来源：
山东无缝钢管厂 http://www.yaogangguan.cn
| 标准 |
牌号 |
化学成分（％） |
| C |
Si |
Mn |
P |
S |
Cr |
Ni |
Cu |
Mo |
V |
Al |
| ASTM A333 |
Grade 1 |
≤0.30 |
|
0.40～1.06 |
≤0.025 |
≤0.025 |
|
|
|
|
|
|
| Grade 3 |
≤0.19 |
0.18～0.37 |
0.31～0.64 |
≤0.025 |
≤0.025 |
|
3.18～3.82 |
|
|
|
|
| Grade 4 |
≤0.12 |
0.18～0.37 |
0.50～1.05 |
≤0.025 |
≤0.025 |
0.44～1.01 |
0.47～0.98 |
0.40～0.75 |
|
|
0.04～0.30 |
| Grade 6 |
≤0.30 |
≥0.10 |
0.29～1.06 |
≤0.025 |
≤0.025 |
|
|
|
|
|
|
| Grade 7 |
≤0.19 |
0.13～0.32 |
≤0.90 |
≤0.025 |
≤0.025 |
|
2.03～2.57 |
|
|
|
|
| Grade 8 |
≤0.13 |
0.13～0.32 |
≤0.90 |
≤0.025 |
≤0.025 |
|
8.40～9.60 |
|
|
|
|
| Grade 9 |
≤0.20 |
|
0.40～1.06 |
≤0.025 |
≤0.025 |
|
1.60～2.24 |
0.75～1.25 |
|
|
|
| Grade 10 |
≤0.20 |
0.10～0.35 |
1.15～1.50 |
≤0.03 |
≤0.015 |
≤0.15 |
≤0.25 |
≤0.015 |
≤0.50 |
≤0.12 |
≤0.06 |
| Grade 11 |
≤0.10 |
≤0.35 |
≤0.6 |
≤0.025 |
≤0.025 |
≤0.50 |
35.0～37.0 |
|
≤0.50 |
|
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