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| 二、冷镦钢硼钢系列化学成分 | ||||||||||
| 牌号 | 化学成分(%) | 执行标准 | ||||||||
| C | Si | Mn | P | S | Cr | B | Ni | 其它 | ||
| 10B21 | 0.18~0.23 | ≤0.10 | 0.70~1.00 | ≤0.020 | ≤0.020 | ＿ | 0.0008~0.0035 | ＿ | ＿ | SAE J403 |
| 10B30 | 0.28~0.34 | ≤0.30 | 0.80~1.00 | ≤0.020 | ≤0.020 | 0.10~0.25 | 0.0005~0.0030 | ＿ | Mo：≤0.06 | |
| 10B33 | 0.30~0.36 | ≤0.10 | 0.70~1.00 | ≤0.020 | ≤0.020 | ＿ | 0.0008~0.0050 | ＿ | ＿ | |
| 10B38 | 0.35~0.42 | ≤0.10 | 0.60~0.90 | ≤0.020 | ≤0.020 | ＿ | 0.0008~0.0050 | ＿ | ＿ | |
| 15B25M | 0.23~0.28 | ≤0.35 | 0.90~1.20 | ≤0.020 | ≤0.020 | ≤0.40 | 0.0005~0.0030 | ≤0.25 | Cu:≤0.30 Ti/N:≥3.5 | BQB/517 |
| 17B2 | 0.15~0.20 | ≤0.30 | 0.60~0.90 | ≤0.025 | ≤0.025 | ≤0.30 | 0.0008~0.0050 | ＿ | Cu:≤0.25 | EN10263-4 |
| 20MnB4 | 0.18~0.23 | ≤0.30 | 0.90~1.20 | ≤0.025 | ≤0.025 | ≤0.30 | 0.0008~0.0050 | ＿ | Cu:≤0.25 | |
| 23MnB4 | 0.20~0.25 | ≤0.30 | 0.90~1.20 | ≤0.025 | ≤0.025 | ≤0.30 | 0.0008~0.0050 | Cu:≤0.25 | ||
| 30MnB4 | 0.27~0.32 | ≤0.30 | 0.80~1.10 | ≤0.025 | ≤0.025 | ≤0.30 | 0.0008~0.0050 | Cu:≤0.25 | ||
| 37MnB5 | 0.37~0.41 | ≤0.30 | 1.15~1.45 | ≤0.025 | ≤0.025 | ＿ | 0.0008~0.0050 | ＿ | ＿ | |
| ML20MnTiB | 0.18~0.23 | 0.10~0.30 | 1.30~1.60 | ≤0.025 | ≤0.025 | ＿ | 0.0008~0.0035 | ＿ | Ti:0.04~0.10 Al：≥0.02 | GB/T6478 |
| ❉如有特殊牌号，可定制！ | ||||||||||
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