PDF《隆兴铸业常规材料标准》

302 N GB 15Mn 0.12-0.19 0.17-0.37 0.70-1.00 0.035 0.035 ≤0.25 ≤0.25 0.25

410 245

26 55

163 N GB 20Mn 0.17-0.24 0.17-0.37 0.70-1.00 0.035 0.035 ≤0.25 ≤0.25 0.25

450 275

24 50

197 N GB 25Mn 0.22-0.30 0.17-0.37 0.70-1.00 0.035 0.035 ≤0.25 ≤0.25 0.25

490 295

22 50

71 207 N GB 30Mn 0.27-0.35 0.17-0.37 0.70-1.00 0.035 0.035 ≤0.25 ≤0.25 0.25

540 315

20 45

63 217 N GB 35Mn 0.32-0.40 0.17-0.37 0.70-1.00 0.035 0.035 ≤0.25 ≤0.25 0.25

560 335

18 45

55 229 N GB 40Mn 0.37-0.45 0.17-0.37 0.70-1.00 0.035 0.035 ≤0.25 ≤0.25 0.25

590 355

17 45

47 229 N GB 45Mn 0.42-0.50 0.17-0.37 0.70-1.00 0.035 0.035 ≤0.25 ≤0.25 0.25

620 375

15 40

39 241 N GB 50Mn 0.48-0.56 0.17-0.37 0.70-1.00 0.035 0.035 ≤0.25 ≤0.25 0.25

645 390

13 40

31 255 N GB 60Mn 0.57-0.65 0.17-0.37 0.70-1.00 0.035 0.035 ≤0.25 ≤0.25 0.25

695 410

11 35

269 N GB 65Mn 0.62-0.70 0.17-0.37 0.70-1.00 0.035 0.035 ≤0.25 ≤0.25 0.25

735 430

9 30

285 N GB 701Mn 0.67-0.75 0.17-0.37 0.70-1.00 0.035 0.035 ≤0.25 ≤0.25 0.25

785 450

8 30

285 N 等级A:≤0.16 ≤0.55 0.80-1.50 0.045 0.045 0.02-0.15 390-570

295 23 等级B:≤0.16 ≤0.55 0.80-1.50 0.040 0.040 0.02-0.15 390-570

295 23

34 等级A: ≤0.20 ≤0.55 1.00-1.60 0.045 0.045 0.02-0.15 470-630

345 21 等级B:≤0.20 ≤0.55 1.00-1.60 0.040 0.040 0.02-0.15 470-630

345 21

34 等级C:≤0.20 ≤0.55 1.00-1.60 0.035 0.035 0.02-0.15 470-630

345 22

34 等级D:≤0.18 ≤0.55 1.00-1.60 0.030 0.030 0.02-0.15 470-630

345 22

34 等级E:≤0.18 ≤0.55 0.025 0.025 0.02-0.15 470-630

345 22

27 等级A: ≤0.20 ≤0.55 1.00-1.60 0.045 0.045 0.02-0.20 490-650

390 19 等级B:≤0.20 ≤0.55 1.00-1.60 0.040 0.040 0.02-0.20 490-650

390 19

34 等级C:≤0.20 ≤0.55 1.00-1.60 0.035 0.035 0.02-0.20 490-650

390 20

34 等级D:≤0.20 ≤0.55 1.00-1.60 0.030 0.030 0.02-0.20 490-650

390 20

34 等级E:≤0.20 ≤0.55 1.00-1.60 0.025 0.025 0.02-0.20 490-650

390 20

27 等级A: ≤0.20 ≤0.55 1.00-1.70 0.045 0.045 0.02-0.20 520-680

420 18 等级B:≤0.20 ≤0.55 1.00-1.70 0.040 0.040 0.02-0.20 520-680

420 18

34 等级C:≤0.20 ≤0.55 1.00-1.70 0.035 0.035 0.02-0.20 520-680

420 19

34 等级D:≤0.20 ≤0.55 1.00-1.70 0.030 0.030 0.02-0.20 520-680

420 19

34 等级E:≤0.20 ≤0.55 1.00-1.70 0.025 0.025 0.02-0.20 520-680

420 19

34 等级C:≤0.20 ≤0.55 1.00-1.70 0.035 0.035 0.02-0.20 550-720

460 17

34 等级D:≤0.20 ≤0.55 1.00-1.70 0.030 0.030 0.02-0.20 550-720

460 17

34 等级E:≤0.20 ≤0.55 1.00-1.70 0.025 0.025 0.02-0.20 550-720

460 17

27 GB Q295 2.1.2 低合金高强度钢、耐候钢和建筑用钢筋 (1)GB新标准低合金高强度钢 (GB/T 1591-94) GB Q345 GB Q390 GB Q420 Q460 GB C Si Mn P ≤ S ≤ Cr Ni Mo Cu≤ V B CE Tensil Strength Mpa Yield strength Mpa Elongate rate % Reduction of area % Impact test J CHEMICAL COMPOSITION % MECHANICAL PROPERTIES ≥ Hardness HB Standard Material Heat treatment GB 09MnV ≤0.12 0.20-0.55 0.80-1.20 0.045 0.045 0.04-0.12 430-580

295 23

27 GB 09MnNb ≤0.12 0.20-0.55 0.80-1.20 0.045 0.045 410-560

295 24

27 GB 09Mn2 ≤0.12 0.20-0.55 1.40-1.80 0.045 0.045 440-590

295 22

27 GB 12Mn 0.09-0.16 0.20-0.55 1.10-1.50 0.045 0.045 440-590

295 22

27 GB 18Nb 0.14-0.22 0.17-0.37 0.40-0.80 0.045 0.045 470-620

345 20

27 GB 09MnCuPTi ≤0.12 0.20-0.55 1.00-1.50 0.05-0.12 0.045 490-640

345 22

27 GB 10MnSiCu ≤0.12 0.80-1.10 1.25-1.60 0.045 0.045 490-640

345 22

27 GB 12MnV ≤0.15 0.20-0.55 1.00-1.40 0.045 0.045 0.04-0.12 490-640