Alloy C-22 (UNS N06022) — Chemical Composition & Mechanical Properties
Alloy C-22 (UNS N06022) is a nickel alloys grade for nickel alloy forgings, fittings & pipe (UNS N06022, EN / W.Nr 2.4602). It is also known as Hastelloy C-22 (trade name). This sheet summarises its chemical composition limits, minimum mechanical properties, heat treatment and typical service. Teshi Group manufactures flanges and fittings in this grade.
Alloy C-22 (UNS N06022) at a glance
| Specification | Alloy C-22 (UNS N06022) |
|---|---|
| Material family | Nickel alloys |
| Product form | Nickel alloy forgings, fittings & pipe |
| UNS number | N06022 |
| EN / W.Nr equivalent | 2.4602 |
| Also known as | Hastelloy C-22 (trade name) |
| PREN (min values) | 65.4 |
| Document | TG-MG-090 · Rev. 1 · October 2026 |
Typical service
Oxidising and reducing acids, pharmaceutical and FGD service
Heat treatment
Solution annealed 1120 °C min, rapid cool
Chemical composition of Alloy C-22 (UNS N06022) (weight %)
Single values are maximums unless shown as a range or “min”.
Mechanical properties
| Tensile strength, min | 690 MPa |
|---|---|
| Yield strength (0.2 % offset), min | 310 MPa |
| Elongation, min | 45 % |
| Hardness | Not specified |
About nickel alloys
Nickel alloys are used where stainless steels run out of corrosion or temperature resistance. With 30–99 % nickel and additions of chromium, molybdenum, copper or tungsten, they resist strong acids, chlorides, caustics and oxidation from cryogenic temperatures to above 1000 °C.
Reference information compiled from the published standard for convenience. It does not replace the current edition of the governing standard, which takes precedence. Verify critical dimensions and properties before design, purchase or fabrication. Teshi Engineers & Sales Promoters (P) Ltd accepts no liability for errors or omissions.
International equivalents of Alloy C-22 (UNS N06022)
All equivalents| Standard system | Nearest equivalent grade |
|---|---|
| USA — specification | Alloy C-22 (UNS N06022) |
| USA — UNS | N06022 |
| Europe — EN designation | NiCr21Mo14W |
| Europe — W.Nr | 2.4602 |
| Japan — JIS | NW6022 |
| China — GB / NB | NS3308 (GB/T 15007) |
Equivalents are the nearest commonly cited grades. Chemistry, mechanical properties and testing differ between standards — compare them before substituting one for another.
Same alloy in other product forms
| Product form | Specification / grade |
|---|---|
| Flanges & forged fittings | ASTM B564 N06022 |
| Butt-weld fittings | ASTM B366 WPHC22 |
| Seamless pipe | ASTM B622 N06022 |
| Welded pipe | ASTM B619 N06022 |
| Plate | ASTM B575 N06022 |
| Bar | ASTM B574 N06022 |
Standards for Alloy C-22 (UNS N06022)
All material standardsFAQ
Alloy C-22 (UNS N06022): common questions
What is the minimum yield strength of Alloy C-22 (UNS N06022)?
310 MPa, with a minimum tensile strength of 690 MPa.
What is the carbon content of Alloy C-22 (UNS N06022)?
0.015 max %.
What is the PREN of Alloy C-22 (UNS N06022)?
About 65, calculated as Cr + 3.3Mo + 16N (+ 1.65W) using the specification minimum values. Typical heats are a little higher.
What is the UNS number and EN equivalent of Alloy C-22 (UNS N06022)?
UNS N06022; the nearest European designation is W.Nr 2.4602. Equivalents are close but not identical — check the specification if substituting.
How is Alloy C-22 (UNS N06022) heat treated?
Solution annealed 1120 °C min, rapid cool.
What is the Chinese (GB) equivalent of Alloy C-22 (UNS N06022)?
The nearest Chinese equivalent is NS3308 (GB/T 15007). Equivalents are close but not identical — compare chemistry and properties before substituting.
What is the JIS equivalent of Alloy C-22 (UNS N06022)?
The nearest Japanese (JIS) equivalent is NW6022.
Does Teshi Group supply Alloy C-22 (UNS N06022)?
Teshi Group manufactures flanges and fittings in this grade. Send your size, rating and quantity to info@teshigroup.com for a quotation with EN 10204 3.1 certificates.
Related products, data sheets and standards
Weld Neck Flange
OEM manufacturer
View online · PDFTechnical data sheetSlip-On Flange
OEM manufacturer
View online · PDFTechnical data sheetBlind Flange
OEM manufacturer
View online · PDFTechnical data sheetSocket Weld Flange
OEM manufacturer
View online · PDFTechnical data sheetThreaded Flange
OEM manufacturer
View online · PDFTechnical data sheetLap Joint Flange
OEM manufacturer
View online · PDFMaterial productsInconel 600, 625 & 825 Flanges & Fittings
Grades, sizes and standards we supply
ViewMaterial productsInconel 625 Flanges
Grades, sizes and standards we supply
ViewMaterial productsInconel 600 / Incoloy 825 Flanges
Grades, sizes and standards we supply
View
Ready to build to spec?
Share your drawing, bill of materials or technical requirements with the Teshi team.