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| C | Cr | Ni | Mo | Al | Ti | Fe | Nb |
| 0.08¡«0.16 | 11.5¡«13.5 | Óà | 3.8¡«4.8 | 5.5¡«6.4 | 0.5¡«1.0 | ≤1.0 | 1.8¡«2.5 |
| B | Zr | Mn | Si | P | S | Pb | Bi |
| 0.008¡«0.020 | 0.06¡«0.15 | ≤0.5 | ≤0.5 | ≤0.015 | ≤0.01 | ≤0.001 | ≤0.0001 |