S550NC化学成分（熔炼分析）%
C:≤0.12
Si：≤0.6
Mn:≤1.80
P:≤0.025
S:≤0.025
Ait:≥0.015
Nb:≤0.09
Tia：≤0.15
S550NC机械性能
S550NC屈服
S550NC抗拉 ：&ge
S550NC延伸 ：≥12
德国专业用钢和精品用钢
S315MC S340MC S355MC S380MC S420MC S460MC S500MC S600MC S700MC S650MC S260NC S315NC S340NC S355NC S380NC S420NC S460NC S500NC S550NC......
