钢管标准钢管牌号A106无缝钢管化学成分CSiMnPSCrMoCuNiVASTMA106A≤0.25≥0.100.27~0.93≤0.035≤0.035≤0.40≤0.15≤0.40≤0.40≤0.08B≤0.30≥0.100.29～1.06≤0.035≤0.035≤0.40≤0.15≤0.40≤0.40≤0.08C≤0.35≥0.100.29～1.06≤0.35≤0.35≤0.40≤0.15≤0.40≤0.40≤0.08)