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Which material is best for pressure vessels?
Quick answer
Ambient and moderate temperature: ASTM A516 Grade 70. Elevated-temperature and hydrogen service: P11 Alloy Steel (1¼% chromium-½% molybdenum) or P22 Alloy Steel (2¼% chromium-1% molybdenum). Corrosive contents: SS 316L Stainless Steel or Duplex 2205 Stainless Steel or SS 904L Stainless Steel. Low temperature: ASTM A516 Grade 60 or SS 304L Stainless Steel.
| Service condition | Recommended materials |
|---|---|
| Ambient and moderate temperature | ASTM A516 Grade 70 |
| Elevated-temperature and hydrogen service | P11 Alloy Steel (1¼% chromium-½% molybdenum), P22 Alloy Steel (2¼% chromium-1% molybdenum) |
| Corrosive contents | SS 316L Stainless Steel, Duplex 2205 Stainless Steel, SS 904L Stainless Steel |
| Low temperature | ASTM A516 Grade 60, SS 304L Stainless Steel |
Products
Buying tips
- Specify impact test temperature (MDMT)
- Request UT of plates where required
- Consider simulated PWHT for thick carbon steel
- Match nozzle pipe and flanges to the shell material
Industries
Frequently asked questions
What is the best material for pressure vessels?
It depends on the service condition. Ambient and moderate temperature: ASTM A516 Grade 70; Elevated-temperature and hydrogen service: P11 / T11 / Grade 11 (1¼Cr-½Mo) or P22 / T22 / Grade 22 (2¼Cr-1Mo); Corrosive contents: SS 316L or Duplex 2205 or SS 904L; Low temperature: ASTM A516 Grade 60 or SS 304L.
Which product forms are used for pressure vessels?
Plates, Flanges, Pipes, Fittings.
How should I specify materials for this application?
Specify impact test temperature (MDMT). Request UT of plates where required. Consider simulated PWHT for thick carbon steel. Match nozzle pipe and flanges to the shell material.