ASTM P20
Chemical composition(mass fraction)(wt.%)
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.28 | 0.40 | ||
| Si | 0.20 | 0.80 | ||
| Mn | 0.60 | 1.00 | ||
| P | 0.030 | |||
| S | 0.030 | |||
| Cr | 1.40 | 2.00 | ||
| Mo | 0.30 | 0.55 | ||
| V | ||||
| W | ||||
| Ni＋Cu | 0.75 |
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