B.S. NA21
Chemical composition(mass fraction)(wt.%)
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.10 | |||
| Si | 0.50 | |||
| Mn | 0.50 | |||
| P | 0.015 | |||
| S | 0.015 | |||
| Cr | 20.00 | 23.00 | ||
| Ni | 58.00 | |||
| Mo | 8.00 | 10.00 | ||
| Al | 0.40 | |||
| Cu | ||||
| Ti | 0.40 | |||
| Fe | 5.00 | |||
| Co | 1.00 | |||
| Nb+Ta | 3.15 | 4.15 |
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