SAE A 646 Grade HP 9-4-20
Chemical composition(mass fraction)(wt.%)
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.17 | 0.23 | ||
| Si | 0.10 | |||
| Mn | 0.20 | |||
| Ni | 0.65 | |||
| Cr | 0.40 | |||
| Al | 4.25 | 4.75 | ||
| Cu | ||||
| Ti | ||||
| Fe | ||||
| Mo | 0.85 | |||
| Co | 8.50 | 9.50 | ||
| V | 0.06 | 0.12 | ||
| P | 0.01 | |||
| S | 0.01 | |||
| W | 0.90 | 1.10 |
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