牌号 |
质量 等级 |
化学成分(质量分数)/% | ||||||||||||||
C | Si | Mn | P | S | Nb | V | Ti | Cr | Ni | Cu | Mo | B | N | Als | ||
不大于 | 不小于 | |||||||||||||||
Q235q |
C |
≤0.017 |
≤ 0.35 |
≤ 1.40 |
0.030 | 0.030 |
--- |
--- |
--- |
0.30 |
0.30 |
0.30 |
--- |
--- |
0.012 |
0.015 |
D | 0.025 | 0.025 | ||||||||||||||
E | 0.020 | 0.010 | ||||||||||||||
Q345q |
C |
≤0.20 ≤0.18 ≤0.18 |
≤ 0.55 |
0.90~ 1.70 |
0.030 | 0.025 |
0.06 |
0.08 |
0.03 |
0.08 |
0.50 |
0.55 |
0.20 |
--- |
0.012 |
0.015 |
D | 0.025 | 0.020 | ||||||||||||||
E | 0.020 | 0.010 | ||||||||||||||
Q370q |
C |
≤0.18 |
≤ 0.55 |
1.00~ 1.70 |
0.030 | 0.025 |
0.06 |
0.08 |
0.03 |
0.08 |
0.50 |
0.55 |
0.20 |
0.004 |
0.012 |
0.015 |
D | 0.025 | 0.020 | ||||||||||||||
E | 0.020 | 0.010 | ||||||||||||||
Q420q |
C |
≤0.18 |
≤ 0.55 |
1.00~ 1.70 |
0.030 | 0.025 |
0.06 |
0.08 |
0.03 |
0.08 |
0.70 |
0.55 |
0.35 |
0.004 |
0.012 |
0.015 |
D | 0.025 | 0.020 | ||||||||||||||
E | 0.020 | 0.010 | ||||||||||||||
. Q460q |
C |
≤0.18 |
≤ 0.55 |
1.00~ 1.80 |
0.030 | 0.020 |
0.06 |
0.08 |
0.03 |
0.08 |
0.70 |
0.55 |
0.35 |
0.004 |
0.012 |
0.015 |
D | 0.025 | 0.015 | ||||||||||||||
E | 0.020 | 0.010 | ||||||||||||||
Q500q | D | ≤0.18 | ≤0.55 |
1.00~ 1.70 |
0.025 | 0.015 | 0.06 | 0.08 | 0.03 | 0.08 | 1.00 | 0.55 | 0.40 | 0.004 | 0.012 | 0.015 |
E | 0.025 | 0.010 | ||||||||||||||
Q550q | D | ≤0.18 | ≤0.55 |
1.00~ 1.70 |
0.025 | 0.015 | 0.06 | 0.08 | 0.03 | 0.08 | 1.00 | 0.55 | 0.40 | 0.004 | 0.012 | 0.015 |
E | 0.025 | 0.010 | ||||||||||||||
Q620q | D | ≤0.18 | ≤≤0.55 |
1.00~ 1.70 |
0.025 | 0.015 | 0.06 | 0.08 | 0.03 | 0.08 | 1.10 | 0.55 | 0.60 | 0.004 | 0.012 | 0.015 |
E | 0.025 | 0.010 | ||||||||||||||
Q690q | D | ≤0.18 | ≤0.55 |
1.00~ 1.70 |
0.025 | 0.015 | 0.09 | 0.08 | 0.03 | 0.08 | 1.10 | 0.55 | 0.60 | 0.004 | 0.012 | 0.015 |
E | 0.025 | 0.010 | ||||||||||||||
a当碳当量不大于0.12%时,Mn含量上限可达到2.00%。订货137/8188/0376/ |
Z向性能级别 | Z15 | Z25 | Z35 |
S/% | ≤0.010 | ≤0.007 | ≤0.005 |
牌号 | 交货状态 | 碳当量CEV/% | |
厚度≤50mm | 厚度>50mm—100mm | ||
Q345q |
热轧、控轧、正火/正火轧制 |
≤0.42 | ≤0.43 |
Q370q | ≤0.43 | ≤0.44 | |
Q420q | ≤0.44 | ≤0.45 | |
Q460q | ≤0.46 | ≤0.50 |
牌号 | 交货状态 | 碳当量CEV/% | |
厚度≤50mm | 厚度>50mm—100mm | ||
Q345q |
热机械轧制 (TMCP) |
≤0.38 | ≤0.40 |
Q370q | ≤0.40 | ≤0.42 | |
Q420q | ≤0.44 | ≤0.46 | |
Q460q | ≤0.45 | ≤0.47 |
牌号 | 交货状态 | 碳当量CEV/% | |
厚度≤50mm | 厚度>50mm—100mm | ||
Q460q |
淬火加回火 热机械轧制(TMCP) 热机械轧制(TMCP)+回火 |
≤0.46 | ≤0.48 |
Q500q | ≤0.46 | ≤0.56 | |
Q550q | ----- | ----- | |
Q620q | ------ | 137-8188-0376- | |
Q690q | ------- | ----- |
牌号 | Pcm/% | 牌号 | Pcm/% |
Q420q | ≤0.20 | Q550q | ≤0.25 |
Q460q | ≤0.23 | Q620q | ≤0.25 |
Q500q | ≤0.23 | Q690q | ≤0.27 |
牌号 |
质量等级 |
拉伸试验 | V型冲击试验 | ||||
下屈服强度 Rd/MPa |
抗拉强度 Rm/MPa |
断后伸长 A/% |
试验温度/℃ | 冲击吸收能量KV2/J | |||
厚度/mm | |||||||
≤50 | >50~100 | ||||||
不小于 | 不小于 | ||||||
Q235q |
C |
235 |
225 |
400 |
26 |
0 |
34 |
D | -20 | ||||||
E | -40 | ||||||
Q345q |
C |
345 |
335 |
490 |
20 |
0 |
47 |
D | -20 | ||||||
E | -40 | ||||||
Q370q |
C |
370 |
360 |
510 |
20 |
0 |
47 |
D | -20 | ||||||
E | -40 | ||||||
Q420q |
C |
420 |
410 |
540 |
19 |
0 |
47 |
D | -20 | ||||||
E | -40 | ||||||
Q460q |
C |
460 |
450 |
570 |
17 |
0 |
47 |
D | -20 | ||||||
E | -40 | ||||||
Q500q |
D |
500 |
480 |
600 |
16 |
-20 |
47 |
E | -40 | ||||||
Q550q |
D |
550 |
530 |
660 |
16 |
-20 |
47 |
E | -40 | ||||||
Q620q |
D |
620 |
.580 |
720 |
15 |
-20 |
47 |
E | -40 | ||||||
Q690q |
D |
690 |
650 |
770 |
14 |
-20 |
47 |
E |
-40 |