| Chinese | American | German | Japanese |
| GB | AISI | DIN | JIS |
| 9CrWMn | O1 | 1.2510 | SKS3 |
| Grade | C | Si | Mn | P | S | V | W | Cr |
| 1.2510 | 0.90-1.05 | 0.15-0.35 | 1.0-1.2 | ≤0.035 | ≤0.035 | 0.05-0.15 | 0.5-0.7 | 0.5-0.7 |
| 9CrWMn | 0.85-0.95 | ≤0.4 | 0.9-1.2 | ≤0.035 | ≤0.035 | / | 0.5-0.8 | 0.5-0.8 |
| O1 | 0.85-0.95 | 0.2-0.4 | 1.0-1.3 | ≤0.035 | ≤0.035 | 0.2 | 0.4-0.6 | 0.4-0.6 |
| Shape |
Thickness/
Diameter |
Width | Length |
| Flat bar | 6-110 | 155-610 | 3000-6000 |
| Round bar | 14-100 | / | 3000-6000 |
| Technique | Heating Temperature/ºC | Cooling | Hardness/HRC |
| Quenching | 820-840 | Oil | 64-66 |
| Tempering | 160-180 | Air | ≥62 |