We are Riddhi Siddhi Impex, a Mumbai-based Duplex 2205 Foils manufacturer, supplier, and exporter, established in 2002. We slit 22Cr duplex stainless steel foil to ASTM A240 / ASME SA-240 in thicknesses from 0.03 mm to 0.08 mm. Our ISO 9001, 14001, and 45001-certified firm carries ready stock, has a monthly supply capacity of 400-500 tonnes, and provides EN 10204 Type 3.1 / 3.2 mill test certificates when requested.
Duplex 2205 foils are thin, cold-rolled flat products with a two-phase structure of roughly equal austenite and ferrite. The 22% chromium, 3% molybdenum, and nitrogen chemistry gives this duplex UNS S32205 foil a PREN typically above 35, allowing the grade to resist localized chloride pitting and stress corrosion cracking far better than standard 304 or 316 stainless steels. Yield strength is nearly double that of standard austenitic grades, which is why buyers choose DSS 2205 foils where high strength meets an aggressive chloride environment.
We, as a premier duplex 2205 foil supplier, process every Alloy 2205 coil in-house on our own slitting lines, utilizing raw material sourced from reputed primary mills. This ensures your Duplex steel foil leaves our facility in a soft annealed condition to ASTM A240, between 3 mm and 2000 mm. Buyers can specify BA or 2B surfaces along with slit, deburred, mill or round edges.
We provide ASTM A240 Duplex 2205 foil in annealed condition, cold rolled and precision slit, in two surface finishes and four edge options, supplied in coil.
| Parameter | Details |
|---|---|
| Standard | ASTM A240 / ASME SA-240 |
| Thickness | 0.03 mm to 0.08 mm |
| Width | 3 mm to 2000 mm |
| Width Tolerance | ±0.1 mm |
| Condition | Annealed (Soft) |
| Surface Finish | BA (Bright Annealed), 2B |
| Edge | Slit edge, Mill edge, Deburred edge, Round edge |
Nitrogen sets S32205 apart. Its 0.14 to 0.20% addition stabilises the austenite phase and lifts pitting resistance, which is why the tighter S32205 window is preferred over the older S31803. The full ASTM A240 balance for UNS S32205 foils appears below.
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.030 max |
| Manganese (Mn) | 2.00 max |
| Phosphorus (P) | 0.030 max |
| Sulphur (S) | 0.020 max |
| Silicon (Si) | 1.00 max |
| Chromium (Cr) | 22.0 to 23.0 |
| Nickel (Ni) | 4.5 to 6.5 |
| Molybdenum (Mo) | 3.0 to 3.5 |
| Nitrogen (N) | 0.14 to 0.20 |
Strength is the defining mechanical characteristic. Duplex SS 2205 foils to ASTM A240 carry a 655 MPa minimum tensile strength, above the older S31803 figure, alongside a 450 MPa minimum yield.
| Property | Value |
|---|---|
|
Tensile Strength, minimum
|
655 MPa (95 ksi) |
|
Yield Strength (0.2% offset), minimum
|
450 MPa (65 ksi) |
|
Elongation in 50 mm, minimum
|
25% |
|
Hardness, maximum
|
293 HBW / 31 HRC |
International buyers can cross-reference UNS S32205 foils against their regional standard below. The 1.4462 foils we stock match every designation shown.
| Country / Standard | Designation |
|---|---|
| USA (UNS) | S32205 |
| Europe (EN) | X2CrNiMoN22-5-3 |
| Germany (W.Nr) | 1.4462 |
| Japan (JIS) | SUS329J3L |
| China (GB) | S22253 (022Cr23Ni5Mo3N) |
These 4 industries specify most of the 2205 duplex foils we slit. In each case, the buyer selects the grade for chloride pitting resistance, stress corrosion cracking resistance, or high strength in a thin gauge.
Chemical plants use 22Cr duplex foil for gaskets, diaphragms, and vessel linings in warm chloride media. The grade shrugs off the stress corrosion cracking that splits austenitic 316 within months, and its high yield strength allows the use of thinner sections in aggressive process streams.
Topside and subsea equipment utilised in saline, sometimes sour, service. Duplex 2205 foils resist pitting and crevice attack in seawater while providing the mechanical strength required for offshore service. Slit to ±0.1 mm, the foil suits shim stock, sealing components, and instrumentation parts in chloride-rich conditions.
Seawater resistance defines this application. Desalination plants fit 2205 duplex foil into heat recovery components and pumps exposed to hot, high-chloride brine, where the nitrogen chemistry improves resistance to pitting. The high strength allows thinner parts than austenitic stainless would permit in the same duty.
Heat exchanger builders value the mix of thermal performance and corrosion resistance. Thin-gauge Duplex 2205 foil is used in spiral-wound gaskets, spacers, and plate components that handle chloride-laden cooling water without pitting. Custom-slit widths let fabricators form seals and shims that fit precisely.
Export orders leave Mumbai and Taloja, packed in wooden cases or on pallets for sea freight.
| Parameter | Details |
|---|---|
| Packaging | Wooden cases, pallet packing |
| Incoterms | FOB, CIF, CFR, EXW Mumbai |
| Dispatch Points | Mumbai and Taloja warehouses |
| Standard Lead Time | 4 to 5 days |
| Urgent Dispatch | 2 to 3 days |
| Payment Terms | Advance, credit, LC |
| Certification | EN 10204 Type 3.1 / 3.2 on request |
Duplex 2205 foils in India are typically ₹280-₹450 per kg, and in international markets they are roughly $8.5-$14 per kg. The figure tracks global nickel and molybdenum rates, and thickness, width, finish, and quantity all move it. Volume discounts apply to bulk orders, so call or WhatsApp us for today's rate.
We slit Duplex 2205 foils from 0.03 mm to 0.08 mm thick and to any width between 3 mm and 2000 mm, held to ±0.1 mm on width. Thickness is held to the mill's foil-gauge tolerance.
Duplex 2205 foils are covered by ASTM A240 / ASME SA-240 for flat-rolled product, under grade UNS S32205. We supply to whichever standard your order needs, with AMS specifications available on request.
The main difference is the tighter chemistry. UNS S32205 raises the minimum chromium, molybdenum, and nitrogen, which lifts minimum tensile strength to 655 MPa against 620 MPa for S31803. S32205 is the preferred procurement designation.
Some of the finishes we offer on Alloy 2205 foils are BA (Bright Annealed) and 2B. Deburred and round edges suit gasket and shim work where a sharp slit edge would mark adjacent parts.
You can source Duplex 2205 foils in India from us at Riddhi Siddhi Impex. Our Mumbai warehouse holds S32205 foil on the shelf for immediate dispatch. As a manufacturer, stockist, and exporter, we serve buyers across India and overseas. Phone or WhatsApp us for a quote within 24 hours.
