GOST 55X20H4AΓ9M
Chemical composition(mass fraction)(wt.%)
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.50 | 0.60 | ||
| Si | 0.45 | |||
| Mn | 8.00 | 10.00 | ||
| P | 0.040 | |||
| S | 0.030 | |||
| Cr | 20.00 | 22.00 | ||
| Ni | 3.50 | 4.50 | ||
| Mo | ||||
| N | 0.30 | 0.60 |
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