Q345B無(wú)縫鋼管鋼的熔煉成分應(yīng)符合下表的規(guī)定
級(jí)別 |
化學(xué)成分% |
C |
Mn |
P≤ |
S≤ |
Si |
Cr |
Mo |
V≥ |
P11 |
0.05-0.15 |
0.30-0.60 |
0.025 |
0.025 |
0.50-1.00 |
1.00-1.50 |
0.44-0.65 |
|
P12 |
0.05-0.15 |
0.30-0.61 |
0.025 |
0.025 |
≤0.50 |
0.80-1.25 |
0.44-0.65 |
|
P22 |
0.05-0.15 |
0.30-0.60 |
0.025 |
0.025 |
≤0.50 |
1.90-2.60 |
0.87-1.13 |
|
P23 |
0.04-0.10 |
0.10-0.60 |
0.030 |
0.010 |
≤0.50 |
1.90-2.60 |
0.05-0.30 |
0.20-0.30 |
P91 |
0.08-0.12 |
0.30-0.60 |
0.020 |
0.010 |
0.20-0.50 |
8.0-9.5 |
0.85-1.05 |
0.18-0.25 |
P92 |
0.07-0.13 |
0.30-0.60 |
0.020 |
0.010 |
≤0.50 |
8.50-9.50 |
0.30-0.60 |
0.15-0.25 |
注:P23中其他元素的含量:W:1.45~1.75,Nb:0.02~0.08,B:0.0005~0.006,N≤0.03,AL≤0.03
Q345B無(wú)縫鋼管 中其他元素的含量:Nb:0.06~0.10,N:0.03~0.07,Ni≤0.40,AL≤0.04
Q345B無(wú)縫鋼管 中其他元素的含量:W:1.5~2.0,Nb:0.04~0.09,B:0.001~0.006,N:0.03~0.07,Ni≤0.40,AL≤0.04
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