低温用无缝和焊接钢管
标准：
ASTM A333——Seamless and Welded Steel Pipe for Low-Temperature Service
主要生产钢管牌号：
Grade 1, Grade 3, Grade 4, Grade 6, Grade 7, Grade 8, Grade 9, Grade 10, Grade 11
冲击温度：
|
级别 |
冲击试验温度 |
|
℉ |
℃ |
|
Grade 1 |
-50 |
-45 |
|
Grade 3 |
-150 |
-100 |
|
Grade 4 |
-150 |
-100 |
|
Grade 6 |
-50 |
-45 |
|
Grade 7 |
-100 |
-75 |
|
Grade 8 |
-320 |
-195 |
|
Grade 9 |
-100 |
-75 |
|
Grade 10 |
-75 |
-60 |
力学性能：
|
标准 |
牌号 |
抗拉强度（MPa） |
屈服强度（MPa） |
伸长率（％） |
|
纵 向 |
横 向 |
|
ASTM A333 |
Grade 1 |
≥380 |
≥205 |
≥35 |
≥25 |
|
Grade 3 |
≥450 |
≥240 |
≥30 |
≥20 |
|
Grade 4 |
≥415 |
≥240 |
≥30 |
≥16.5 |
|
Grade 6 |
≥415 |
≥240 |
≥30 |
≥16.5 |
|
Grade 7 |
≥450 |
≥240 |
≥30 |
≥22 |
|
Grade 8 |
≥690 |
≥515 |
≥22 |
|
|
Grade 9 |
≥435 |
≥315 |
≥28 |
|
|
Grade 10 |
≥550 |
≥450 |
≥22 |
|
|
Grade 11 |
≥450 |
≥240 |
≥18 |