準名稱： 冷成型熱軋汽車結構鋼 產 地 ：寶鋼 使用范圍：本牌號系列為細晶粒鋼，具有良好冷成型性。用于要求良好的冷成型性能并有較高或高強度要求的汽車大梁、橫梁等汽車結構件。 化學成分（熔煉分析）% 材質 C Si Mn P S Ti Nb Ait V S315MC ≤0.12 ≤0.50 ≤1.30 ≤0.25 ≤0.02 ≤0.15 ≤0.09 ≥0.015 ≤0.20 S355MC ≤0.12 ≤0.50 ≤1.50 ≤0.25 ≤0.02 ≤0.15 ≤0.09 ≥0.015 ≤0.20 S420MC ≤0.12 ≤0.50 ≤1.60 ≤0.25 ≤0.015 ≤0.15 ≤0.09 ≥0.015 ≤0.20 S460MC ≤0.12 ≤0.50 ≤1.60 ≤0.25 ≤0.015 ≤0.15 ≤0.09 ≥0.015 ≤0.20 S500MC ≤0.12 ≤0.50 ≤1.70 ≤0.25 ≤0.015 ≤0.15 ≤0.09 ≥0.015 ≤0.20 S550MC ≤0.12 ≤0.50 ≤1.80 ≤0.25 ≤0.015 ≤0.15 ≤0.09 ≥0.015 ≤0.20 S600MC ≤0.12 ≤0.50 ≤1.90 ≤0.25 ≤0.015 ≤0.22 ≤0.09 ≥0.015 ≤0.20 S650MC ≤0.12 ≤0.60 ≤2.00 ≤0.25 ≤0.015 ≤0.22 ≤0.09 ≥0.015 ≤0.20 S700MC ≤0.12 ≤0.60 ≤2.10 ≤0.25 ≤0.015 ≤0.22 ≤0.009≥0.015 ≤0.20