KS STR661
Chemical composition(mass fraction)(wt.%)
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.08 | 0.16 | ||
| Si | 1.00 | |||
| Mn | 1.00 | 2.00 | ||
| P | 0.04 | |||
| S | 0.03 | |||
| Cr | 20.00 | 22.50 | ||
| Ni | 19.00 | 21.00 | ||
| Mo | 2.50 | 3.50 | ||
| N | 0.10 | 0.20 | ||
| Co | 18.50 | 21.00 | ||
| W | 2.00 | 3.00 | ||
| Nb | 0.75 | 1.25 |
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