We are Riddhi Siddhi Impex, a supplier and stockist of Duplex 2205 Coils, and we have operated from Mumbai since 2002. Our coils conform to ASTM A240 / ASME SA-240. We keep thicknesses from 0.03 mm to 5 mm in ready stock. Our facility runs under ISO 9001, 14001, and 45001, we ship 400 to 500 tonnes a month worldwide, and every despatch we send out carries an EN 10204 Type 3.1 / 3.2 mill certificate.
Duplex Steel 2205 coils are flat-rolled stainless steel with a two-phase structure of roughly equal austenite and ferrite. The 22% chromium, 3% molybdenum, and nitrogen chemistry gives a PREN of approximately 35, so the grade resists chloride pitting and stress corrosion cracking far better than 304 or 316. Yield strength runs more than double that of standard austenitic grades, which is why it is commonly selected for applications where high strength meets an aggressive chloride environment.
We stock duplex steel coils in the solution annealed condition to ASTM A240, sourced directly from reputed primary mills. Any width from 3 mm to 2000 mm can be slit to your requirement, in No.1, 2B, or BA finish. A documented quality system governs every stage.
We provide ASTM A240 Duplex 2205 steel coils in the solution annealed condition, hot rolled or cold rolled, in three finishes and four edge options, slit to your requirement.
| Parameter | Details |
|---|---|
| Standard | ASTM A240 / ASME SA-240 |
| General Requirements | ASTM A480 |
| Thickness | 0.03 mm to 5 mm |
| Width | 3 mm to 2000 mm |
| Width Tolerance | ±0.1 mm on narrow slit widths |
| Coil ID | 150 mm to 610 mm |
| Coil OD | Up to 1800 mm |
| Condition | Solution annealed per ASTM A240 |
| Surface Finish | No.1 (hot rolled, annealed, pickled), 2B, BA |
| Edge | Slit, Mill, Deburred, Round |
| Supply Form | Hot Rolled (HR), Cold Rolled (CR) |
Nitrogen is a key alloying element in UNS S32205. Its 0.14 to 0.20% addition stabilises the austenite phase and lifts pitting resistance, which is why this tighter chemistry window is preferred. The full ASTM A240 composition 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 |
| Iron (Fe) | Balance |
High mechanical strength is one of the defining characteristics of 2205 stainless steel coils. DSS 2205 coils to ASTM A240 carry a 655 MPa minimum tensile strength, above the older S31803 figure, alongside a 450 MPa minimum yield. Coils leave in the solution annealed condition only; cold-worked tempers are not a standard supply condition for this grade under ASTM A240.
| Property | Value |
|---|---|
|
Tensile Strength, minimum
|
655 MPa (95 ksi) |
|
Yield Strength (0.2% offset), minimum
|
450 MPa (65 ksi) |
|
Elongation in 50.8 mm (2 in.), minimum
|
25% |
|
Hardness, maximum
|
293 HBW / 31 HRC |
International buyers can cross-reference UNS S32205 coils against their regional standard below. The 1.4462 coils we stock correspond to the designations shown for cross-reference.
| Country / Standard | Designation |
|---|---|
| USA (UNS) | S32205 |
| Europe (EN) | 1.4462 (X2CrNiMoN22-5-3) |
| Japan (JIS) | SUS329J3L |
| China (GB) | 022Cr23Ni5Mo3N (S22053) |
| France (AFNOR) | Z3CND22-05AZ (legacy) |
These are the applications that rely on the Alloy 2205 coils we supply. In each case, the buyer selects the grade for chloride pitting resistance, stress corrosion cracking resistance, or high strength.
Chemical plants specify 22Cr duplex coils for reactor bodies, tanks, and pressure vessels in warm chloride media. The grade resists the stress corrosion cracking that can affect austenitic Grade 316 in chloride-containing environments.
Topside and subsea equipment runs in saline, sometimes sour, service within NACE MR0175 / ISO 15156 limits. Duplex 2205 coils resist chloride pitting far better than austenitic grades while carrying the mechanical load offshore structures demand. Separator internals, flowlines, and manifolds rely on the grade.
Seawater resistance defines this application. Desalination plants fit 2205 duplex coil into flash chambers, heat recovery sections, and pumps exposed to hot, high-chloride brine, where the nitrogen chemistry keeps pitting in check.
Bleach plants run hot, acidic, chloride-heavy liquors that are highly corrosive to conventional stainless steels. Digesters, bleach washers, and storage vessels take Duplex 2205 coils for the pitting and crevice corrosion resistance these lines need.
Heat exchanger builders value the mix of thermal performance and corrosion resistance. Plate and shell components in 2205 duplex handle chloride-laden cooling water without pitting, and the higher strength allows thinner walls.
Export orders leave Mumbai and Taloja, packed in wooden cases or on pallets.
| 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 |
Duplex 2205 coils price in India is around ₹180 to ₹350 per kg, or roughly $2 to $4 per kg for international buyers. The figure tracks global nickel and molybdenum rates, and thickness, width, finish, and quantity all affect the final price. Volume discounts apply to bulk orders, so call or WhatsApp us for the current rate.
We supply Duplex 2205 coils from 0.03 mm to 5 mm thick and to any width between 3 mm and 2000 mm, with a slitting tolerance of ±0.1 mm on narrow widths.
The main difference between UNS S32205 and UNS S31803 is S32205's tighter chemistry window. S32205 raises the minimum chromium, molybdenum, and nitrogen, which lifts minimum tensile strength to 655 MPa against 620 MPa for S31803. It is the preferred procurement designation, and S32205 material also meets S31803 requirements, so mill coils are commonly dual certified.
The finishes available on Duplex 2205 coils are No.1 (hot rolled, annealed, pickled), 2B, and BA (Bright Annealed). Mill, slit, deburred, and round edges suit different downstream operations.
Yes, Duplex 2205 coils can be slit to custom widths. We slit anything from 3 mm to 2000 mm to a ±0.1 mm tolerance on narrow widths, so the coil arrives ready for your process without secondary trimming.
You can source Duplex 2205 coils in India from us at Riddhi Siddhi Impex. Our Mumbai warehouse holds S32205 coil in stock for immediate dispatch. As a stockist, dealer, and distributor, we serve buyers across India and export overseas. We provide quotations within 24 hours.
Yes, we export Duplex 2205 coils internationally. As an established exporter, we ship from Mumbai on FOB, CIF, and CFR terms to destinations worldwide, or EXW Mumbai. Send us your width, thickness, finish, and quantity for a price.
