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Super Duplex Steel Sheet & Plate Supplier in Mumbai, India
Nicorex Alloys is a Mumbai-based ISO 9001 and ISO 14001 certified stockist and supplier of Super Duplex steel sheets and plates. We stock Super Duplex 2507 (UNS S32750) and S32760 in thicknesses from 0.5 mm to 100 mm under ASTM A240/ ASME SA-240.
Super Duplex stainless steel has a PREN above 40 with 24-26% chromium and 3-4% molybdenum, giving it strong pitting resistance in seawater and chloride service. All shipments carry EN 10204/3.1B mill certificates.
Super Duplex Sheet & Plate Specifications
| Standards | ASTM A240 / ASME SA-240 |
|---|---|
| Grades | 2507 (UNS S32750, 1.4410, F53); S32760 (1.4501, F55) |
| Thickness | 0.5 mm to 100 mm |
| Width | 1000 mm to 2500 mm |
| Length | 1000 mm to 6000 mm (custom available) |
| Surface Finishes | No.1, 2B, 2D, BA, No.4, No.8 (mirror) |
| Supply Condition | Solution annealed (min 1050°C), quenched |
What are Super Duplex Steel Sheets and Plates?
Super Duplex sheets and plates are flat products from high-alloy duplex stainless steels with a two-phase (austenite + ferrite) structure and PREN above 40. Sheets are under 6 mm thick for lining work. Plates are 6 mm and above for pressure vessels and subsea equipment. Solution annealing at 1050°C minimum with rapid quenching maintains the correct phase balance.
It mainly consists of chromium (24-26%), nickel (6-8%), molybdenum (3-4%), and nitrogen (0.24-0.32%). S32760 adds tungsten and copper for reducing-acid resistance. Compared to Duplex 2205, Super Duplex has higher PREN (above 40 vs 34-36), yield strength (~80 ksi vs ~65 ksi), and CPT (above 50°C vs ~35°C).
Types and Forms of Super Duplex Steel Sheets & Plates
Super Duplex Hot Rolled Plates
Super Duplex Cold Rolled Sheets
Super Duplex Polished Sheets
Super Duplex Chequered Plates
Super Duplex Coils and Strips
Super Duplex Shim Sheets
Super Duplex Clad Plates
Get Super Duplex Steel Sheets & Plates at Competitive Prices
Available Grades of Super Duplex Steel Sheets & Plates
Super Duplex 2507 Sheet & Plate
Super Duplex 2507 is the most widely used super duplex grade with 25% Cr, 7% Ni, 4% Mo, and PREN of ~42. It has a yield strength of 80 ksi (550 MPa) minimum.
Super Duplex S32760 Sheet & Plate
Super duplex S32760 contains tungsten (~0.5-1%) and copper (~0.5-1%) for resistance to reducing acids and sour gas cracking. It has a PREN above 40. This grade is used on offshore platforms and in FGD systems.
Super Duplex S32950 Sheet & Plate
Super duplex S32950 contains 26% Cr, 3.5% Mo, 4.5% Ni. It is used in specific applications requiring enhanced corrosion resistance to oxidising media.
Industries and Applications of Super Duplex Steel Sheets & Plates
- Offshore Oil & Gas: Subsea manifolds, risers, and heat exchangers.
- Desalination: Super duplex flat products are found in high-pressure RO piping and brine systems.
- Chemical Processing: Reactors and acid handling equipment.
- Marine & Subsea: Seawater systems and submarine pipelines.
- Pulp & Paper: Digesters and bleach plant equipment.
- Mining: Leaching equipment and acidic slurry piping.
- Power Generation & FGD: Scrubbers and stack liners use super duplex steel flat products.
