ASTM M30
Chemical composition(mass fraction)(wt.%)
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.75 | 0.85 | ||
| Si | 0.20 | 0.45 | ||
| Mn | 0.15 | 0.40 | ||
| P | 0.030 | |||
| S | 0.030 | |||
| Cr | 3.50 | 4.25 | ||
| Mo | 7.75 | 9.00 | ||
| V | 1.00 | 1.40 | ||
| W | 1.30 | 2.30 | ||
| Co | 4.50 | 5.50 |
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