GOST-19281-1989-ENG.pdf
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1、U S S R S T A T E S T A N D A R D ROLLED STEEL WITH ENHANCED STRENGTH GENERAL SPECIFICATIONS GOST 19281 89 Official Edition USSR STATE COMMITTEE FOR PRODUCT QUALITY MANAGEMENT AND STANDARDS Moscow UDC 669.14-413: 006.354Group B20 U S S R S T A T E S T A N D A R D ROLLED STEEL WITH ENHANCED STRENGTH
2、General specifications OKP (All-Union Product Classification Code) 09 2500, 09 3000, 09 7000, 11 2000 GOST 19281 89 Term from 01.01.91 until 01.01.96 This Standard applies to thick-sheet, general-purpose wide-strip, shaped, graded steel and roll-formed sections made of steel with enhanced strength f
3、or welded, riveted or bolted constructions mainly used in products without additional heat treatment. Regarding the chemical composition norms, this Standard also applies to thin sheets, ingots, slabs, blooms, forged pieces and stampings. 1. RANGE OF PRODUCTS 1.1. Rolled steel shall have the classes
4、 of strength 265, 295, 315, 325, 345, 355, 375, 390 and 440. 1.2. Shape, dimensions and maximum deviations of the rolled steel shall meet the requirements of GOST 8509 (for equal angles), GOST 8510 (for unequal angles), GOST 8239 (for I-beams), GOST 19425 (for I-beams and structural channels), GOST
5、26020 (for I-beams with parallel flanges), GOST 8240 (for structural channels), GOST 19903 (for rolled sheets), GOST 103 (for the strip) and GOST 82 (for general-purpose wide strips), GOST 7511, GOST 8278, GOST 8281, GOST 8282, GOST 8283, GOST 9234, GOST 10551, GOST 13229, GOST 14635, GOST 19771, GO
6、ST 19772 and GOST 25577 (for the roll-formed section), GOST 2590 (for the round bars), GOST 2591 (for the square bars) and GOST 21026 (for structural channel with a bent flange). Official Edition # # Standards Publishing House, 1989 Standards Publishing House, 1991 Revised edition with Amendments Th
7、is Standard may not be reproduced, in full or in part, reprinted or distributed without the permission of Gosstandart of the USSR p. 2 GOST 19281 89 (Amended Wording, Amendment No. 1) 1.3. The rolled steel accuracy degrees regarding dimensions, flatness and curvature shall be specified in the custom
8、ers order within the limits of this Standards product range. If the requirements are absent in the order, the accuracy degree shall be determined by the manufacturer. 1.4. Examples of conventional designations are given in Appendix 1. 2. TECHNICAL REQUIREMENTS 2.1. Characterist ics o f t he basic mo
9、d ificat io n 2.1.1. The basic chemical composition for each class of strength are given in Appendix 2. Fraction of total mass of phosphorus in steel shall be no more than 0.035 %; that of sulfur shall be no more than 0.040 %. Fraction of total mass of nitrogen in steel shall be no more than 0.012 %
10、; that of arsenic shall be no more than 0.08 %. When steel is melted from Kerch ores, the fraction of total mass of arsenic shall be no more than 0.15 %, and the fraction of total mass of phosphorus shall be no more than 0.030 %. The list of steel grades recommended for different classes of strength
11、 and thickness of shaped section and rolled section is given in Appendix 3; that of rolled sheet is given in Appendix 4. 2.1.2. Finished rolled stock shall be hot-rolled and heat-treated or shall be after controlled rolling according to the order. If the instructions are absent in the order, then th
12、e manufacturing technique shall be determined by the manufacturer. 2.1.3. The surface, the edge and the end rolled steel requirements shall correspond to GOST 14637 (for rolled sheet) and GOST 535 (for rolled section and shaped section). (Amended Wording, Amendment No. 1) 2.1.4. Sheet delamination s
13、hall not be allowed. 2.1.5. The tension mechanical characteristics and bending test conditions shall meet the requirements of table 1 (for shaped section and rolled section) and table 2 (for rolled sheets, general-purpose wide strips and roll-formed sections). The bending test of the shaped section
14、and rolled sheets with maximum thickness of 20 mm may not be carried out at the manufacturing plant. Moreover, the norms established by the manufacturer shall be observed. p. 3 GOST 19281 89 Table 1 Rolled section and shaped section mechanical characteristics Yield point , H/mm2 (kgf/mm2) Ultimate s
15、trength , H/mm2 (kgf/mm2) Relative elongation 5, in %Class of strength Maximum thickness of rolled steel in accordance with the given class of strength, in mm Not less than Curvature before parallelism of the sides (a is the sample thickness, d is the swage diameter) 265100265 (27)430 (44) 295100295
16、 (30)430 (44) 32560325 (33)450 (46) 34520345 (35)480 (49) 37510375 (38)510 (52) 21 39020390 (40)530 (54)18 d=2a Not e. When steel of grades 092 and 092 with maximum thickness of 20 mm and class of strength 295 is ordered, the yield point shall be minimum 305 H/mm2, and ultimate strength shall be min
17、imum 440 H/mm2. Table 2 Mechanical characteristics of rolled sheet, strip, general-purpose wide strip and roll-formed section Yield point , H/mm2 (kgf/mm2) Ultimate strength , H/mm2 (kgf/mm2) Relative elongation 5, in % Class of strength Maximum thickness of rolled steel in accordance with the given
18、 class of strength, in mm Not less than Curvature before parallelism of the sides (a is the sample thickness, d is the swage diameter) 265160265 (27)430 (44) 295100295 (30)430 (44) 31560315 (32)450 (46) 32560325 (33)450 (46) 34532345 (35)490 (50) 35520355 (36)490 (50) 21 37550375 (38)510 (52)20 3905
19、0390 (40)510 (52) 44032440 (45)590 (60) 10 d=2a Not e. When steel of grade 16C and class of strength 265 is ordered, the ultimate strength shall be a minimum of 450 H/mm2. When steel of grades 092 and 092 with maximum thickness of 20 mm and class of strength 295 is ordered, the yield point shall be
20、minimum 305 H/mm2, and ultimate strength shall be a minimum of 440 H/mm2. When steel of grade 12C and class of strength 315 is ordered, the relative elongation shall be a minimum of 26 %. When steel of grade 092C with thickness between 10 and 20 mm is ordered, the ultimate strength shall be a minimu
21、m of 470 H/mm2. When steel of grades 17C and 171C and class of strength 345 is ordered, the relative elongation shall be a minimum of 23 %. When steel of grade 10XH and class of strength 345 is ordered the ultimate strength shall be a minimum of 470 H/mm2 and the relative elongation shall be a minim
22、um of 20 %. (Amended Wording, Amendment No. 1) -,-,- Table 3 Chemical composition of low-alloyed grades of steel Fraction of total mass of elements, in % Steel grade Degree of deoxidation CarbonSiliconManganeseChromeNickelCopperVanadium Other elements 092No more than 0.12 0.17 to 0.371.4 to 1.8No mo
23、re than 0.30 No more than 0.30 No more than 0.30 092No more than 0.12 0.17 to 0.371.4 to 1.8No more than 0.30 No more than 0.30 0.15 to 0.30 12C0.09 to 0.150.5 to 0.80.8 to 1.2No more than 0.30 No more than 0.30 No more than 0.30 16C0.12 to 0.180.4 to 0.70.9 to 1.2No more than 0.30 No more than 0.30
24、 No more than 0.30 1420.12 to 0.180.17 to 0.371.2 to 1.6No more than 0.30 No more than 0.30 No more than 0.30 17C0.14 to 0.200.4 to 0.61.0 to 1.4No more than 0.30 No more than 0.30 No more than 0.30 092CNo more than 0.12 0.5 to 0.81.3 to 1.7No more than 0.30 No more than 0.30 No more than 0.30 092C
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