| アイテム | 600 | 601 | 617 | 625 | 690 | 718 | X750 | 825 |
| C | ≤0.15 | ≤0.1 | 0.05~0.15 | ≤0.08 | ≤0.05 | ≤0.08 | ≤0.08 | ≤0.05 |
| Mn | ≤1 | ≤1.5 | ≤0.5 | ≤0.35 | ≤0.5 | ≤0.35 | ≤1 | ≤1 |
| Fe | 6-10 | 休む | ≤3 | 休む | 7-11 | 休む | 5-9 | 22歳以上 |
| P | ≤0.015 | ≤0.02 | ≤0.015 | – | – | – | – | – |
| S | ≤0.015 | ≤0.015 | ≤0.015 | ≤0.015 | ≤0.015 | ≤0.01 | ≤0.01 | ≤0.03 |
| Si | ≤0.5 | ≤0.5 | ≤0.5 | ≤0.35 | ≤0.5 | ≤0.35 | ≤0.5 | ≤0.5 |
| Cu | ≤0.5 | ≤1 | – | ≤0.3 | ≤0.5 | ≤0.3 | ≤0.5 | 1.5-3 |
| Ni | 72歳以上 | 58-63 | ≥44.5 | 50~55 | 58歳以上 | 50~55 | 70歳以上 | 38-46 |
| Co | – | – | 10-15 | ≤10 | – | ≤1 | ≤1 | – |
| Al | – | 1-1.7 | 0.8~1.5 | ≤0.8 | – | 0.2~0.8 | 0.4-1 | ≤0.2 |
| Ti | – | – | ≤0.6 | ≤1.15 | – | – | 2.25~2.75 | 0.6~1.2 |
| Cr | 14-17 | 21-25 | 20-24 | 17-21 | 27-31 | 17-21 | 14-17 | 19.5~23.5 |
| Nb+Ta | – | – | – | 4.75~5.5 | – | 4.75~5.5 | 0.7-1.2 | – |
| Mo | – | – | 8-10 | 2.8~3.3 | – | 2.8~3.3 | – | 2.5~3.5 |
| B | – | – | ≤0.006 | – | – | – | – | – |

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