ASTM P21
Chemical composition(mass fraction)(wt.%)
| C(％) | Si(％) | Mn(％) | P(％) | S(％) | Cr(％) | Ni(％) | V(%) | Al(%) |
|---|---|---|---|---|---|---|---|---|
| 0.18～0.22 | 0.20～0.40 | 0.20～0.40 | ≤0.030 | ≤0.030 | 0.50～0.30 | 3.90～4.25 | 0.15～0.25 | 1.05～1.25 |
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