SAE A 646 Grade Nit. 135
Chemical composition(mass fraction)(wt.%)
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.38 | 0.43 | ||
| Si | 0.20 | 0.40 | ||
| Mn | 0.50 | 0.70 | ||
| Cr | ||||
| Ni | 0.30 | 0.40 | ||
| Mo | ||||
| Co | ||||
| W | 0.95 | 1.30 | ||
| Al | ||||
| Cu | ||||
| Ti | ||||
| Fe |
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