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Duplex Steel Sheet & Plate Supplier in Mumbai, India
Nicorex Alloys is a Mumbai-based ISO 9001 and ISO 14001 certified importer, stockist, and supplier of Duplex Steel sheets and plates. We stock Duplex 2205 (UNS S31803/S32205) and 2304 in thicknesses from 0.5 mm to 100 mm, widths up to 2500 mm, with surface finishes such as No.1, 2B, BA, and No.4.
Duplex stainless steel has a two-phase structure of roughly equal parts austenite and ferrite, giving about twice the yield strength of 304 and 316. Stocked forms include hot rolled plates, cold rolled sheets, coils, and strips under ASTM A240 / ASME SA-240. All shipments carry EN 10204/3.1B mill certificates.
Duplex Steel Sheet & Plate Specifications
| Standards | ASTM A240 / ASME SA-240 |
|---|---|
| Grade | Duplex 2205 (UNS S31803 / S32205, Werkstoff 1.4462) |
| Thickness Range | 0.5 mm to 100 mm (grade and form dependent) |
| Width Range | 1000 mm to 2500 mm |
| Length Range | 1000 mm to 6000 mm (custom lengths available) |
| Surface Finishes | No.1, 2B, 2D, BA, No.4, No.8 (mirror), hairline |
| Supply Condition | Solution annealed and quenched |
| Forms Available | Hot Rolled Plate, Cold Rolled Sheet, Strip, Coil, Shim, Perforated, Chequered, Clad |
What Are Duplex Steel Sheets and Plates?
Duplex steel sheets and plates are flat products from stainless steels with a dual (austenite + ferrite) structure. Sheets are under 6 mm thick for lighter-gauge work. Plates are 6 mm and above for pressure vessels and heat exchangers.
Key alloying elements include chromium (21 to 23%), molybdenum (2.5 to 3.5%) for pitting protection, and nitrogen (0.14 to 0.20%) for strength. PREN for Duplex 2205 is 34 to 36. Duplex 2205 has double the yield strength of 316L and chloride SCC resistance up to 150°C versus 60°C.
Types and Forms of Duplex Steel Sheets and Plates
Duplex Hot Rolled Plates
Duplex Cold Rolled Sheets
Duplex Polished Sheets
Duplex Chequered Plates
Duplex Coils and Strips
Duplex Shim Sheets
Duplex Perforated Sheets
Duplex Clad Plates
Get Duplex Steel Sheets and Plates at Competitive Prices
Available Grades of Duplex Steel Sheets and Plates
Duplex 2205 Sheet & Plate
Duplex 2205 is the most widely used duplex grade, covering over 80% of global usage. It contains 22% Cr, 5% Ni, 3% Mo, and 0.17% N. PREN is 34 to 36. Yield strength is about 450 MPa. It resists chloride pitting and SCC up to 150°C. This grade is NACE MR0175 listed and NORSOK approved. Most material ships dual-certified S31803/S32205.
Duplex 2304 Sheet & Plate
2304 is a lean duplex grade with 23% Cr, 4% Ni, and low Mo. It is more cost-effective than 2205 with corrosion resistance close to 316L. This grade is used in storage tanks and construction.
Industries and Applications of Duplex Steel Sheets and Plates
- Oil and Gas: Process piping, heat exchangers, pressure vessels, and subsea flowlines.
- Chemical Processing: Reactors, storage tanks, and heat exchangers.
- Marine and Offshore: Platform structures, seawater piping, and desalination units.
- Desalination: Reverse osmosis piping and brine handling.
- Pulp and Paper: Digesters and bleaching equipment.
- Construction: Bridges, rebar, and cladding.
- Food and Beverage: Tanks and process equipment.
