C | 0.15-0.18% |
Si | 0.30-0.50% |
Mn | 1.30-1.50% |
P | ≤0.015% |
S | ≤0.004% |
Cr | ≤0.30% |
Ni | ≤0.50% |
Mo | ≤0.10% |
Cu | ≤0.30% |
V | ≤0.15% |
Nb | ≤0.05% |
Ti | ≤0.05% |
屈服强度Rp | 0.2≥275MPa |
抗拉强度Rm | 450~600MPa |
伸长率 | A≥18% |
-20冲击功 | KV2≥47J。 |
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