING, TRANSPORT AND STORAGE

6.1. Packing, marking, transportation and storage - in accordance with GOST 7566.

(Revised edition, Rev. No. 2).

6.2. (Deleted, Rev. No. 2).

6.3. When packing sheets in packs, each pack must consist of sheets of one batch. It is allowed to pack sheets of different batches made from the same melt into one bundle. In this case, the parties must be separated by spacers. It is allowed to tie packs of hot-rolled non-etched 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 sheets into packs during transportation. Instead of marking the top sheet of the pack, it is allowed to mark on a metal card with a size of at least 200x290 mm, firmly attached at least in two places to the packing tape on the top of the pack.

APPLICATION. (Deleted, Rev. No. 1).

INFORMATION DATA

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

2. APPROVED AND INTRODUCED BY Decree of the State Committee for 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 REGULATIONS 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 limitation of the validity period was removed according to the 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 12/15/2009. Format 60x84 V g . Offset paper. Headset Times. Offset printing. Uel. oven l. 1.40. Uch.-ed. l. 1.20. Circulation 79 copies. Zach. 696.

FSUE "STANDARTINFORM", 123995 Moscow, Granatny per., 4. Typed at the Kaluga Standards Printing House.

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