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詳細內(nèi)容:牌號 化學(xué)成分a,% C Si Mn P S Alt SAPH310 ≤0.10 ≤0.30 ≤0.50 ≤0.035 ≤0.035 ≥0.010 SAPH370 ≤0.21 ≤0.30 ≤0.75 SAPH400 ≤0.21 ≤0.30 ≤1.40 ≤0.030 ≤0.025 SAPH440 ≤1.50 SPFH540 ≤0.15 ≤0.50 ≤1.80 ≤0.025 ≤0.025 SPFH590 ≤0.18 ≤0.60 ≤2.00 B440QK ≤0.21 ≤0.35 ≤1.80 ≤0.030 ≤0.025 B330CL ≤0.10 ≤0.30 ≤0.50 ≤0.030 ≤0.025 B380CL ≤0.12 ≤0.30 ≤1.20 B420CL ≤0.12 ≤0.30 ≤1.50 B320L ≤0.10 ≤0.30 ≤0.50 ≤0.030 ≤0.035 B420L ≤0.12 ≤0.50 ≤1.50 ≤0.025 B510L ≤0.16 ≤0.50 ≤1.60 ≤0.025 B510DL ≤0.18 ≤0.30 ≤1.60 ≤0.025 ≤0.020 B550L ≤0.16 ≤0.50 ≤1.60 ≤0.030 ≤0.025 B440QZR ≤0.12 ≤0.50 ≤1.30 ≤0.030 ≤0.025 - B480QZR ≤0.16 ≤0.50 ≤1.50 ≤0.035 a為改善鋼的性能,根據(jù)需要可添加其他合金元素,此時Alt的下限不要求。
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