SAE A 409 S31040
Chemical composition(mass fraction)(wt.%)
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.08 | |||
| Mn | 2.00 | |||
| Si | 1.50 | |||
| P | 0.045 | |||
| S | 0.03 | |||
| Cr | 24.00 | 26.00 | ||
| Ni | 19.00 | 22.00 | ||
| Mo | ||||
| Nb+Ta | 10×C％ | 1.10 |
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