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Which material is best for reactors?
Quick answer
Hydroprocessing (hydrogen, high temperature): P22 Alloy Steel (2¼% chromium-1% molybdenum) or P91 Alloy Steel (Modified 9% chromium-1% molybdenum-vanadium). General chemical reactors: SS 316L Stainless Steel or SS 317L Stainless Steel. Aggressive chemistries: Hastelloy C276 or Hastelloy C22. Stainless weld-overlay base: P22 Alloy Steel (2¼% chromium-1% molybdenum).
| Service condition | Recommended materials |
|---|---|
| Hydroprocessing (hydrogen, high temperature) | P22 Alloy Steel (2¼% chromium-1% molybdenum), P91 Alloy Steel (Modified 9% chromium-1% molybdenum-vanadium) |
| General chemical reactors | SS 316L Stainless Steel, SS 317L Stainless Steel |
| Aggressive chemistries | Hastelloy C276, Hastelloy C22 |
| Stainless weld-overlay base | P22 Alloy Steel (2¼% chromium-1% molybdenum) |
Products
Buying tips
- Specify step-cooling and temper-embrittlement tests where needed
- Define clad or overlay requirements
- Request UT of heavy plates
- Document heat treatment
Industries
Frequently asked questions
What is the best material for reactors?
It depends on the service condition. Hydroprocessing (hydrogen, high temperature): P22 / T22 / Grade 22 (2¼Cr-1Mo) or P91 / T91 / Grade 91 (9Cr-1Mo-V); General chemical reactors: SS 316L or SS 317L; Aggressive chemistries: Hastelloy C276 or Hastelloy C22; Stainless weld-overlay base: P22 / T22 / Grade 22 (2¼Cr-1Mo).
Which product forms are used for reactors?
Plates, Flanges, Pipes.
How should I specify materials for this application?
Specify step-cooling and temper-embrittlement tests where needed. Define clad or overlay requirements. Request UT of heavy plates. Document heat treatment.