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Which materials are used in pressure vessel fabrication?
Quick answer
ASTM A516 Grade 70 for carbon steel shells and heads; P22 Alloy Steel (2¼% chromium-1% molybdenum) for hydroprocessing reactors (A387 Gr 22); P11 Alloy Steel (1¼% chromium-½% molybdenum) for elevated-temperature vessels; SS 316L Stainless Steel for stainless vessels; Duplex 2205 Stainless Steel for chloride-resistant vessels.
What are the material challenges in pressure vessel fabrication?
Code-compliant material certification
Notch toughness at design minimum temperature
Heavy-plate availability and cutting
PWHT and hydrogen service requirements
Materials we supply for this industry
| Material | Typical use | Grade family |
|---|---|---|
| ASTM A516 Grade 70 | Carbon steel shells and heads | Carbon Steel |
| P22 Alloy Steel (2¼% chromium-1% molybdenum) | Hydroprocessing reactors (A387 Gr 22) | Alloy Steel |
| P11 Alloy Steel (1¼% chromium-½% molybdenum) | Elevated-temperature vessels | Alloy Steel |
| SS 316L Stainless Steel | Stainless vessels | Stainless Steel |
| Duplex 2205 Stainless Steel | Chloride-resistant vessels | Stainless Steel |
| ASTM A333 Grade 6 | Low-temperature nozzles | Carbon Steel |
Popular products for pressure vessel fabrication
Which standards apply?
Related applications
Pressure Vessel Fabrication markets we supply
Procurement considerations
- Specify grade, specification and edition
- Define tests and certificates (EN 10204 3.1 / 3.2)
- Include third-party inspection and PMI where required
- Confirm marking, packing and destination documentation
We support pressure vessel fabrication buyers with documentation and inspection and value-added services.
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Frequently asked questions
Which plate is used for pressure vessels?
For carbon steel, ASTM A516 Grade 70 is the most common. Cr-Mo A387 is used for elevated temperatures, and A240 stainless and duplex for corrosive service.
Which product forms do you supply for pressure vessel fabrication?
Plates, Pipes, Flanges, Fittings, in the grades listed above, from stock or mill-sourced with EN 10204 certificates.
Which standards apply to pressure vessel fabrication materials?
Do you supply pressure vessel fabrication projects outside India?
Yes, including Germany.