力學性能：
標準牌號抗拉強度（MPa）屈服強度（MPa）伸長率（％）沖擊功（J）硬度GB308710335～475≥195≥24 /20410～550≥245≥20 /GB531020G410～550≥245≥24≥35/GB/T816210335185～20524 20390225～24520 35510285～30517 45590315～33514 Q345490305～32521 GB/T816310335～475195～20524 20410～550235～24520 Q295430～610285～29522 Q345490～665315～32521 ASME SA106SA106B≥415≥240≥22≥35/SA106C≥485≥275≥20≥35/ASTM A106A106 Gr.A≥330≥20535 縱向 25 橫向A106 Gr.B≥415≥24030 縱向 16.5 橫向A106 Gr.C≥485≥27530 縱向 16.5 橫向
化學成分:
標準牌號化學成分（％）CSiMnPSCrMoCuNiVGB3087100.07～0.130.17～0.370.38～0.65≤0.030≤0.0300.3～0.65/≤0.25≤0.30/200.17～0.230.17～0.370.38～0.65≤0.030≤0.0300.3～0.65/≤0.25≤0.30/GB531020G0.17～0.240.17～0.370.35～0.65≤0.030≤0.030≤0.25≤0.15≤0.20≤0.25≤0.08ASME SA106SA106B0.17～0.25≥0.10.70～1.00≤0.030≤0.030≤0.035ASTM A106A106 Gr.A≤0.25≤0.100.27～0.93≤0.035≤0.035≤0.40≤0.15≤0.40≤0.40≤0.08A106 Gr.B≤0.30≤0.100.29～1.06≤0.035≤0.035≤0.40≤0.15≤0.40≤0.40≤0.08A106 Gr.C≤0.35≤0.100.29～1.06≤0.035≤0.035≤0.40≤0.15≤0.40≤0.40≤0.08
