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牌 號 | 化 學 成 分 % | ||||||||||
C
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Mn
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P
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S
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Alt
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Ti
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BLC a | ≤0.10 | ≤0.50 | ≤0.035 | ≤0.025 | ≥0.015 | - | |||||
BLD a | ≤0.08 | ≤0.45 | ≤0.030 | ≤0.025 | ≥0.015 | - | |||||
BUSD | ≤0.010 | ≤0.40 | ≤0.025 | ≤0.020 | ≥0.015 | ≤0.20 b | |||||
BUFD | ≤0.008 | ≤0.30 | ≤0.020 | ≤0.020 | ≥0.015 | ≤0.20 b | |||||
BSUFD | ≤0.006 | ≤0.30 | ≤0.020 | ≤0.020 | ≥0.015 | ≤0.20 b | |||||
a 允許添加Nb和/或Ti。 b 允許用Nb代替部分Ti,此時Nb和Ti的總含量不大于0.20%。 |
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