Q345B無縫鋼管高強(qiáng)度結(jié)構(gòu)鋼的牌號和化學(xué)成分
牌號 |
等 級 |
化學(xué)成分(質(zhì)量分?jǐn)?shù))(%) | ||||||||||
C ≤ |
Mn |
Si ≤ |
P ≤ |
S ≤ |
V |
Nb |
Ti |
A1 ≥ |
Cr ≤ |
Ni ≤ | ||
Q295 |
A |
0.16 |
0.80-1.50 |
0.55 |
0.045 |
0.045 |
0.02-0.15 |
0.015-0.060 |
0.02-0.20 |
|||
B |
0.040 |
0.040 |
||||||||||
Q345 |
A |
0.20 |
1.00-1.60 |
0.55 |
0.045 |
0.045 |
0.02-0.15 |
0.015-0.060 |
0.02-0.20 |
|||
B |
0.040 |
0.040 |
||||||||||
C |
0.035 |
0.035 |
0.015 |
|||||||||
D |
0.18 |
0.030 |
0.030 |
0.015 |
||||||||
E |
0.025 |
0.025 |
0.015 |
|||||||||
Q390 |
A |
0.20 |
1.00-1.60 |
0.55 |
0.045 |
0.045 |
0.02-0.20 |
0.015-0.060 |
0.02-0.20 |
0.30 |
0.70 | |
B |
0.040 |
0.040 |
0.30 |
0.70 | ||||||||
C |
0.035 |
0.035 |
0.015 |
0.30 |
0.70 | |||||||
D |
0.030 |
0.030 |
0.015 |
0.30 |
0.70 | |||||||
E |
0.025 |
0.025 |
0.015 |
0.30 |
0.70 | |||||||
Q420 |
A |
0.20 |
1.00-1.70 |
0.55 |
0.045 |
0.045 |
0.02-0.20 |
0.015-0.060 |
0.02-0.20 |
0.40 |
0.70 | |
B |
0.040 |
0.040 |
0.40 |
0.70 | ||||||||
C |
0.035 |
0.035 |
0.015 |
0.40 |
0.70 | |||||||
D |
0.030 |
0.030 |
0.015 |
0.40 |
0.70 | |||||||
E |
0.025 |
0.025 |
0.015 |
0.40 |
0.70 | |||||||
Q460 |
C |
0.20 |
1.00-1.70 |
0.55 |
0.035 |
0.035 |
0.02-0.20 |
0.015-0.060 |
0.02-0.20 |
0.015 |
0.70 |
0.70 |
D |
0.030 |
0.030 |
0.015 |
0.70 |
0.70 |