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高强度结构钢化学成分
钢号 | C | Si | Mn | P≤ | S≤ | Cr | Ni | Mo | 其他 |
Q420C | ≤0.20 | ≤0.55 | 1.00-1.60 | 0.035 | 0.030 | ≤0.30 | ≤0.70 | ≤0.20 | V. NB Ti |
Q420D | ≤0.18 | ≤0.55 | 1.00-1.60 | 0.030 | 0.030 | ≤0.30 | ≤0.70 | ≤0.20 | V. NB Ti |
Q420E | ≤0.18 | ≤0.55 | 1.00-1.60 | 0.025 | 0.025 | ≤0.30 | ≤0.70 | ≤0.20 | V. NB Ti |
Q460C | ≤0.18 | ≤0.55 | 1.00-1.60 | 0.035 | 0.030 | ≤0.30 | ≤0.70 | ≤0.20 | V. NB Ti |
Q460D | ≤0.18 | ≤0.55 | 1.00-1.60 | 0.030 | 0.030 | ≤0.30 | ≤0.70 | ≤0.20 | V. NB Ti |
Q460E | ≤0.18 | ≤0.55 | 1.00-1.60 | 0.025 | 0.025 | ≤0.30 | ≤0.70 | ≤0.20 | V. NB Ti |
Q500D | ≤0.18 | ≤0.55 | 1.00-1.60 | 0.030 | 0.030 | ≤0.60 | ≤1.00 | ≤0.40 | B≤0.003 V. NB Ti |
Q500E | ≤0.18 | ≤0.55 | 1.00-1.60 | 0.025 | 0.025 | ≤0.60 | ≤1.00 | ≤0.40 | B≤0.003 V. NB Ti |
Q550D | ≤0.18 | ≤0.55 | 1.00-1.60 | 0.030 | 0.030 | ≤0.60 | ≤1.00 | ≤0.40 | B≤0.003 V. NB Ti |
Q550E | ≤0.18 | ≤0.55 | 1.00-1.60 | 0.025 | 0.025 | ≤0.60 | ≤1.00 | ≤0.40 | B≤0.003 V. NB Ti |
Q620D | ≤0.18 | ≤0.55 | 1.00-1.60 | 0.030 | 0.030 | ≤0.80 | ≤1.20 | ≤0.60 | B≤0.003 V. NB Ti |
Q620E | ≤0.18 | ≤0.55 | 1.00-1.60 | 0.025 | 0.025 | ≤0.80 | ≤1.20 | ≤0.60 | B≤0.003 V. NB Ti |
Q690D | ≤0.18 | ≤0.55 | 1.00-1.60 | 0.030 | 0.030 | ≤1.20 | ≤1.50 | ≤0.60 | B≤0.003 V. NB Ti |
Q690E | ≤0.18 | ≤0.55 | 1.00-1.60 | 0.025 | 0.025 | ≤1.20 | ≤1.50 | ≤0.60 | B≤0.003 V. NB Ti |
高强度结构钢的力学性能
钢号 | 质量等级 | 屈服强度 σ5≥/MPA | 抗拉强度 σb/MPa | 伸长率 σ5(％) | 冲击吸收功 | 180度冷弯试验d-内侧直径 a-厚度 | |||
≤50 | ＞50-100 | 0度 | -20度 | -40度 | |||||
Q420 | C-D-E | 420 | 400 | 520-670 | 18 | 40 | 40 | 27 | d=3a |
Q460 | C-D-E | 460 | 440 | 550-710 | 17 | 40 | 40 | 27 | d=3a |
Q500 | D-E | 500 | 480 | 610-770 | 16 |
| 40 | 27 | d=3a |
Q550 | D-E | 550 | 530 | 670-830 | 16 |
| 40 | 27 | d=3a |
Q620 | D-E | 620 | 600 | 720-890 | 15 |
| 40 | 27 | d=3a |
Q690 | D-E | 690 | 670 | 770-940 | 14 |
| 40 | 27 | d=3a |
