ASTM A815 WPS31803 — Chemical Composition & Mechanical Properties
ASTM A815 WPS31803 is a duplex stainless steel grade for wrought butt-weld fittings (UNS S31803, EN / W.Nr 1.4462). It is also known as 2205 / UNS S31803. This sheet summarises its chemical composition limits, minimum mechanical properties, heat treatment and typical service. Teshi Group manufactures flanges and fittings in this grade.
ASTM A815 WPS31803 at a glance
| Specification | ASTM A815 WPS31803 |
|---|---|
| Material family | Duplex stainless steel |
| Product form | Wrought butt-weld fittings |
| UNS number | S31803 |
| EN / W.Nr equivalent | 1.4462 |
| Also known as | 2205 / UNS S31803 |
| PREN (min values) | 30.5 |
| Document | TG-MG-071 · Rev. 1 · October 2026 |
Typical service
Duplex butt-weld fittings for offshore and process piping
Heat treatment
Solution annealed 1020–1100 °C, water quench
Chemical composition of ASTM A815 WPS31803 (weight %)
Single values are maximums unless shown as a range or “min”.
Mechanical properties
| Tensile strength, min | 620 MPa |
|---|---|
| Yield strength (0.2 % offset), min | 450 MPa |
| Elongation, min | 20 % |
| 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 A815 WPS31803
All equivalents| Standard system | Nearest equivalent grade |
|---|---|
| USA — ASTM / ASME | ASTM A815 WPS31803 · ASME SA-815 WPS31803 |
| USA — UNS | S31803 |
| 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| UK — BS (withdrawn) | 318S13 |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 F51 |
| Seamless & welded pipe | ASTM A790 UNS S31803 |
Other duplex stainless steel grades
Duplex stainless steel overviewStandards for ASTM A815 WPS31803
All material standardsFAQ
ASTM A815 WPS31803: common questions
What is the minimum yield strength of ASTM A815 WPS31803?
450 MPa, with a minimum tensile strength of 620 MPa.
What is the carbon content of ASTM A815 WPS31803?
0.030 max %.
What is the PREN of ASTM A815 WPS31803?
About 31, 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 A815 WPS31803?
UNS S31803; the nearest European designation is W.Nr 1.4462. Equivalents are close but not identical — check the specification if substituting.
How is ASTM A815 WPS31803 heat treated?
Solution annealed 1020–1100 °C, water quench.
What is the Chinese (GB) equivalent of ASTM A815 WPS31803?
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 A815 WPS31803?
The nearest Japanese (JIS) equivalent is SUS329J3L.
Does Teshi Group supply ASTM A815 WPS31803?
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.
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