| 现 6 . | 无缝钢管 | 山东 | 12×1 | 20#8163 | 4.6 | 面议 | 聊城汇兴达 | ||
| 现 7 . | 无缝钢管 | 山东 | 12×1 | 20#8163 | 4.6 | 面议 | 聊城汇兴达 | 
| 标准 | 牌号 | 化学成分(%) | |||||||||
| C | Si | Mn | P | S | Cu | Ni | Mo | Cr | V | ||
| GB/T8162 | 10 | 0.07-0.14 | 0.17-0.37 | 0.35-0.65 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.25 | / | ≤0.15 | / | 
| 20 | 0.17-0.24 | 0.17-0.37 | 0.35-0.65 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.25 | / | ≤0.25 | / | |
| 35 | 0.32-0.40 | 0.17-0.37 | 0.50-0.80 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.25 | / | ≤0.25 | / | |