国内阀门材料常用技术标准 低合金高强度结构钢化学成分
牌号 |
质量 等级 |
化 学 成 分, % | ||||||||||
C ≤ |
Mn |
Si ≤ |
P ≤ |
S ≤ |
V | Nb | Ti |
Al ≥ |
Cr ≤ |
Ni ≤ |
||
Q295 |
A B |
0.16 0.16 |
0.08~1.50 0.08~1.50 |
0.55 0.55 |
0.045 0.040 |
0.045 0.040 |
0.02~0.15 0.02~0.15 |
0.015~0.060 0.015~0.060 |
0.02~0.20 0.02~0.20 |
— — |
||
Q345 |
A B C D E |
0.20 0.20 0.20 0.18 0.18 |
1.00~1.60 1.00~1.60 1.00~1.60 1.00~1.60 1.00~1.60 |
0.55 0.55 0.55 0.55 0.55 |
0.045 0.040 0.035 0.030 0.025 |
0.045 0.040 0.035 0.030 0.025 |
0.02~0.15 0.02~0.15 0.02~0.15 0.02~0.15 0.02~0.15 |
0.015~0.060 0.015~0.060 0.015~0.060 0.015~0.060 0.015~0.060 |
0.02~0.20 0.02~0.20 0.02~0.20 0.02~0.20 0.02~0.20 |
— — 0.015 0.015 0.015 |
||
Q390 |
A B C D E |
0.20 0.20 0.20 0.20 0.20 |
1.00~1.60 1.00~1.60 1.00~1.60 1.00~1.60 1.00~1.60 |
0.55 0.55 0.55 0.55 0.55 |
0.045 0.040 0.035 0.030 0.025 |
0.045 0.040 0.035 0.030 0.025 |
0.02~0.20 0.02~0.20 0.02~0.20 0.02~0.20 0.02~0.20 |
0.015~0.060 0.015~0.060 0.015~0.060 0.015~0.060 0.015~0.060 |
0.02~0.20 0.02~0.20 0.02~0.20 0.02~0.20 0.02~0.20 |
— — 0.015 0.015 0.015 |
0.30 0.30 0.30 0.30 0.30 |
0.70 0.70 0.70 0.70 0.70 |
Q420 |
A B C D E |
0.20 0.20 0.20 0.20 0.20 |
1.00~1.70 1.00~1.70 1.00~1.70 1.00~1.70 1.00~1.70 |
0.55 0.55 0.55 0.55 0.55 |
0.045 0.040 0.035 0.030 0.025 |
0.045 0.040 0.035 0.030 0.025 |
0.02~0.20 0.02~0.20 0.02~0.20 0.02~0.20 0.02~0.20 |
0.015~0.060 0.015~0.060 0.015~0.060 0.015~0.060 0.015~0.060 |
0.02~0.20 0.02~0.20 0.02~0.20 0.02~0.20 0.02~0.20 |
— — 0.015 0.015 0.015 |
0.40 0.40 0.40 0.40 0.40 |
0.70 0.70 0.70 0.70 0.70 |
Q460 |
C D E |
0.20 0.20 0.20 |
1.00~1.70 1.00~1.70 1.00~1.70 |
0.55 0.55 0.55 |
0.035 0.030 0.025 |
0.035 0.030 0.025 |
0.02~0.20 0.02~0.20 0.02~0.20 |
0.015~0.060 0.015~0.060 0.015~0.060 |
0.02~0.20 0.02~0.20 0.02~0.20 |
0.015 0.015 0.015 |
0.70 0.70 0.70 |
0.70 0.70 0.70 |
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