ASTM A790 UNS S32205 — Chemical Composition & Mechanical Properties
ASTM A790 UNS S32205 is a duplex stainless steel grade for seamless & welded pipe (UNS S32205, EN / W.Nr 1.4462). This sheet summarises its chemical composition limits, minimum mechanical properties, heat treatment and typical service. Teshi Group supplies this grade as a stockist and supplier, and manufactures matching flanges and fittings.
ASTM A790 UNS S32205 at a glance
| Specification | ASTM A790 UNS S32205 |
|---|---|
| Material family | Duplex stainless steel |
| Product form | Seamless & welded pipe |
| UNS number | S32205 |
| EN / W.Nr equivalent | 1.4462 |
| Also known as | 2205 |
| PREN (min values) | 34.1 |
| Document | TG-MG-074 · Rev. 1 · October 2026 |
Typical service
Duplex 2205 process and offshore piping
Heat treatment
Solution annealed 1020–1100 °C, rapid cool
Chemical composition of ASTM A790 UNS S32205 (weight %)
Single values are maximums unless shown as a range or “min”.
Mechanical properties
| Tensile strength, min | 655 MPa |
|---|---|
| Yield strength (0.2 % offset), min | 485 MPa |
| Elongation, min | 25 % |
| Hardness | 290 HBW max |
About duplex stainless steel
Duplex stainless steels have a mixed microstructure of roughly half austenite and half ferrite. The result is about twice the yield strength of 316L, much better resistance to chloride stress-corrosion cracking, and pitting resistance (PREN 34–36) between 316L and the 6Mo grades.
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 ASTM A790 UNS S32205
All equivalents| Standard system | Nearest equivalent grade |
|---|---|
| USA — ASTM / ASME | ASTM A790 UNS S32205 · ASME SA-790 UNS S32205 |
| USA — UNS | S32205 |
| Europe — EN designation | X2CrNiMoN22-5-3 |
| Europe — W.Nr | 1.4462 |
| Japan — JIS | SUS329J3L |
| China — GB / NB | S22253 / S22053 (022Cr22Ni5Mo3N / 022Cr23Ni5Mo3N) |
| China — old GB designation | 00Cr22Ni5Mo3N |
| UK — BS (withdrawn) | 318S13 |
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 |
|---|---|
| Forged flanges & fittings | ASTM A182 F60 (Duplex 2205) |
| Wrought butt-weld fittings | ASTM A815 WPS32205 |
Other duplex stainless steel grades
Duplex stainless steel overviewStandards for ASTM A790 UNS S32205
All material standardsFAQ
ASTM A790 UNS S32205: common questions
What is the minimum yield strength of ASTM A790 UNS S32205?
485 MPa, with a minimum tensile strength of 655 MPa.
What is the carbon content of ASTM A790 UNS S32205?
0.030 max %.
What is the PREN of ASTM A790 UNS S32205?
About 34, calculated as Cr + 3.3Mo + 16N using the specification minimum values. Typical heats are a little higher.
What is the UNS number and EN equivalent of ASTM A790 UNS S32205?
UNS S32205; the nearest European designation is W.Nr 1.4462. Equivalents are close but not identical — check the specification if substituting.
How is ASTM A790 UNS S32205 heat treated?
Solution annealed 1020–1100 °C, rapid cool.
What is the Chinese (GB) equivalent of ASTM A790 UNS S32205?
The nearest Chinese equivalent is S22253 / S22053 (022Cr22Ni5Mo3N / 022Cr23Ni5Mo3N), formerly 00Cr22Ni5Mo3N. Equivalents are close but not identical — compare chemistry and properties before substituting.
What is the JIS equivalent of ASTM A790 UNS S32205?
The nearest Japanese (JIS) equivalent is SUS329J3L.
Does Teshi Group supply ASTM A790 UNS S32205?
Teshi Group supplies this grade as a stockist and supplier, and manufactures matching flanges and fittings. Send your size, rating and quantity to info@teshigroup.com for a quotation with EN 10204 3.1 certificates.
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