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详细内容:牌号 化学成分(熔炼分析) % (质量分数) C Mn P S Alt B180P2 ≤0.08 ≤0.08 ≤0.12 ≤0.025 ≥0.015 B220P2 ≤0.10 ≤1.00 ≤0.12 ≤0.025 ≥0.015 HC180P ≤0.05 ≤0.60 ≤0.08 ≤0.025 ≥0.015 HC220P ≤0.07 ≤0.70 ≤0.08 ≤0.025 ≥0.015 HC260P ≤0.08 ≤0.70 ≤0.10 ≤0.025 ≥0.015 HC300P ≤0.10 ≤0.70 ≤0.12 ≤0.025 ≥0.015
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