碳 C :3.70~4.00%
硅 Si:2.15~2.93%
锰 Mn:0.46~0.66%
硫 S :0.010~0.016%
磷 P :0.027~0.035%
镁 Mg:0.027~0.050%
稀土Re:0.026~0.043%
碳当量:4.3~4.6
抗拉强度 σb (MPa):≥450
条件屈服强度 σ0.2 (MPa):≥310
伸长率 δ (%):≥10
硬度 :160~210HB
碳 C :3.70~4.00%
硅 Si:2.15~2.93%
锰 Mn:0.46~0.66%
硫 S :0.010~0.016%
磷 P :0.027~0.035%
镁 Mg:0.027~0.050%
稀土Re:0.026~0.043%
碳当量:4.3~4.6
抗拉强度 σb (MPa):≥450
条件屈服强度 σ0.2 (MPa):≥310
伸长率 δ (%):≥10
硬度 :160~210HB