GOST 7350-77
GOST 7350-77
INTERSTATE STANDARD
THICK SHEET STEEL
CORROSION RESISTANT, HEAT RESISTANT
AND HEAT RESISTANT
TECHNICAL SPECIFICATIONS
Official edition
UDC 669.14-413:006.354 Group B33
INTERSTATE STANDARD
THICK SHEET STEELCORROSION RESISTANT, HEAT RESISTANTAND HEAT RESISTANTTechnical conditionsPlate steel, corrosion-resistant, heat-resistant and high-temperature. Specifications ISS 77.140.20 OKP 09 8500, 09 8600 |
GOST |
Date of introduction 01.01.79
This standard applies to thick-sheet, 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, work-hardened - H1,
cold rolled semi-hardened - PN1,
cold rolled, heat treated, pickled or bright annealed - 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-pickled - M5g,
hot rolled without heat treatment and not pickled - 5d;
- by rolling accuracy:
high precision - A,
normal accuracy - B;
- according to the type of edges:
trimmed - Oh,
unedged - NO;
- for deviation from flatness of sheets with tensile strength of 690 N/mm² (70 kgf/mm²) and less by:
particularly high flatness - PO,
high flatness - PV,
improved flatness - PU,
normal flatness - PN.
(Changed edition, Amendment No. 2).
1.2 It is permitted to manufacture thick sheet steel with a rolling accuracy higher than that specified in the order.
Official publication Reproduction prohibited
BUT
© Publishing House of Standards, 1997
© STANDARTINFORM, 2009
GOST 7350-77 P. 2
2. ASSORTMENT
2.1. Hot rolled thick sheet 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 thick sheet steel 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 manufactured by agreement between the manufacturer and the consumer.
Hot rolled sheets of increased rolling precision A are manufactured according to customer requirements.
(Changed edition, Amendment No. 2).
2.3. The deviation of sheets from flatness must correspond to that specified in Table 1.
Table 1
| Tensile strength, N/mm² (kgf/mm²) | Deviation of sheets from flatness per 1 m of length, mm | |
| hot rolled | cold rolled | |
| Up to 690 (70) incl. | According to GOST 19903 (PO, PV, PU, PN) | According to GOST 19904 (PO, PV, PU, PN) |
| Over 690 to 830 (over 70 to 85) incl. | 15 | 25 |
| St. 830 (85) | 25 | By agreement between the manufacturer and the consumer |
Notes:
1. At the customer's request, hot-rolled sheets with a thickness of 4-5 mm are manufactured with particularly high flatness (PO), with a thickness of 6 mm and 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 manufactured 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 condition without etching, deviation from flatness is not standardized.
Examples of symbols
Cold-rolled steel, heat-treated, pickled, thick sheet, grade 12X18N10T, surface group M2a, high rolling accuracy, with cut edge, improved flatness, size 5×1250×2500 mm:
Sheet
The same, hot-rolled, heat-treated, pickled, thick sheet, grade 20X13, surface group M3b, with unedged edge, normal flatness, size 40×1400×3000 mm:
Sheet
(Changed edition, Amendment No. 2, 3).
3. TECHNICAL REQUIREMENTS
3.1. Thick sheet steel is produced in the following grades: 20X13, 09X16N4B, 12X13, 14X17N2, 08X13, 12X17, 08X17T, 15X25T, 07X16N6, 09X17N7U, 03X18N11, 03X17N14M3, 08X22N6T, 12X21N5T, 08X21N6M2T, 20X23N13, 08X18G8N2T, 15X18N12S4TYU, 10X14G14N4T, 12X17G9AN4, 08X17N13M2T, 10X17N13M2T, 10Х17Н13М3Т, 08Х17Н15М3Т, 12Х18Н9, 17Х18Н9, 12Х18Н9Т,
P. 3 GOST 7350-77
04Х18Н10, 08Х18Н10, 08Х18Н10Т, 12Х18Н10Т, 08Х18Н12Т, 12Х18Н12Т, 08Х18Н12Б, 03Х21Н21М4ГБ, 03Х22Н6М2, 03Х23Н6, 20Х23Н18, 12Х25Н16Г7AR, 06ХН28МДТ, 03ХН28МДТ, 15Х5М.
(Changed edition, Amendment No. 2, 3).
3.1a. Thick sheet steel is manufactured in accordance with the requirements of this standard according to the technological regulations approved in the established manner.
(Additionally introduced, Amendment No. 2).
3.2. The chemical composition of all grades of steel - according to GOST 5632, except for steel grade 15X5M, the chemical composition of which must comply with GOST 20072.
The chemical composition of steel grades 03X23N6 and 03X22N6M2 must correspond to Table 1a.
Table 1a
| Steel grade | Mass fraction of elements, % | |||||||
| Carbon | Silicon | Sulfur | Phosphorus | Manganese | Chromium | Nickel | Molybdenum | |
| 03Х23Н6 | 0.03 | 0.4 | 0.02 | 0.035 | 1.0 - 2.0 | 22.0 - 24.0 | 5.6 - 6.3 | - |
| 03Х22Н6М2 | 0.03 | 0.4 | 0.02 | 0.035 | 1.0 - 2.0 | 21.0 - 23.0 | 5.5 - 6.5 | 1.8 - 2.5 |
Notes:
1. The following deviations in the mass fraction are allowed in the finished rolled product: silicon +0.4%, sulfur +0.005%, nickel ±0.2%, chromium +0.5%.
2. In steel grade 03X22N6M2, an increase in the mass fraction of molybdenum of +0.2% is allowed.
3. The mass fraction of residual titanium is allowed to be no more than 0.05%, other residual elements - according to GOST 5632.
(Changed edition, Amendment No. 2).
3.3. The sheets must not contain any signs of shrinkage cavities, delamination, foreign inclusions or 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 | Temporary resist- σ in , N/mm² (kgf/mm²) |
Yield strength σ t , N/mm² (kgf/mm²) |
Relate- body lengthening- niye δ 5 , % |
Impact strength, KCU, J/cm² (kgf m/cm²) |
| not less than | |||||
| 15X5M | Annealing at 840-870 °C, air cooling | 470 (48) | 235 (24) | 18 | - |
| 20X13 | Normalization or hardening at 1000-1050 °C, air cooling, tempering at 680-780 °C, furnace or air cooling | 510 (52) | 375 (38) | 20 | |
| Annealing according to the manufacturer's regime | Not more than 750 (76) | ||||
| 14Х17Н2* | Annealing or tempering at 650-700 °C | By agreement between the manufacturer and the consumer | |||
| 09Х16Н4Б | Annealing according to the manufacturer's regime | Not more than 1030 (105) | - | 13 | - |
| 12X13 | Quenching at 960-1020 °C, air cooling, tempering at 680-780 °C, air or furnace cooling | 490 (50) | 345 (35) | 21 | |
| Annealing according to the manufacturer's regime | Not more than 650 (66) | 250 (25) | 15 | ||
GOST 7350-77 P. 4
Continuation of table 2
| Steel grade | Heat treatment mode | Temporary resist- σ in , N/mm² (kgf/mm²) |
Yield strength σ t , N/mm² (kgf/mm²) |
Relate- body lengthening- niye δ 5 , % |
Impact strength, KCU, J/cm² (kgf m/cm²) |
| not less than | |||||
| 08X13 | Quenching at 960-1020 °C, cooling in water or air, tempering at 680-780 °C, cooling in air or with a furnace | 420 (43) | 295 (30) | 23 | - |
| Annealing according to the manufacturer's regime | Not more than 650 (66) | 250 (25) | 15 | ||
| 12X17* | Annealing or tempering at 760-780 °C, air or furnace cooling | 440 (45) | - | 18 | |
| 08Х17Т* | Annealing or tempering at 760-780 °C, air cooling | ||||
| 15X25T* | Annealing or tempering at 740-780 °C, cooling in water | 14 | 20 (2) | ||
| 08Х22Н6Т | Quenching at 1000-1050 °C, cooling in water | 590 (60) | 345 (35) | 18 | 59 (6) |
| 03Х23Н6 | Quenching at 1030-1050 °C, cooling in water | 25 | - | ||
| 12Х21Н5Т* | Quenching at 950-1050 °C, cooling in water or air | 690 (70) | 390 (40) | 14 | |
| 08Х21Н6М2Т | Quenching at (1050±25) °C, cooling in water | 590 (60) | 345 (35) | 20 | 59 (6) |
| 03Х22Н6М2 | Quenching at 1030-1050 °C, cooling in water | 25 | - | ||
| 20Х23Н13* | Quenching at 1030-1120 °C, cooling in water | 570 (58) | - | 35 | |
| 10Х14Г14Н4Т | Quenching at 1050-1080 °C, cooling in water or air | 590 (60) | 245 (25) | 40 | |
| 12Х17Г9АН4* | 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) | 37 | |
| 08Х17Н13М2Т | 510 (52) | 196 (20) | 40 | ||
| 10Х17Н13М3Т | 530 (54) | 235 (24) | 37 | ||
| 08Х17Н15М3Т* | 510 (52) | 196 (20) | 40 | ||
| 17Х18Н9 | Quenching at 1080-1120 °C, cooling in water | 590 (60) | 265 (27) | 35 | |
| 12Х18Н9 | Quenching at 1050-1120 °C, cooling in water or under a water shower | 530 (54) | 215 (22) | 38 | |
| 12Х18Н9Т | Quenching at 1030-1080 °C, cooling in water or air | ||||
| 08Х18Н10 | Quenching at 1050-1100 °C, cooling in water or air | 510 (52) | 205 (21) | 43 | |
| 04Х18Н10 | 490 (50) | 175 (18) | 45 | ||
P. 5 GOST 7350-77
End of table. 2
| Steel grade | Heat treatment mode | Temporary resist- σ in , N/mm² (kgf/mm²) |
Yield strength σ t , N/mm² (kgf/mm²) |
Relate- body lengthening- niye δ 5 , % |
Impact strength, KCU, J/cm² (kgf m/cm²) |
|
| not less than | ||||||
| 12Х18Н10Т | Quenching at 1000-1080 °C, cooling in water or air | 530 (54) | 235 (24) | 38 | - | |
| 08Х18Н10Т | 510 (52) | 205 (21) | 43 | |||
| 12X18N12T | Quenching at 1030-1080 °C, cooling in water or air | 530 (54) | 235 (24) | 38 | ||
| 08Х18Н12Т | Quenching at 1030-1080 °C, cooling in water or air | 510 (52) | 205 (21) | 43 | ||
| 08Х18Н12Б | Quenching at 1000-1100 °C, cooling in water or air | 40 | ||||
| 20Х23Н18 | Quenching at 1030-1130 °C, cooling in water | 540 (55) | 265 (27) | 35 | ||
| 03ХН28МДТ* | Quenching at 1040-1080 °C, cooling in water | 215 (22) | ||||
| 12Х25Н16Г7АР* | Quenching at 1050-1150 °C, cooling in water or air | 740 (75) | 390 (40) | 50 | ||
| 15Х18Н12С4ТЮ* | Quenching at 1020-1050 °C, cooling in water or air | 690-930 (70-95) |
345 (35) | 30 | ||
| 07Х16Н6 | Normalization at (1040±10) °C, air cooling | Not more than 1180 (120) | No more than 390 (40) | 15 | ||
| 03Х21Н21М4ГБ* | Quenching at 1060-1120 °C, cooling in water or under a water shower | 590 (60) | 295 (30) | 30 | ||
| 08Х18Г8Н2Т | Quenching at 980-1020 °C, cooling in water or under a water shower | 345 (35) | 20 | 59 (6) | ||
| 09Х17Н7Ю | Quenching 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) | |
| 06ХН28МДТ | Quenching at 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 | |||||
* For sheets with a thickness of over 25 mm, mechanical properties are not standardized; determination is mandatory.
Note. Annealing of sheets of steel grades 20X13, 12X13, 08X13 is carried out at the customer's request. Standards are not mandatory until 01.01.94. Definition is mandatory for the data set.
(Changed edition, Amendment No. 2,3).
GOST 7350-77 P. 6
3.5. The mechanical properties of sheets, determined on control heat-treated samples, must comply with the standards specified in Table 3.
Table 3
| Steel grade | Heat treatment mode of samples | Temporary resist- σ in , N/mm² (kgf/mm²) |
Yield strength σ t , N/mm² (kgf/mm²) |
Relate- body lengthening- niye δ 5 , % |
Impact strength, KCU, J/cm² (kgf m/cm²) | |
| not less than | ||||||
| 14Х17Н2 | Quenching at 960-1050 °C, cooling in water or air, tempering at 275-350 °C, cooling in air | 1080 (110) | 885 (90) | 10 | - | |
| 09Х16Н4Б | Quenching at 950-980 °C, air cooling, tempering at 300-350 °C, air cooling | 1230 (125) | 980 (100) | 8 | ||
| 07Х16Н6 | Normalization at (975±10) °C, cold treatment at -70 °C for 2 h, tempering at (425±10) °C 1 hour, air cooling |
1080 (110) | 835 (85) | 10 | ||
Note: By agreement between the manufacturer and the consumer, it is permissible to change the heat treatment mode with a corresponding change in the mechanical property standards.
(Changed edition, Amendment No. 2).
3.6. Mechanical properties of cold-worked and semi-cold-worked sheets are not standardized, but are determined without fail. Standards are established by agreement between the manufacturer and the consumer.
3.7. In terms of appearance and surface quality, the sheets must meet the requirements specified in Table 4.
Table 4
Group believe- hnosti |
Conventional designation of the group | Material condition | Surface characteristics | Name of permissible surface defects | Maximum depth of defects |
| 1 | H1 PN1 | Hardened (H) and semi-hardened (PN) | Shiny, without bubbles, bulges, rolled bubbles, film, ripples, overetching, with a slight difference in shades | Scratches, nicks, marks, scratches, rolled marks | ½ of the sum of the maximum deviations in thickness |
| 2 | M2a | a) Cold rolled, heat treated, pickled or bright annealed | Silvery-matte or shiny, without bubbles, rolled bubbles, film, cracks, scale and overetching | Ripples, scratches, nicks, marks, risks, rolled marks The same goes for shells. |
Depth that does not take the sheet beyond the maximum deviations |
| M2b | b) Hot rolled. heat treated, pickled or bright annealed |
P. 7 GOST 7350-77
End of table. 4
Group believe- hnosti |
Conventional designation of the group | Material condition | Surface characteristics | Name of permissible surface defects | Maximum depth of defects |
| 3 | M3a | a) Cold rolled, heat treated or annealed | Silvery-matte or shiny, without bubbles, rolled bubbles, film, cracks, scale and overetching | Ripples, scratches, marks, nicks, risks, rolled marks The same goes for shells. |
½ of the sum of the maximum deviations in thickness |
| M3b | b) Hot rolled. heat treated, pickled or bright annealed | ||||
| 4 | M4a | a) Cold rolled, heat treated, pickled or bright annealed | Ripples, scratches, marks, nicks, risks, rolled marks The same goes for shells. |
Sum of maximum deviations in thickness | |
| M4b | b) Hot rolled. heat treated, pickled or bright annealed | ||||
| 5 | M5a | a) Hot rolled. heat treated, pickled or bright annealed |
Matte with a gray tint or shiny, without bubbles, rolled bubbles, cracks, scale and overetching | Ripples, scratches, marks, nicks, risks, small rolling films, rolled out marks The same goes for shells. | |
| M5b | b) Hot rolled. heat treated, pickled or bright annealed | ||||
| M5v | c) Cold rolled, heat treated | Dark | Ripples, scratches, marks, nicks, risks, small rolling films, rolled marks, scale | ||
| M5g | d) Hot rolled. heat treated |
Ripples, scratches, marks, nicks, risks, small rolling films, cavities, rolled prints, scale | |||
| 5d | d) Hot rolled. unheat treated and unetched |
Notes:
1. Requirements for the quality of the surface of heat-treated steel in terms of the number and nature of defects may be specified by agreement of the parties using standards.
2. Local shallow cleaning of the surface is allowed, but the depth of cleaning should not exceed the depth standards of acceptable defects. Burns from cleaning are not allowed.
3. At the customer's request, sheets are manufactured without stripping or cutting out unacceptable defects.
4. Temper colours and various shades from etching on cold-rolled and hot-rolled heat-treated sheets, etched or after bright annealing, are not a rejection feature.
5. Welding of defects on sheets is permitted by agreement with the consumer.
(Changed edition, Amendment No. 2).
GOST 7350-77 P. 8
3.8. Sheets made of steel grades 09Х17Н7Ю, 03Х18Н11, 03Х17Н14М3, 08Х22Н6Т, 08Х21Н6М2Т, 10Х14Г14Н4Т, 12Х17Г9АН4, 08Х17Н13М2Т, 10Х17Н13М2Т, 10Х17Н13М3Т, 08Х17Н15М3Т, 12Х18Н9, 12Х18Н9Т, 04Х18Н10, 08Х18Н10, 08Х18Н10Т, 12Х18Н10Т, 08Х18Н12Т, 12Х18Н12Т, 08Х18Н12Б, 08Х18Г8Н2Т, 03Х21Н21М4ГБ, 03Х22Н6М2, 03Х23Н6, 06ХН28МДТ, 03ХН28МДТ should not have a tendency to intercrystalline corrosion.
The intercrystalline 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, Amendment No. 2, 3).
3.9. At the customer's request, sheets are manufactured with standardization:
a) the tendency of 12X21N5T steel to embrittlement. The heat treatment mode and standards must correspond to those specified in Table 5;
b) surface roughness of hardened and semi-hardened steel;
c) alpha phases in austenitic steels;
d) tendency to intercrystalline corrosion for steel grades not specified in GOST 6032;
d) impact toughness of steels for which impact toughness is not indicated in Table 2;
e) grain size;
g) mechanical properties of hot-rolled sheets supplied without heat treatment and pickling;
c) mechanical properties at elevated temperatures;
i) contamination of steel with non-metallic inclusions;
k) mechanical properties other than those specified in Table 2.
Note. Standards for subparagraphs b, c, d - k, as well as control methods for subparagraphs c, d are established by agreement between the manufacturer and the consumer.
Table 5
| Heat treatment mode | Sheet thickness, mm | Sample type | Impact strength, KCU, J/cm² (kgf m/cm²), not less than |
| Heating to 550 °C, holding for 1 hour, cooling with a furnace at a rate of 100 °C/h to 300 °C, then cooling in air | Up to 10 | VIII according to GOST 6996 | 39 (4.0) |
| St. 10 | I according to GOST 9454 | 29 (3.0) |
3.10. At the customer's request, sheets are manufactured:
a) with testing of the susceptibility to intercrystalline corrosion of steel grades 08X17T, 15X25T and 07X16N6;
b) with testing of internal defects by 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;
d) with bending test.
(Changed edition, Amendment No. 2, 3)
4. ACCEPTANCE RULES
4.1. Sheet steel is accepted in batches. A batch must consist of metal from the same melt, the same material condition, the same thickness, and for heat-treated steel - the same heat treatment mode. Sheets differing in thickness by no more than 40% for sheets 4 to 12 mm thick, and by no more than 5 mm for sheets over 12 mm thick may be combined into one batch.
By agreement between the manufacturer and the consumer, batches consisting of several melts of the same grade or one melt of sheets of different thicknesses are permitted.
(Changed edition, Amendment No. 3).
P. 9 GOST 7350-77
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 work-hardened and semi-work-hardened sheets and sheets with a thickness of over 25 mm;
- testing sheets made of steel grades 03X22N6M2 and 03X23N6 for susceptibility to intercrystalline corrosion;
- checking sheets for internal defects;
- hardness control.
(Additionally introduced, Amendment No. 2).
4.2. All sheets in a batch are subject to surface, flatness and dimensional control.
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 the 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 intercrystalline 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 mechanical properties, susceptibility to intercrystalline corrosion, contamination with non-metallic inclusions and grain size, it is permissible to select the sheet of the greatest thickness from a batch consisting of sheets of different thicknesses and the same heat treatment regime.
4.4. If unsatisfactory test results are obtained for at least one of the indicators, repeat tests are carried out on a sample selected in accordance with GOST 7566.
5. TEST METHODS
5.1. Sampling for determination of 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 surface quality 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 the sheets are checked with a measuring instrument that ensures the required measurement accuracy.
5.4. The selection and preparation of samples for mechanical testing is carried out in accordance with GOST 7564 across the rolling direction, and for steel grade 09Kh17N7Yu - along the rolling direction.
From each control sheet the following is selected:
- for tensile testing and determination of surface roughness - one sample each;
- to determine impact strength and grain size - two samples.
5.5. Tensile testing at room temperature is carried out in accordance with GOST 1497, at elevated temperature - in accordance with GOST 9651 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 GOST 9454 on type 1 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.
(Changed edition, Amendment 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. Testing of steel for susceptibility to intercrystalline corrosion is carried out in accordance with GOST 6032.
Sheets without heat treatment are not tested for susceptibility to intercrystalline corrosion.
If unsatisfactory test results are obtained using the AMU and VU methods, by agreement between the manufacturer and the consumer, repeated tests may be carried out using the B method.
GOST 7350-77 P. 10
Testing of steel grades 03X23N6 and 03X22N6M2 for susceptibility to intercrystalline corrosion is carried out using the DU method in accordance with GOST 6032.
Sheets of steel grade 03X22N6M2 are tested in the hardened state, and those of steel grade 03X23N6 are tested in the hardened state and subsequently tempered at 550 °C for 1 hour.
(Changed edition, Amendment No. 1, 2).
5.11. The absence of internal defects in sheets, as specified in paragraph 3.3, is ensured 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 in accordance with regulatory and technical documentation (RTD).
(Changed edition, Amendment No. 2).
5.12. To test mechanical properties and the absence of a tendency to intercrystalline corrosion, it is permissible to use statistical control methods approved in the established manner.
5.13. Hardness determination is carried out according to GOST 9012 on blanks for the production of tensile samples.
5.14. The bending test is carried out in accordance with GOST 14019.
5.13, 5.14. (Introduced additionally, Amendment No. 2).
6. PACKAGING, MARKING, TRANSPORTATION AND STORAGE
6.1. Packaging, marking, transportation and storage - according to GOST 7566.
(Changed edition, Amendment No. 2).
6.2. (Excluded, Amendment No. 2).
6.3. When packing sheets into bundles, each bundle must consist of sheets from the same batch. It is allowed to pack sheets from different batches made from the same heat into one bundle. In this case, the batches must be separated by spacers. It is allowed to strap bundles of hot-rolled unetched sheets with transverse strapping in an amount equal to the sum of the longitudinal and transverse strapping provided for by GOST 7566. In this case, there must be no shifting of sheets in bundles during transportation. Instead of marking the top sheet of the bundle, it is allowed to apply marking to a metal card of at least 200×290 mm in size, securely attached in at least two places to the packing tape on the top of the bundle.
APPENDIX. (Deleted, Amendment No. 1).
P. 11 GOST 7350-77
INFORMATION DATA
- DEVELOPED AND SUBMITTED BY the USSR Ministry of Ferrous Metallurgy
- APPROVED AND PUT INTO EFFECT by the Resolution of the State Committee for Standards of the Council of Ministers of the USSR dated 21.07.77 No. 1786
- INTRODUCED FOR THE FIRST TIME
- The standard fully complies with ST SEV 6434-88
- REFERENCE REGULATORY AND TECHNICAL DOCUMENTS
| Designation of the NTD to which the reference is given | Item number | Designation of the NTD to which the reference is given | Item number |
GOST 1497-84 GOST 1778-70 GOST 2789-73 GOST 5632-72 GOST 5639-82 GOST 6032-2003 GOST 6996-66 GOST 7564-97 GOST 7565-81 GOST 7566-94 GOST 9012-59 GOST 9454-78 GOST 9651-84 GOST 12344-2003 GOST 12345-2001 GOST 12346-78 GOST 12347-77 GOST 12348-78 GOST 12349-83 GOST 12350-78 GOST 12351-2003 |
5.5 4.3, 5.8 5.7 3.2 5.9 3.9, 4.3, 5.10 3.9 5.4 4.3, 5.1 4.1.1, 4.4, 6.1, 6.3 5.13 3.9, 5.6 5.5 5.1 5.1 5.1 5.1 5.1 5.1 5.1 5.1 |
GOST 12352-81 GOST 12353-78 GOST 12354-81 GOST 12355-78 GOST 12356-81 GOST 12357-84 GOST 12358-2002 GOST 12359-99 GOST 12360-82 GOST 12361-2002 GOST 12362-79 GOST 12363-79 GOST 12364-84 GOST 12365-84 GOST 14019-2003 GOST 19300-86 GOST 19903-74 GOST 19904-90 GOST 20072-74 GOST 28473-90 |
5.1 5.1 5.1 5.1 5.1 5.1 5.1 5.1 5.1 5.1 5.1 5.1 5.1 5.1 5.14 5.7 2.2, 2.3, 5.3 2.2, 2.3, 5.3 3.2 5.1 |
- The validity period limitation was lifted according to protocol No. 3-93 of the Interstate Council for Standardization, Metrology and Certification (IUS 5-6-93)
- EDITION (November 2009) with Amendments No. 1, 2, 3, approved in November 1987, June 1988, October 1989 (IUS 2-88, 11-88, 2-90)
