Appendix A (mandatory). Sheet steel
Notes1 It is allowed to use steel grades 15 and 20 (GOST 1577) under the same conditions as steel grades 16K, 18K and 20K, while the scope and types of tests of these steels at the vessel manufacturer must be carried out in accordance with GOST 5520 to the same extent , as for steel grades 15K, 16K, 18K and 20K of the corresponding categories.
2 Sheet thickness - no more than 16 mm.
3 For tube sheets, as well as parts of internal devices and other non-critical structures.
4 Thickness restrictions: for steel grades St3sp and St3ps of the 3rd category - no more than 40 mm, for steel grades St3sp and St3ps of the 4th and 5th categories - no more than 25 mm, for steel grade St3Gps - no more than 30 mm .
5 The mechanical properties of sheets in accordance with GOST 5520 with a thickness of less than 12 mm are checked on sheets taken from the batch.
6 It is allowed to use steel grades St5ps2 and St5sp2 for parts that are not subject to welding, with the same parameters as steel grade St4sp3, with impact bending testing at the manufacturer of vessels or their individual parts.
7 Gaskets with a thickness of no more than 2 mm may be used at ambient temperatures down to minus 70 °C.
8 For vessels made of steel grade 10G2S1 operating under pressure, the wall temperature must not be lower than minus 60 °C.
9 For sheet thicknesses of more than 60 mm and less than 12 mm, steel of the 12th category is used.
10 It is allowed to use steel grade 10G2 (GOST 1577) at wall temperatures from minus 70 °C to minus 40 °C with the technical requirements for steel grade 09G2S in this temperature range.
11 The mechanical aging test is carried out if, during the manufacture of vessels with a wall temperature above 200 °C, the steel is subjected to cold deformation (rolling, bending, flanging, etc.).
12 For steel grades 16K, 18K, 20K, testing at a temperature of minus 20 °C is carried out at a metallurgical plant. Impact strength not less than 30 J/cm2.
13 When sheet thickness is less than 5 mm, it is allowed to use steels in accordance with GOST 14637 category 2 instead of steels of categories 3 and 4. When the sheet thickness is less than 7 mm, it is allowed to use steels in accordance with GOST 14637 of categories 3 and 4 instead of categories 5 and 6, respectively.
14 Sheets should be supplied with mandatory compliance with the requirements of GOST 19281 (clauses 2.2.1, 2.2.2, 2.2.3, 2.2.7, 2.2.9, 2.2.12), and macrostructure control should also be carried out according to GOST 5520 from a batch of sheets.
15 Sheets supplied in accordance with GOST 19281 and TU 14-1-5241 [40] must be tested sheet by sheet at a wall temperature below minus 30 °C, above 200 °C or at a pressure of more than 5 MPa with a sheet thickness of at least 12 mm.
16 When sheet thickness is less than 5 mm, it is allowed to use steels in accordance with GOST 5520 category 2 instead of steel categories 3 - 17. When the sheet thickness is less than 7 mm, it is allowed to use steels according to GOST 5520 category 3 instead of category 18, category 6 instead of categories 12 and 17.
17 It is allowed to use steel grades 16K, 18K, 20K according to GOST 5520 of the 10th category instead of the 18th category; steel grades 16GS, 09G2S according to GOST 5520 of the 12th - 15th categories (depending on the wall temperature, if it is below 0 °C) instead of steel of the 17th category.
18 It is allowed to use steel in accordance with GOST 7350 with a surface quality of group M3b and M4b, provided that when calculating strength, the depth of defects and minus deviations must be taken into account.
19 For environments that do not cause intergranular corrosion.
20 For products up to 12 mm thick.
21 For the manufacture of parts that are not subject to welding.
22 Steel must be ordered in accordance with the requirements of 5.2.3.
23 When ordering rolled products with a thickness of up to 32 mm inclusive, the strength class must be 325, 345; with a thickness of more than 32 mm, the strength class is 265, 295.
24 For internal parts of vessels that are not subject to welding, the use of steel grade 08X13 (GOST 5632) is allowed at a wall temperature from minus 60 °C to 550 °C.
25 Sheet carbon steel grade St3sp (GOST 380) with a thickness of more than 25 mm and steel grade St3Gps (GOST 380) with a thickness of more than 30 mm may be used in accordance with the parameters provided for in this appendix, subject to impact bending testing of the material at the vessel manufacturer or their elements. The impact bending test should be carried out on three specimens.
In this case, the impact strength of KCU must be no less than:
50 J/cm2 at a temperature of 20 °C;
30 J/cm2 at a temperature of minus 20 °C and after mechanical aging, and on one sample an impact strength of at least 25 J/cm2 is allowed.
26 Steel grade St3ps of categories 3, 4, 5 with a thickness of more than 12 mm to 25 mm may be used for vessels with a volume of no more than 50 m3, and a thickness of no more than 12 mm on a par with steel St3sp (GOST 380) of the corresponding category.
27 For each heat a factor is determined
J = (Si + Mn) ∙ (P + Sn) ∙ 104 < 100,
where the concentration of elements is indicated in %.
Hot rolled sheet: characteristics
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Hot rolled sheet steel. GOST 19903-74 Hot-rolled sheets with a width of 500 mm or more, produced in sheets with a thickness of 0.40 to 160 mm and rolls with a thickness of 1.2 to 12 mm.
Also in our catalog are hot-rolled steel sheets - the price of which is lower than that of competitors. Hot rolled sheet is divided into:
- in terms of rolling accuracy for thicknesses up to 12 mm:
- increased accuracy - A,
- normal accuracy - B;
- by flatness:
- especially high flatness - software,
- high flatness - PV,
- improved flatness - PU,
- normal flatness - PN;
- by the nature of the edge:
- with unedged edge - BUT,
- with cut edge - O;
- by size:
Maximum deviations of hot-rolled sheets with trimmed edges supplied in rolls should not exceed: +2 mm - with a width of 500 to 1000 mm; +5 mm - with a width of St. 1000 to 1600 mm; +7 mm - with a width of St. 1600 mm. Hot-rolled sheets with trimmed edges supplied in sheets should not exceed: +6 mm - with a width of up to 800 mm; +10 mm - with a width of St. 800 mm. Hot-rolled sheet with unedged edge should not exceed +20 mm. Maximum deviations along the length of a hot-rolled sheet, rolled sheet by sheet, should not exceed: +10 mm - for sheet lengths up to 1500 mm; +15 mm - with a sheet length of St. 1500 mm. on continuous mills and cut into sheets, should not exceed: +15 mm - for sheet lengths up to 1500 mm; +10 mm - at the consumer’s request; +20 mm - for sheet lengths over 1500 to 3000 mm; +25 mm - for sheet lengths over 3000 mm. At the request of the consumer, rolled sheets are manufactured with the following maximum deviations in length: +5 mm - for sheet lengths up to 1500 mm; +6 mm - with a sheet length of St. 1500 to 2000 mm; +10 mm - with a sheet length of St. 2000 to 3000 mm; +20 mm - with a sheet length of St. 3000 mm. Hot rolled sheets supplied in sheets with cut edges must be cut at right angles. The oblique cut and crescent shape should not take the sheets beyond the nominal size. Weight per square meter of sheet (GOST 19903-74 and 19904-90)
| Thickness S, mm | Weight of 1m2 sheet, kg |
| 0,5 | 3,925 |
| 0,6 | 4,710 |
| 0,7 | 5,495 |
| 0,8 | 6,280 |
| 0,9 | 7,065 |
| 1,0 | 7,850 |
| 1,2 | 9,420 |
| 1,4 | 10,990 |
| 1,5 | 11,775 |
| 1,7 | 13,345 |
| 1,8 | 14,130 |
| 1,9 | 14,915 |
| 2,0 | 15,700 |
| 2,5 | 19,625 |
| 3,0 | 23,550 |
| 3,5 | 27,475 |
| 4,0 | 31,400 |
| 5,0 | 39,250 |
| 6,0 | 47,100 |
| 7,0 | 54,950 |
| 8,0 | 62,800 |
| 9,0 | 70,650 |
| 10,0 | 78,500 |
| 12,0 | 94,200 |
| 14,0 | 109,900 |
| 16,0 | 125,600 |
| 18,0 | 141,300 |
| Weight of 1m2 sheet, kg | |
| 20,0 | 157,000 |
| 22,0 | 172,700 |
| 25,0 | 196,250 |
| 30,0 | 235,500 |
| 35,0 | 274,750 |
| 40,0 | 314,000 |
| 45,0 | 353,250 |
| 50,0 | 392,500 |
| 55,0 | 431,750 |
| 60,0 | 471,000 |
| 65,0 | 510,250 |
| 70,0 | 549,500 |
| 75,0 | 588,750 |
| 80,0 | 628,000 |
| 90,0 | 706,500 |
| 100,0 | 785,000 |
| 110,0 | 863,500 |
| 120,0 | 942,000 |
| 130,0 | 1020,500 |
| 140,0 | 1099,000 |
| 150,0 | 1177,500 |
| 160,0 | 1256,000 |
| 170,0 | 1334,500 |
| 180,0 | 1413,000 |
| 190,0 | 1491,500 |
| 200,0 | 1570,000 |
Hot-rolled sheet for general purpose GOST 103-76 Hot-rolled sheet for general purpose and steel strip for nuts with a width of 11 to 200 mm and a thickness of 4 to 60 mm corresponds to GOST 103-76. According to rolling accuracy, hot-rolled sheets are manufactured:
- Increased strength;
- Normal accuracy.
Hot rolled sheets are made in length:
- from 3 to 10 m - from carbon steel of ordinary quality, low-alloy and phosphorous;
- from 2 to 6 m - made of high-quality carbon and alloy steel.
Depending on the purpose, hot-rolled sheets are produced:
- Measured length;
- Multiple measured length;
- Measured length with a remainder of no more than 15% of the batch weight;
- A multiple of the measured length with a remainder of no more than 15% of the batch weight;
- Unmeasured length.
Weight of hot-rolled general purpose sheet GOST 103-76
| Width x thickness, b x a, mm | Weight 1m, kg | Meters per ton |
| 20x4 | 0,63 | 1592,4 |
| 20x7 | 1,10 | 909,9 |
| 20x8 | 1,26 | 796,2 |
| 20x9 | 1,41 | 707,7 |
| 20x10 | 1,57 | 636,9 |
| 22x4 | 0,69 | 1447,6 |
| 22x5 | 0,86 | 1158,1 |
| 22x6 | 1,04 | 965,1 |
| 22x7 | 1,21 | 827,2 |
| 22x8 | 1,38 | 723,8 |
| 22x9 | 1,55 | 643,4 |
| 22x10 | 1,73 | 579,0 |
| 25x4 | 0,79 | 1273,9 |
| 25x5 | 0,98 | 1019,1 |
| 25x6 | 1,18 | 849,3 |
| 25x7 | 1,37 | 727,9 |
| 25x8 | 1,57 | 636,9 |
| 25x9 | 1,77 | 566,2 |
| 25x10 | 1,96 | 509,6 |
| 28x4 | 0,88 | 1137,4 |
| 28x5 | 1,10 | 909,9 |
| 28x6 | 1,32 | 758,3 |
| 28x7 | 1,54 | 649,9 |
| 28x8 | 1,76 | 568,7 |
| 28x9 | 1,98 | 505,5 |
| 28x10 | 2,20 | 455,0 |
| 30x4 | 0,94 | 1061,6 |
| 30x5 | 1,18 | 849,3 |
| 30x6 | 1,41 | 707,7 |
| 30x7 | 1,65 | 606,6 |
| 30x8 | 1,88 | 530,8 |
| 30x9 | 2,12 | 471,8 |
| 30x10 | 2,36 | 424,6 |
| 32x4 | 1,00 | 995,2 |
| 32x5 | 1,26 | 796,2 |
| 32x6 | 1,51 | 663,5 |
| 32x7 | 1,76 | 568,7 |
| 32x8 | 2,01 | 497,6 |
| 32x9 | 2,26 | 442,3 |
| 32x10 | 2,51 | 398,1 |
| 36x4 | 1,13 | 884,6 |
| 36x5 | 1,41 | 707,7 |
| 36x6 | 1,70 | 589,8 |
| 36x7 | 1,98 | 505,5 |
| 36x8 | 2,26 | 442,3 |
| 36x9 | 2,54 | 393,2 |
| 36x10 | 2,83 | 353,9 |
| 40x4 | 1,26 | 796,2 |
| 40x5 | 1,57 | 636,9 |
| 40x6 | 1,88 | 530,8 |
| 40x7 | 2,20 | 455,0 |
| 40x8 | 2,51 | 398,1 |
| 40x9 | 2,83 | 353,9 |
| 40x10 | 3,14 | 318,5 |
| 45x4 | 1,41 | 707,7 |
| 45x5 | 1,77 | 566,2 |
| 45x6 | 2,12 | 471,8 |
| 45x7 | 2,47 | 404,4 |
| 45x8 | 2,83 | 353,9 |
| 45x9 | 3,18 | 314,5 |
| 45x10 | 3,53 | 283,1 |
| 50x4 | 1,57 | 636,9 |
| 50x5 | 1,96 | 509,6 |
| 50x6 | 2,36 | 424,6 |
| 50x7 | 2,75 | 364,0 |
| 50x8 | 3,14 | 318,5 |
| 50x9 | 3,53 | 283,1 |
| 50x10 | 3,93 | 254,8 |
| Weight 1m, kg | Meters per ton | |
| 55x4 | 1,73 | 579,0 |
| 55x5 | 2,16 | 463,2 |
| 55x6 | 2,59 | 386,0 |
| 55x7 | 3,02 | 330,9 |
| 55x8 | 3,45 | 289,5 |
| 55x9 | 3,89 | 257,4 |
| 55x10 | 4,32 | 231,6 |
| 60x4 | 1,88 | 530,8 |
| 60x5 | 2,36 | 424,6 |
| 60x6 | 2,83 | 353,9 |
| 60x7 | 3,30 | 303,3 |
| 60x8 | 3,77 | 265,4 |
| 60x9 | 4,24 | 235,9 |
| 60x10 | 4,71 | 212,3 |
| 65x4 | 2,04 | 490,0 |
| 65x5 | 2,55 | 392,0 |
| 65x6 | 3,06 | 326,6 |
| 65x7 | 3,57 | 280,0 |
| 65x8 | 4,08 | 245,0 |
| 65x9 | 4,59 | 217,8 |
| 65x10 | 5,10 | 196,0 |
| 70x4 | 2,20 | 455,0 |
| 70x5 | 2,75 | 364,0 |
| 70x6 | 3,30 | 303,3 |
| 70x7 | 3,85 | 260,0 |
| 70x8 | 4,40 | 227,5 |
| 70x9 | 4,95 | 202,2 |
| 70x10 | 5,50 | 182,0 |
| 75x4 | 2,36 | 424,6 |
| 75x5 | 2,94 | 339,7 |
| 75x6 | 3,53 | 283,1 |
| 75x7 | 4,12 | 242,6 |
| 75x8 | 4,71 | 212,3 |
| 75x9 | 5,30 | 188,7 |
| 75x10 | 5,89 | 169,9 |
| 80x4 | 2,51 | 398,1 |
| 80x5 | 3,14 | 318,5 |
| 80x6 | 3,77 | 265,4 |
| 80x7 | 4,40 | 227,5 |
| 80x8 | 5,02 | 199,0 |
| 80x9 | 5,65 | 176,9 |
| 80x10 | 6,28 | 159,2 |
| 85x4 | 2,67 | 374,7 |
| 85x5 | 3,34 | 299,7 |
| 85x6 | 4,00 | 249,8 |
| 85x7 | 4,67 | 214,1 |
| 85x8 | 5,34 | 187,3 |
| 85x9 | 6,01 | 166,5 |
| 85x10 | 6,67 | 149,9 |
| 90x4 | 2,83 | 353,9 |
| 90x5 | 3,53 | 283,1 |
| 90x6 | 4,24 | 235,9 |
| 90x7 | 4,95 | 202,2 |
| 90x8 | 5,65 | 176,9 |
| 90x9 | 6,36 | 157,3 |
| 90x10 | 7,07 | 141,5 |
| 95x4 | 2,98 | 335,2 |
| 95x5 | 3,73 | 268,2 |
| 95x6 | 4,47 | 223,5 |
| 95x7 | 5,22 | 191,6 |
| 95x8 | 5,97 | 167,6 |
| 95x9 | 6,71 | 149,0 |
| 95x10 | 7,46 | 134,1 |
| 100x4 | 3,14 | 318,5 |
| 100x5 | 3,93 | 254,8 |
| 100x6 | 4,71 | 212,3 |
| 100x7 | 5,50 | 182,0 |
| 100x8 | 6,28 | 159,2 |
| 100x9 | 7,07 | 141,5 |
| 100x10 | 7,85 | 127,4 |
When calculating the mass of 1 m, the density of steel was taken to be 7.85 tons/m3. Hot-rolled thick sheet of carbon steel of ordinary quality. GOST 14637 hot-rolled sheets are produced in the form of sheets and rolls from steel grades St0, St2kp, St2ps, St2sp, St3kp, St3ps, St3sp, St3Gps, St3Gsp, St4ps, St4sp, St5ps, St5sp, St5Gps in accordance with GOST 380. Depending on the standardized characteristics of the sheet hot-rolled are divided into categories: 1, 2, 3, 4, 5, 6. To designate a category, a category number is added to the brand designation, for example: St3ps1, St4sp3. Hot-rolled sheets are produced in thickness: 4-160 mm - sheets; 4-12 mm - rolls.
| Category | steel grade |
| 1 | St0, St2kp, St2ps, St2sp, St3kp, St3ps, St3sp, St5ps, St5sp, St5Gps |
| 2 | St2kp, St2ps, St2sp, St3kp, St3ps, St3sp, St3ps, St3sp, St5Gps |
| 3 | St3kp, St3ps, St3sp, St3Gps, St3Gsp, St4ps, St4sp |
| 4 | St3ps, St3sp, St3Gps, St3Gsp |
| 5 | St3ps, St3sp, St3Gps, St3Gsp |
| 6 | St3ps, St3sp, St3Gps, St3Gsp |
Hot-rolled sheets of categories 1 - 5 are produced in a hot-rolled state, category 6 - in a hardened state. To ensure the required properties of rolled products of all categories, heat treatment can be used. It is allowed to produce rolled products of categories 1 - 5 in a state strengthened by rolling heating or after controlled rolling. Hot-rolled thin-sheet carbon steel of high-quality and ordinary quality for general purpose. GOST 16523 Thin-sheet hot-rolled and cold-rolled carbon steel of high-quality and ordinary quality for general purpose, manufactured with a width of 500 mm or more, thickness up to 3.9 mm inclusive. Hot rolled sheets are divided into:
- by production method: hot-rolled, cold-rolled;
- by type of product: sheets, rolls;
- according to the minimum value of tensile strength (B) for strength groups: K260V, K270V, OK300V, K310V, K330V, K350V, OK360V, OK370V (for the production of welded cylinders for liquefied hydrocarbon gases at pressures up to 1.6 MPa), K390V, OK400V, K490V ;
- according to standardized characteristics into categories: 1, 2, 3, 4, 5, 6;
- by quality of surface finishing into groups:
- cold-rolled: especially high finishing - I (at the consumer’s request),
- high finish - II,
- advanced finishing - III (IlIa, III6);
- hot rolled:
- advanced finishing - III,
- regular finishing - IV;
- according to drawing ability (hot-rolled, cold-rolled sheet up to 2 mm thick, strength groups: K260V, K270V, K310V, K330V, K350V):
- deep - G,
- normal - N.
In terms of assortment, hot-rolled sheets must comply with the requirements of GOST 19903 (hot-rolled), GOST 19904 (cold-rolled). Steel grades used and chemical composition requirements
| Strength group | Steel grades | Mass fraction of elements and maximum deviations, % |
| K260V K270V K310V K330V K350V K390V K490V | 08kp 08ps, 08, 10kp, 10ps, 10 15kp, 15ps 15, 20kp 20ps, 20 25,30 35, 40, 45, 50 | According to GOST 1050 For rolled steel grades 08kp and 08ps, the lower limit of the mass fraction of carbon and silicon is not limited |
| OK300V OK360V OK370V OK400V | St1, St2 (all degrees of deoxidation) St3 (all degrees of deoxidation) St3ps, St3sp St4 (all degrees of deoxidation) St5ps, St5sp | According to GOST 380, the mass fraction of chromium, nickel and copper is standardized at the request of the consumer. The lower limit of the mass fraction of carbon is not limited. For rolled steel with grade numbers 3, 4, 5 (all degrees of deoxidation), a reduction in the mass fraction of manganese by 0.10% is allowed. When deoxidizing semi-quiet steel with aluminum, titanium or other deoxidizing agents that do not contain silicon, as well as several deoxidizing agents (ferrosilicon and aluminum, ferrosilicon and titanium, etc.), the mass fraction of silicon in the steel is allowed less than 0.05%. In this case, the mass fraction of aluminum is allowed up to 0.07%. Deoxidation with titanium, aluminum and other deoxidizing agents that do not contain silicon is indicated in the quality document |
GOST 19903-74 Hot-rolled sheet products. Assortment
Table 4
mm
| Rolled thickness | Maximum deviation in thickness of rolled products at width | |||||||||||||
| St. 1000 to 1200 | St. 1200 to 1500 | St. 1500 to 1700 | St. 1700 to 1800 | St. 1800 to 2000 | St. 2000 to 2300 | St. 2300 to 2500: | St. 2500 to 2600 | St. 2600 to 2800 | St. 2800 to 3000 | St. 3000 to 3200 | St. 3200 to 3400 | St. 3400 to 3600 | St. 3600 to 3800; | |
| St. 12.5 to 25.0 | +0,2 | +0,2 | +0,3 | +0,4 | +0,6 | +0,8 | +0,8 | +1,0 | +1,1 | +1,2 | +1,3 | +1,4 | — | — |
| -0,8 | -0,8 | -0,8 | -0,8 | -0,8 | -0,8 | -0,8 | -0,8 | -0,8 | -0,8 | -0,8 | -0,8 | |||
| » 25,0 » 30,0 | +0,2 | +0,2 | +0,3 | +0,4 | +0,6 | +0,8 | +0,9 | +1,0 | +1,1 | +1,2 | +1,3 | +1,4 | +1,5 | +1,6 |
| -0,9 | -0,9 | -0,9 | -0,9 | -0,9 | -0,9 | -0,9 | -0,9 | -0,9 | -0,9 | -0,9 | -0,9 | -0,9 | -0,9 | |
| » 30,0 » 34,0 | +0,2 | +0,3 | +0,3 | +0,4 | +0,5 | +0,8 | +0,9 | +1,0 | +1,2 | +1,3 | +1,4 | +1,5 | +1,6 | +1,7 |
| -1,0 | -1,0 | -1,0 | -1,0 | -1,0 | -1,0 | -1,0 | -1,0 | -1,0 | -1,0 | -1,0 | -1,0 | -1,0 | -1,0 | |
| » 34,0 » 40,0 | +0,3 | +0,4 | +0,5 | +0,6 | +0,7 | +0,9 | +1,0 | ±1,1 | +1,3 | +1,4 | +1,5 | +1,6 | +1,7 | +1,8 |
| -1,1 | -1,1 | -1,1 | -1,1 | -1,1 | -1,1 | -1,1 | -1,1 | -1,1 | -1,1 | -1,1 | -1,1 | -1,1 | ||
| » 40,0 » 50,0 | +0,4 | +0,5 | +0,6 | +0,7 | +0,8 | +1,0 | +1,1 | ±1,2 | +1,4 | +1,5 | +1,6 | +1,7 | +1,8 | +1,9 |
| -1,2 | -1,2 | -1,2 | -1,2 | -1,2 | -1,2 | -1,2 | -1,2 | 19, | -1,2 | -1,2 | -1,2 | -1,2 | ||
| » 50,0 » 60,0 | +0,6 | +0,6 | +0,7 | +0,8 | +0,9 | +1,0 | +1,1 | +1,2 | +1,4 | +1,5 | +1,6 | +1,7 | +1,8 | +1,9 |
| -1,3 | -1,3 | -1,3 | -1,3 | -1,3 | -1,3 | -1,3 | -1,3 | -1,3 | -1,3 | -1,3 | -1,3 | -1,3 | -1,3 | |
| » 60,0 » 70,0 | -. | +0,7 | +0,8 | +0,9 | +1,0 | +1,1 | +1,2 | +1,3 | +1,4 | +1,5 | ±1,6 | +1,7 | +1,8 | +1,9 |
| -1,6 | -1,6 | -1,6 | -1,6 | -1,6 | -1,6 | -1,6 | -1,6 | -1,6 | -1,6 | -1,6 | -1,6 | |||
| » 70,0 » 80,0 | — | +0,7 | +0,8 | +0,9 | +1,0 | +1,1 | +1,2 | +1,3 | +1,4 | +1,5 | +1,6 | +1,7 | +1,8 | +1,9 |
| -2,2 | -2,2 | -2,2 | -2,2 | -2,2 | -2,2 | -2,2 | -2,2 | -2,2 | -2,2 | -2,2 | -2,2 | -2,2 | ||
| » 80,0 » 90,0 | — | +0,8 | +0,9 | +1,0 | +1,1 | +1,2 | +1,3 | +1,4 | +1,5 | +1,6 | +1,7 | +1,8 | +1,9 | +2,0 |
| -2,5 | -2,5 | -2,5 | 2,5 | -2,5 | -2,5 | -2,5 | -2,5 | -2,5 | -2,5 | -2,5 | -2,5 | -2,5 | ||
| » 90,0 » 100,0 | — | +0,9 | +1,0 | +1,1 | +1,2 | +1,3 | +1,4 | +1,5 | +1,6 | +1,7 | +1,8 | +1,9 | +2,0 | +2,1 |
| -2,7 | -2,7 | -2,7 | -2,7 | -2,7 | -2,7 | -2,7 | -2,7 | -2,7 | -2,7 | -2,7 | -2,7 | -2,7 | ||
| » 100,0 » 115,0 | — | +1,1 | +1,2 | +1,3 | +1,4 | +1,5 | +1,6 | +1,7 | +1,8 | +1,9 | +2,0 | +2,1 | +2,2 | +2,3 |
| -3,1 | -3,1 | -3,1 | -3,1 | -3,1 | -3,1 | -3,1 | -3,1 | -3,1 | -3,1 | -3,1 | -3,1 | -3,1 | ||
| » 115,0 » 125,0 | — | +1,4 | +1,5 | +1,6 | +1,7 | +1,8 | +1,9 | +2,0 | +2,1 | +2,2 | +2,3 | +2,4 | +2,5 | +2,6 |
| -3,5 | -3,5 | -3,5 | -3,5 | -3,5 | -3,5 | -3,5 | -3,5 | -3,5 | -3,5 | -3,5 | -3,5 | -3,5 | ||
| » 125,0 » 140,0 | — | +1,6 | +1,7 | +1,8 | +1,9 | +2,0 | +2,1 | +2,2 | +2,3 | +2,4 | +2,5 | +2,6 | +2,8 | +2,9 |
| -3,8 | -3,8 | -3,8 | -3,8 | -3,8 | -3,8 | -3,8 | -3,8 | -3,8 | -3,8 | -3,8 | -3,8 | -3,8 | ||
| » 140,0 » 160,0 | — | +1,9 | +2,0 | +2,1 | +2,2 | +2,3 | +2,4 | +2,5 | +2,6 | +2,7 | +2,8 | +2,9 | +3,0 | +3,1 |
| -4,2 | -4,2 | -4,2 | -4,2 | -4,2 | -4,2 | -4,2 | -4,2 | -4,2 | -4,2 | -4,2 | -4,2 | -4,2 | ||
| Note. At the request of enterprises of the Ministry of Aviation Industry, it is allowed to produce rolled sheets with minus tolerances equal in value to the sum of the maximum deviations. | ||||||||||||||
5. At the request of the consumer, the thickness difference in rolled products produced in rolls in one cross section should not exceed half the sum of the maximum deviations in thickness.
6. Maximum deviations in the width of rolled products with cut edges, produced in rolls, must not exceed:
+5 mm - for widths from 500 to 1000 mm inclusive;
+10 mm - with a width of St. 1000 mm.
7. Maximum deviations in the width of rolled products with cut edges, manufactured in sheets, should not exceed the standards specified in table. 5.
Table 5
mm
| Rolled width | Rolled thickness | Maximum deviation in width of rolled products |
| Up to 800 St. 800 | Up to 3.9 | +6 +10 |
| Up to 1500 St. 1500 | St. 3.9 to 16 | +10 +15 |
| All widths | St. 16 to 60 | +25 |
| St. 60 to 100 | +50 | |
| St. 100 to 160 | +75 | |
| Note. For sheets longer than 8 m with a thickness of up to 12 mm, maximum deviations in width should not exceed 0.2% of the length. | ||
By agreement between the manufacturer and the consumer, the maximum deviations in the width of rolled products with trimmed edges, produced in sheets, should not exceed:
+5 mm - for widths up to 1000 mm inclusive;
+10 mm - with a steel width of St. 1000 mm.
(Changed edition, Amendment No. 1, 2, 3).
8. Maximum deviations in the width of sheet metal, rolled sheet-by-sheet and manufactured with an unedged edge, should not exceed by more than 50 mm the maximum deviations in width indicated in Table. 5.
By agreement between the consumer and the manufacturer, other maximum deviations are allowed to ensure that the consumer receives sheets with the dimensions specified in the order.
(Changed edition, Amendment No. 1).
9. Maximum deviations in the width of rolled products rolled on continuous mills and manufactured with uncut edges must not exceed:
+20 mm - for widths up to 1000 mm;
+30 mm - for widths over 1000 mm.
10. Maximum deviations along the length of sheet-rolled products must not exceed the standards specified in table. 6.
Table 6
mm
| Rolled length | Rolled thickness | Maximum deviation along the length of rolled products |
| Up to 1500 | Up to 3.9 | +10 |
| St. 1500 | +15 | |
| Until 2000 | St. 3.9 to 16 | +10 |
| St. 2000 to 6000 | +25 | |
| » 6000 | +35 | |
| Up to 3000 | St. 16 to 60 | +15 |
| St. 3000 to 6000 | +25 | |
| » 6000 | +40 | |
| All lengths | St. 60 to 100 | +50 |
| » 100 » 160 | +75 |
(Changed edition, Amendment No. 1).
11. Maximum deviations along the length of rolled products rolled on continuous mills and cut into sheets must not exceed the standards specified in table. 7.
Table 7
mm
| Rolled length | Rolled thickness | Maximum deviation along the length of rolled products |
| Up to 1500 | Up to 3.9 | +15 |
| St. 1500 | +20 | |
| Up to 4000 | St. 3.9 | +20 |
| St. 4000 | +25 |
(Changed edition, Amendment No. 3).
12. Deviations from flatness per 1 m length of rolled products produced in sheets should not exceed the standards specified in table. 8.
13. The crescent shape of rolled products manufactured in rolls should not exceed 10 mm per 3 m length. By agreement between the manufacturer and the consumer, the crescent shape of rolled products produced in sheets should not exceed 2 mm per 1 m length.
By agreement between the consumer and the manufacturer, another maximum crescent value may be established.
(Changed edition, Amendment No. 6).
14. Sheets should be cut at right angles. The oblique cut and crescent shape should not take the sheets beyond the nominal dimensions in width and length.
(Changed edition, Amendment No. 1).
Table 8
mm
| Type of flatness | Deviation from flatness with thickness of rolled products, mm, no more | ||
| 0,4 — 1,4 | 1,5 — 3,9 | 4.0 or more | |
| Particularly high | 8 | 8 | 5 |
| High | 10 | 10 | 8 |
| Improved | 15 | 12 | 10 |
| Normal | 20 | 15 | 12 |
| Notes: 1. Deviations from flatness, given in table. 8, apply to rolled sheets with sв < 70 kgf/mm2, for rolled sheets with sв > 70 kgf/mm2 standards are established in standards for general technical requirements or in technical specifications. 2. Rolled sheets with particularly high flatness are produced by agreement between the consumer and the manufacturer. | |||
(Changed edition, Amendment No. 1).
15. When producing rolled products in sheets and rolls with uncut edges, tears and other defects (if they are present on the edges) should not exceed half of the maximum deviations in width and bring the sheets beyond the nominal size along the width specified in the order.
16. Products produced in rolls must not have twisted or crumpled ends. Curved edges at an angle of no more than 90° are allowed in some places.
17. The telescopicity of rolled products produced in rolls should not exceed the standards specified in table. 9.
Table 9
mm
| Rolled thickness | Rolled width | Telescopicity of rolls |
| Up to 2.5 | Up to 800 | 50 |
| St. 800 | 100 | |
| St. 2.5 | Up to 800 | 35 |
| St. 800 | 70 | |
| Note. By agreement between the manufacturer and the consumer, the telescopicity of rolled products in rolls up to 2.5 mm thick, width St. 800 mm should not exceed 70 mm. | ||
The excess of one internal or one external turn above the surface of the roll end is not telescopic.
A loose fit between the two outer turns of the roll is allowed.
(Changed edition, Amendment No. 2, 3).
18. Measurement of the thickness of rolled products is carried out:
a) on sheets - at a distance of at least 100 mm from the ends and at least 40 mm from the edges;
b) on rolls - at a distance of at least 40 mm from the edges and at least 2 m from the end of the roll.
(Changed edition, Amendment No. 1).
19. The width of rolled products produced in rolls is measured at a distance of at least 2 m from the end of the roll.
Partial width ends should not exceed the width of the roll. At the request of the consumer, ends of partial width must be trimmed.
20. Methods for measuring shape deviations - according to GOST 26877.
(Changed edition, Amendment No. 1, 6).
21. Rolled products may consist of no more than two pieces (separate or connected by a weld).
The ratio of the lengths of the pieces in one roll should not be less than 1:5. By agreement between the consumer and the manufacturer, rolls with a large number of pieces or welds are allowed.
22. The internal diameter of the roll must be no less than 650 mm and no more than 1000 mm.
23. The maximum weight of each roll should not exceed 20 tons. By agreement between the consumer and the manufacturer, rolls of other weights are allowed.
21 — 23. (Changed edition, Amendment No. 1).
