No | Author | C | Mn | Si | Cu | Ni | Cr | Mo | Nb | V | B |
1 | IIW | 1 | 6 | 24 | 5 | 5 | 15 | 5 | - | 15 | - |
2 | AWS | 1 | 6 | 38 | - | 1.8 | 12 | 4 | - | 9.1 | - |
3 | Ito Bessyo | 1 | 20 | 30 | 20 | 60 | 20 | 15 | - | 10 | 1/5 |
4 | Yurioka (8) | 1 | 6 | 24 | 13 | 40 | 6 | 4 | 5 | 5 | 1/10 |
5 | Suzuki (14) | 1 | 6 | 24 | 15 | 15 | 5 | 5 |
| 3 | 1/15 |