牌号 | 化学成分(质量分数)/% | ||||||||
Q345R | Fe | C | Si | Mn | Cu | Ni | Cr | Mo | Nb |
余量 | ≤0.2 | ≤0.55 | 1.2~1.7 | ≤0.3 | ≤0.3 | ≤0.3 | ≤0.08 | ≤0.05 | |
V | Ti | Al | P | S | 其他(Cu + Ni + Cr + Mo) | ||||
≤0.05 | ≤0.03 | ≥0.02 | ≤0.025 | ≤0.01 | ≤0.7 |