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	| 标准 | 牌号 | 化学成分 | |||||||
| C | Si | Mn | P | S | Cr | Ni | Cu | ||
| GB/T8163 | 10 | 0.07~0.14 | 0.17~0.37 | 0.35~0.65 | ≤0.035 | ≤0.035 | ≤0.15 | ≤0.25 | ≤0.25 | 
| 20 | 0.17~0.24 | 0.17~0.37 | 0.35~0.65 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.25 | ≤0.25 | |
| Q345 | 0.12~0.20 | 0.20~0.55 | 1.20~1.60 | ≤0.045 | ≤0.045 | / | / | / | |
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