ASTM T4
Chemical composition(mass fraction)(wt.%)
| C(％) | Si(％) | Mn(％) | P(％) | S(％) | Cr(％) | Mo(％) | V(%) | W(%) | Co(%) |
|---|---|---|---|---|---|---|---|---|---|
| 0.70～0.80 | 0.20～0.40 | 0.10～0.40 | ≤0.030 | ≤0.030 | 3.75～4.50 | 0.40～1.00 | 0.80～1.20 | 17.5～19.0 | 4.25～5.75 |
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