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| C(％) | Si(％) | Mn(％) | P(％) | S(％) | Cr(％) | Ni(％) | W(%) |
|---|---|---|---|---|---|---|---|
| 0.45-0.55 | Max 0.45 | 8.00-10.0 | Max 0.040 | Max 0.030 | 20.0-22.0 | 3.50-5.00 | 0.80-1.50 |
| Nb(%) | Ta(%) | Other(%) | |||||
| 1.80-2.50 | 1.80-2.50 | N0.40-0.60 |
| Rp0.2 (MPa) | Rm (MPa) | Impact KV (J) |
Elongation A (%) |
A Z (%) | Delivery | Hardness HB |
|---|---|---|---|---|---|---|
| 426 (≥) | 443 (≥) | 12 | 34 | 34 | Solution & Aging, Ann, Ausaging, Q+T | 313 |