化学成分
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标准:
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牌号: 29-4-2
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具体成分:s: ≤0.020
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C: ≤0.010CR: 28.0~30.0
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Sl: ≤0.20Ni: 2.0~2.50
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MN: ≤0.30MO: 3.5~4.2
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P: ≤0.025N:
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其他: Cu≤0.15N+C≤0.025