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| 牌號 | 化學成分（熔煉分析） % （質量分數） | ||||||||||
| C | Mn | P | S | Alt | Ti | ||||||
| DC01 a | ≤0.10 | ≤0.50 | ≤0.035 | ≤0.025 | ≥0.015 | － | |||||
| DC03 a | ≤0.08 | ≤0.45 | ≤0.030 | ≤0.025 | ≥0.015 | － | |||||
| DC04 a | ≤0.08 | ≤0.40 | ≤0.025 | ≤0.020 | ≥0.015 | － | |||||
| DC05 | ≤0.008 | ≤0.30 | ≤0.020 | ≤0.020 | ≥0.015 | ≤0.20 b | |||||
| DC06 | ≤0.006 | ≤0.30 | ≤0.020 | ≤0.020 | ≥0.015 | ≤0.20 b | |||||
| DC07 | ≤0.006 | ≤0.25 | ≤0.020 | ≤0.020 | ≥0.015 | ≤0.20 b | |||||
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a 允許添加Nb和/或Ti。 b 允許用Nb代替部分Ti，此時Nb和Ti的總含量應不大于0.20%。 |
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