
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 |




