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執行標準： ASTM A333（2004）---低溫用無(wú)縫鋼管（美標）
GB18984（2003）---低溫管道用無(wú)縫鋼管（國標）
產(chǎn)品應用：適用于-45℃～-195℃級低溫壓力容器管道以及低溫熱交換器管道用無(wú)縫鋼管
低溫鋼管化學(xué)成分
| 標準 | 牌號 | 化學(xué)成分（%） | ||||||||||
| C | Si | Mn | P | S | Cr | Ni | Cu | Mo | V | Al | ||
| GB/T18984 | 16MnDG | 0.12～0.20 | 0.20～0.55 | 1.20～1.60 | ≤0.025 | ≤0.025 | ||||||
| 10MnDG | ≤0.13 | 0.17～0.37 | ≤1.35 | ≤0.025 | ≤0.025 | ≤0.07 | ||||||
| 09DG | ≤0.12 | 0.17～0.37 | ≤0.95 | ≤0.025 | ≤0.025 | ≤0.07 | ||||||
| 09Mn2VDG | ≤0.12 | 0.17～0.37 | ≤1.85 | ≤0.025 | ≤0.025 | ≤0.12 | ||||||
| 06Ni3MoDG | ≤0.08 | 0.17～0.37 | ≤0.85 | ≤0.025 | ≤0.025 | 2.5～3.7 | 0.15～0.30 | ≤0.05 | ||||
| ASTM A333 | Grade1 | ≤0.30 | -- | 0.40～1.06 | ≤0.025 | ≤0.025 | ||||||
| Grade3 | ≤0.19 | 0.18～0.37 | 0.31～0.64 | ≤0.025 | ≤0.025 | 3.18～3.82 | ||||||
| Grade4 | ≤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 | |||
| Grade6 | ≤0.30 | ≥0.10 | 0.29～1.06 | ≤0.025 | ≤0.025 | |||||||
| Grade7 | ≤0.19 | 0.13～0.32 | ≤0.90 | ≤0.025 | ≤0.025 | 2.03～2.57 | ||||||
| Grade8 | ≤0.13 | 0.13～0.32 | ≤0.90 | ≤0.025 | ≤0.025 | 8.40～9.60 | ||||||
| Grade9 | ≤0.20 | -- | 0.40～1.06 | ≤0.025 | ≤0.025 | 1.60～2.24 | 0.75～1.25 | |||||
| Grade10 | ≤0.20 | 0.10～0.35 | 1.15～1.50 | ≤0.035 | ≤0.015 | ≤0.15 | ≤0.25 | ≤0.015 | ≤0.50 | ≤0.12 | ≤0.06 | |
| Grade11 | ≤0.10 | ≤0.35 | ≤0.60 | ≤0.025 | ≤0.025 | ≤0.50 | 35.0～37.0 | ≤0.50 | ||||
低溫鋼管力學(xué)性能
| 標準 | 牌號 | 最低沖擊試驗溫度 | 抗拉強度Mpa | 屈服強度 | 伸長(cháng)率% | ||
| F | ℃ | 縱向 | 橫向 | ||||
| ASTM A333 | Grade1 | -50 | -45 | ≥380 | ≥205 | ≥35 | ≥25 |
| Grade3 | -150 | -100 | ≥450 | ≥240 | ≥30 | ≥20 | |
| Grade4 | -150 | -100 | ≥415 | ≥240 | ≥30 | ≥16.5 | |
| Grade6 | -50 | -45 | ≥415 | ≥240 | ≥30 | ≥16.5 | |
| Grade7 | -100 | -75 | ≥450 | ≥240 | ≥30 | ≥22 | |
| Grade8 | -320 | -195 | ≥690 | ≥515 | ≥22 | ||
| Grade9 | -100 | -75 | ≥435 | ≥315 | ≥28 | ||
| Grade10 | -75 | -60 | ≥550 | ≥450 | ≥22 | ||
| Grade11 | ≥450 | ≥240 | ≥18 | ||||
| GB/T18984 | 16MnDG | -45 | 490～665 | ≥315 | ≥30 | ||
| 10MnDG | -45 | ≥400 | ≥240 | ≥35 | |||
| 09DG | -45 | ≥385 | ≥210 | ≥35 | |||
| 09Mn2VDG | -70 | ≥450 | ≥300 | ≥30 | |||
| 06Ni3MoDG | -100 | ≥455 | ≥250 | ≥30 | |||
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