Nickel alloys
HASTELLOY C-22
Trademarked alloy / UNS identity; procurement requires a product specification and condition.
Identity / state reference
What distinguishes this material
A corrosion-resistant Ni-Cr-Mo alloy. Its chromium balance helps in oxidizing media; this is not a universal ranking above C-276 for every acid, concentration and temperature.
- Designation in this reference
- UNS N06022
- Forms covered by the sources
- Plate / sheet / strip
- Bar / billet
- Other forms listed in the manufacturer source
- States to distinguish or confirm
- Solution heat treated; record subsequent fabrication and weld condition
- Temperature and exposure
- A service-temperature statement is not an allowable stress or a guarantee at temperature. Use the specified product condition and exposure duration.
Other search names in these sources
N06022 · Alloy C-22
Read the scope above: a source’s related product name is not a blanket interchangeability statement.
Property evidence for a stated condition
No condition-specific numerical table is reproduced here
The linked sources establish the identity and the stated product/state scope. Obtain the row for your actual form, section, treatment and test conditions before adopting strength, hardness or a thermal limit.
Resolve these conditions next
- Which product form and governing purchase specification are on the certificate?
- What heat treatment, cold work and test temperature apply to this lot?
For machining, take the exact grade, supplied condition and measured hardness where applicable into the tool maker’s application data. A generic material-family speed is not a substitute for an operation and tool-specific recommendation.
Sources and what they establish
Reviewed 23 October 2026. A source’s publication date and the review date are different. The scope below identifies the fields checked.
Haynes International: HASTELLOY C-22
Specific alloy identity, fabrication and condition guidance; no generic cutting-speed recommendation is imported.
Haynes International: HASTELLOY C-22 ↗Source identity, a named product example and a supplied-batch certificate are different evidence. Cross-standard similarity does not approve substitution.
Corrections from the previous article
- The old blanket C-22-versus-C-276 ranking omits the chemical environment.
- Remove the unsubstantiated legacy machinability percentage and speed ranges.
Other references in Nickel alloys
Related references, not equivalent substitutes.