LY2冷墩钢
面议
牌号
化学成分 a( 质量分数) %
C Si Mn P S Alt
SAPH310 ≤0.10 ≤0.30 ≤0.80
≤0.025 ≤0.020
≥0.010
SAPH370 ≤0.21 ≤0.30 ≤1.00
SAPH400
≤0.21 ≤0.30
≤1.40
≤0.025 ≤0.020
SAPH440 ≤1.60
SPFH540 ≤0.15 ≤0.50 ≤1.80
SPFH590 ≤0.18 ≤0.60 ≤2.00 ≤0.025 ≤0.020
SPFH780 ≤0.20 ≤1.00 ≤2.10
B440QZR ≤0.12 ≤0.50 ≤1.30
≤0.025
≤0.020
-
B480QZR ≤0.16 ≤0.50 ≤1.50 ≤0.020
a 为改善钢的性能, 根据需要可添加其他合金元素, 此时 Alt 的下限不要求。Q/BQB 310—2023