Duplex 2205 — Sheet, Plate, Coil, Pipe & Tube & Fittings
Also sold as UNS S32205 / S31803 · W.Nr 1.4462 · F51 / F60 · SAF 2205
Duplex 2205 is a duplex (austenitic-ferritic) stainless steel, chosen for strength with chloride resistance at a stainless-steel budget. We supply it as sheet, plate, coil, pipe & tube, fittings, flanges, fasteners, with EN 10204 3.1 certificates, from Mumbai to India, the Gulf, South-East Asia, South America, Europe, the UK and the USA.
- UNS S32205
- W.Nr 1.4462
- PREN ≈ 35
- ρ 7.8 g/cm³
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
Duplex 2205 Products
Duplex 2205 Names, Designations & Composition
Duplex 2205 is one alloy sold under several names. Its UNS number is S32205, the European material number is W.Nr 1.4462 and the EN name is X2CrNiMoN22-5-3. The chart on the right shows the specified range of each main alloying element; the balance is the base metal.
Duplex 2205 Specifications by Product — Which Standard Applies?
The material standard changes with the product form. This is the table buyers ask for most.
| Product | Material standard | Dimensions |
|---|---|---|
| Duplex 2205 sheet | ASTM A240 | ASTM A480 / B906 |
| Duplex 2205 plate | ASTM A240 | ASTM A480 / B906 / A20 |
| Duplex 2205 coil | ASTM A240 | ASTM A480 |
| Duplex 2205 pipe & tube | ASTM A790 · ASTM A790 · A928 | ASME B36.19 / B36.10 |
| Duplex 2205 fittings | ASTM A815 WPS31803 / WPS32205 · ASTM A182 F51 / F60 | ASME B16.9 · B16.11 |
| Duplex 2205 flanges | ASTM A182 F51 / F60 | ASME B16.5 · B16.47 |
| Duplex 2205 fasteners | ASTM A1082 (S32205) where specified for applicable duplex bolts, studs, cap screws and nuts; for other types, material may be supplied to ASTM A276 / A479 bar where applicable, subject to the purchase specification | ASME B18.2.1 · B18.2.2 |
Duplex 2205 Chemical Composition
Under technical review for TDS.
| Element | Current requirement |
|---|---|
| Chromium | As specified |
| Nickel | As specified |
| Molybdenum | As specified |
| Nitrogen | As specified |
| Carbon | As specified |
| Manganese | As specified |
| Silicon | As specified |
| Phosphorus | As specified |
| Sulphur | As specified |
| Iron | As specified |
Numerical specification requirements are published only after the applicable current standard edition has been verified. Governing specification to be verified: ASTM A240 for UNS S32205.
Duplex 2205 Mechanical Properties
Under technical review for TDS.
| Property | Current requirement |
|---|---|
| Tensile strength | As specified |
| Yield strength 0.2% | As specified |
| Elongation | As specified |
| Hardness | As specified |
Numerical specification requirements are published only after the applicable current standard edition has been verified. Governing specification and condition to be verified: ASTM A240 for UNS S32205 — Solution-annealed plate & sheet.
Density & Physical Properties
| Property | Value |
|---|---|
| Density | 7.8 g/cm³ |
| Melting range | 1385 – 1445 °C |
| Magnetic | Magnetic (ferritic phase) |
| PREN (approx.) | ≈ 35 |
Duplex 2205 Equivalent Grades
Duplex 2205 Corrosion Resistance — What Each Element Does
A roughly 50/50 austenite-ferrite structure gives about twice the yield strength of 316L, so walls can be thinner.
Chromium, molybdenum and nitrogen give a PREN around 35 — well above 316L.
The ferrite phase gives far better resistance to chloride stress-corrosion cracking than austenitic grades.
Keep service below about 300 °C to avoid embrittlement.
Duplex 2205 vs 316L, 904L and 2507
| Grade | PREN (approx.) | Pick it for |
|---|---|---|
| SS 316 / 316L | ≈ 24 | Chloride-bearing process fluids, marine air and pharmaceutical service |
| SS 904L | ≈ 35 | Dilute sulphuric acid, phosphoric acid and chloride-bearing cooling water |
| Duplex 2205 | ≈ 35 | Strength with chloride resistance at a stainless-steel budget |
| Super Duplex 2507 | ≈ 42 | Seawater and high-chloride service where strength also matters |
Welding Duplex 2205
| Matching filler | ER2209 (AWS A5.9) |
|---|---|
| Also used | Control heat input 0.5–2.5 kJ/mm to keep the phase balance |
Duplex 2205 for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiDuplex 2205 — questions buyers ask
What is Duplex 2205?
Duplex 2205 is a duplex (austenitic-ferritic) stainless steel. It is chosen for strength with chloride resistance at a stainless-steel budget.
Which standards cover Duplex 2205 products?
Sheet: ASTM A240; Plate: ASTM A240; Coil: ASTM A240; Pipe & Tube: ASTM A790 · ASTM A790 · A928; Fittings: ASTM A815 WPS31803 / WPS32205 · ASTM A182 F51 / F60; Flanges: ASTM A182 F51 / F60; Fasteners: ASTM A1082 (S32205) where specified for applicable duplex bolts, studs, cap screws and nuts; for other types, material may be supplied to ASTM A276 / A479 bar where applicable, subject to the purchase specification. Always name the standard and edition on your order.
What is the UNS number of Duplex 2205?
UNS S32205 · S31803, with the European material number W.Nr 1.4462.
What is the density of Duplex 2205?
7.8 g/cm³ — use it to calculate weights: plate kg = L(m) × W(m) × t(mm) × 7.8.
Duplex 2205 or Super Duplex 2507?
Duplex 2205 suits strength with chloride resistance at a stainless-steel budget; Super Duplex 2507 is the step up for seawater and high-chloride service where strength also matters.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026