ASTM T4
Chemical composition(mass fraction)(wt.%)
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.70 | 0.80 | ||
| Si | 0.20 | 0.40 | ||
| Mn | 0.10 | 0.40 | ||
| P | 0.030 | |||
| S | 0.030 | |||
| Cr | 3.75 | 4.50 | ||
| Mo | 0.40 | 1.00 | ||
| V | 0.80 | 1.20 | ||
| W | 17.50 | 19.00 | ||
| Co | 4.25 | 5.75 |
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