冷軋汽車結構件鋼 B300LA ≤0.10? ≤0.60 ≤0.025 ≤0.030? ˉ ≥0.020? ≤0.09? 300~400 ≥400 26
B340LA ≤0.12? ≤1.00? ≤0.030? ≤0.030? ˉ ≥0.020? ≤0.09? 340~460 ≥440 24
B410LA ≤0.20? ≤2.00? ≤0.030? ≤0.030? ˉ ≥0.020? ≤0.09? 410~560 ≥590 17
B500LA ≤0.12? ≤1.70 ≤0.025 ≤0.030? ˉ ≥0.020? ≤0.09? 500~640 ≥630 15
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