力学性能化学成份屈服强度抗拉强度伸长率CSiMnSPMPakg/mm�0�5MPakg/mm�0�5min不大于不大于不大于Q215A Q215B
21522335-41034-42310.09-0.150.030.25-0.550.050 0.045
0.045Q235A Q235B
Q235C
Q235D
23524375-46038-47260.14-0.22 0.12-0.20
≤0.18
≤0.17
0.300.30-0.65 0.30-0.70
0.35-0.80
0.35-0.80
0.50 0.45
0.40
0.035
0.045 0.045
0.040
0.035
16Mn(Q345B)34535510-60051.60220.12-0.200.20-0.551.2-1.60.0450.045X4228929.541342.1 0.28-1.250.0300.030X5235836.545546.40.30-1.350.0300.030X5638639.448949.90.26-1.350.0300.030X6041342.151752.70.26-1.350.0300.030X6544845.753054.00.26-1.400.0300.030X7048249.256557.60.26-1.400.0300.030L245245 415 210.26 1.150.0300.030L290290 415 210.28 1.250.0300.030L360360 460 190.3 1.250.0300.030
GB/3901_2008 是国家推行的标准 不是强制性标准,正确写法 GB/T3901-2008
此钢材的最大承压为235兆帕
Q代表屈服强度235是所能承受最大235Mpa