常用钢的化学成分

牌号碳硅锰磷(≤)S硫(≤)镍(≤)铬(≤)钼钛20#0.17-0.240.17-0.370.35-0.65

45#0.42-0.500.17-0.370.50-0.80≤0.035≤0.035≤0.25≤0.25

Q345B(16Mn)≤0.20≤0.55 1.00-1.60≤0.040≤0.040

30CrMo0.26-0.340.17-0.370.40-0.70≤0.035≤0.035≤0.0300.80～1.100.15～0.25

35CrMo0.30-0.380.17-0.370.40-0.700.80-1.100.15-0.25

42 CrMo0.38-0.450.17-0.370.50-0.800.90-1.200.15-0.25

60Si2Mn（弹簧）0.56-0.64 1.50-2.000.60-0.90

60Si2CrA（弹簧）0.56-0.64 1.40-1.800.40-0.700.70-1.00

0Cr23Mo13(309S)≤0.08≤1.00≤2.0012.00-15.0022.00-24.00

0Cr25Mo20(310S)≤0.08≤1.00≤2.00≤0.035≤0.03019.00-22.0024.00-26.00

20CrMnTi(键条)0.17-0.230.17-0.370.80-1.10 1.00-1.300.04-0.10 40 Cr0.37-0.440.17-0.370.50-0.800.80-1.10

27SiMn0.24-0.32 1.10-1.40 1.10-1.40

20MnV0.17-0.24 1.30-1.60

20CrMnM00.17-0.230.17-0.370.90-1.20 1.10-1.40