SAE A 959 S21500
Chemical composition(mass fraction)(wt.%)
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.15 | |||
| Mn | 5.50 | 7.00 | ||
| Si | 1.20 | |||
| P | 0.04 | |||
| S | 0.03 | |||
| Cr | 14.00 | 16.00 | ||
| Ni | 9.00 | 11.00 | ||
| Mo | ||||
| B | 0.003 | 0.009 | ||
| Nb | 0.75 | 1.25 | ||
| V | 0.15 | 0.40 |
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