 
    Composition on ingredients
| Element Material | C | Si | Mn | P | S | Ni | Cr | N | Cu | Mo | Fe | Al | B | Ti | Cb | 
| 302 | ≤0.15 | ≤1.0 | ≤2.0 | ≤0.045 | ≤0.03 | 8.0-10.0 | 17.0-19.0 | / | / | / | Balance | / | / | / | / | 
 
    | Element Material | C | Si | Mn | P | S | Ni | Cr | N | Cu | Mo | Fe | Al | B | Ti | Cb | 
| 302 | ≤0.15 | ≤1.0 | ≤2.0 | ≤0.045 | ≤0.03 | 8.0-10.0 | 17.0-19.0 | / | / | / | Balance | / | / | / | / |