16Mn(Q345B)低合金无缝钢管的力学性能和化学成分钢种力学性能化学成份屈服强度抗拉强度伸长率CSiMnSPMPakg/mm²MPakg/mm²min不大于不大于不大于Q215AQ215B21522335-41034-42310.09-0.150.030.25-0.550.0500.0450.045Q235AQ235BQ235CQ235D23524375-46038-47260.14-0.220.12-0.20≤0.18≤0.170.300.30-0.650.30-0.700.35-0.800.35-0.800.500.450.400.0350.0450.0450.0400.03516Mn(Q345B)34535510-60051.60220.12-0.200.20-0.551.2-1.60.0450.045
