ASTM A9
Chemical composition(mass fraction)(wt.%)
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.45 | 0.55 | ||
| Si | 0.95 | 1.15 | ||
| Mn | 0.20 | 0.50 | ||
| P | 0.030 | |||
| S | 0.030 | |||
| Cr | 4.75 | 5.50 | ||
| Mo | 1.30 | 1.80 | ||
| V | 0.80 | 1.40 | ||
| W | ||||
| Ni＋Cu | 0.75 | |||
| Ni | 1.25 | 1.75 |
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