低溫用無縫鋼管
標準
ASTM A333——Seamless and Welded Steel Pipe for Low-Temperature Service
主要生產鋼管牌號
沖擊溫度
|
級別
|
最低沖擊試驗溫度
| |
|
℉
|
℃
| |
|
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
|
力學性能
|
標準
|
牌號
|
抗拉強度（MPa）
|
屈服強度（MPa）
|
伸長率（%）
| |
|
縱向
|
橫向
| ||||
|
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
|
||