Duplex & Super Duplex Stainless Steel – Supplier & Stockist in India
At Ozair Tradelink, we are one of India’s trusted suppliers, exporters, and stockists of Duplex & Super Duplex Stainless Steel raw materials, offering premium quality sheets, plates, coils, round bars, pipes, tubes, fittings, flanges, fasteners, and custom-made products.
Our materials are widely used in chemical, offshore, marine, petrochemical, desalination, and high-pressure applications.
What is Duplex & Super Duplex Stainless Steel?
Duplex Stainless Steel is known for its dual-phase microstructure (ferritic + austenitic), giving it:
High strength
Excellent corrosion resistance
Better stress corrosion cracking resistance
Superior weldability
Super Duplex Stainless Steel further improves these properties with higher chromium, molybdenum, and nitrogen content, making it ideal for extreme corrosion environments, seawater handling, and chemical processing.
To understand how Duplex materials compare with other high-nickel alloys, check our page:
Inconel & High Nickel Alloys
Duplex & Super Duplex Grades We Supply
Duplex Grades
Duplex 2205 (UNS S32205 / S31803)
Lean Duplex 2101
Duplex 2304
Super Duplex Grades
Super Duplex 2507 (UNS S32750)
Super Duplex S32760 (Zeron 100 Equivalent)
For more stainless steel products, visit:
Our Stainless Steel Products
Applications of Duplex & Super Duplex Steel
| Industry | Applications / Components |
|---|---|
| Oil & Gas Industry | Subsea piping, manifolds, risers, flowlines, separators, pressure vessels, heat exchangers, offshore structures, valves & fittings. |
| Marine & Offshore Engineering | Desalination plants, seawater cooling systems, shipbuilding components, offshore platform supports, seawater intakes. |
| Chemical & Petrochemical | Reactors, chemical tanks, process piping, distillation columns, condensers, pumps, valves, and corrosion-exposed parts. |
| Desalination & Water Treatment | Reverse osmosis plants, brine lines, pressure vessels, RO skids, seawater intake systems, filtration units. |
| Power Generation | Heat exchangers, condensers, cooling tower parts, flue gas desulphurisation systems, steam generation components. |
| Pulp & Paper Industry | Slurry piping, digesters, bleaching equipment, liquor tanks, chemical recovery systems. |
| Mining & Mineral Processing | Slurry pipelines, processing equipment, pressure vessels, aggressive media handling systems. |
| Food, Pharma & Biotechnology | Process piping, hygienic tanks, heat exchangers, mixers, CIP/SIP systems. |
| Structural & Fabrication | High-strength load-bearing structures, bridges in marine climates, high-corrosion-risk infrastructure. |
| General Engineering | Shafts, fasteners, flanges, fittings, manifolds, custom machined parts for corrosive environments. |
Duplex 2205 (UNS S32205 / S31803) – Chemical Composition
| Element | Percentage (%) |
|---|---|
| Chromium (Cr) | 21.0 – 23.0 |
| Nickel (Ni) | 4.5 – 6.5 |
| Molybdenum (Mo) | 2.5 – 3.5 |
| Manganese (Mn) | ≤ 2.0 |
| Silicon (Si) | ≤ 1.0 |
| Carbon (C) | ≤ 0.03 |
| Nitrogen (N) | 0.14 – 0.20 |
| Phosphorus (P) | ≤ 0.03 |
| Sulfur (S) | ≤ 0.02 |
Duplex 2205 – Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (0.2% Proof) | ≥ 515 MPa |
| Tensile Strength | 620 – 880 MPa |
| Elongation | ≥ 25% |
| Hardness | ≤ 290 HB |
| Impact Strength | High (Charpy V-Notch) |
Super Duplex 2507 (UNS S32750) – Chemical Composition
| Element | Percentage (%) |
|---|---|
| Chromium (Cr) | 24.0 – 26.0 |
| Nickel (Ni) | 6.0 – 8.0 |
| Molybdenum (Mo) | 3.0 – 5.0 |
| Manganese (Mn) | ≤ 1.2 |
| Silicon (Si) | ≤ 0.8 |
| Carbon (C) | ≤ 0.03 |
| Nitrogen (N) | 0.24 – 0.32 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.02 |
Super Duplex 2507 – Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (0.2% Proof) | ≥ 550 MPa |
| Tensile Strength | 800 – 1000 MPa |
| Elongation | ≥ 15% |
| Hardness | ≤ 310 HB |
| Impact Strength | Excellent (Even at low temperatures) |
Super Duplex 2507 – Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (0.2% Proof) | ≥ 550 MPa |
| Tensile Strength | 800 – 1000 MPa |
| Elongation | ≥ 15% |
| Hardness | ≤ 310 HB |
| Impact Strength | Excellent (Even at low temperatures) |
Super Duplex 2507 Equivalent Grades
| Standard | Grade |
|---|---|
| UNS | S32750 |
| UNS (Alternate) | S32760 (Zeron 100 Equivalent) |
| EN / DIN | 1.4410 |
| ASTM | A240, A276, A479, A182 |
| Werkstoff | 1.4410 |
| AFNOR | Z3 CN 25.06 Az |
Size Range of Duplex & Super Duplex Products
Sheets / Plates / Coils
| Product | Thickness Range | Width | Length |
|---|---|---|---|
| Sheets | 0.5 mm – 50 mm | 1000 / 1250 / 1500 mm | 2500 – 6000 mm |
| Plates | 5 mm – 80 mm | Up to 2000 mm | Custom Length |
| Coils | 0.5 mm – 5 mm | Up to 1500 mm | NA |
Pipes & Tubes
| Product | Outer Diameter (OD) | Thickness (WT) | Type |
|---|---|---|---|
| Seamless Pipes | 6 mm – 609 mm | 1 mm – 60 mm | Cold/Hot Finished |
| Welded Pipes | 1/2″ – 24″ | Sch 10 – Sch XXS | ERW / EFW |
| Instrumentation Tubes | 6 mm – 50 mm | 1 mm – 4 mm | Bright Annealed |
Round Bars & Rods
| Diameter | Form |
|---|---|
| 6 mm – 450 mm | Black, Bright, Peeled, Forged |
Product Forms Available in Duplex & Super Duplex
| Category | Products |
|---|---|
| Raw Materials | Sheets, Plates, Coils, Strips, Bars, Billets, Rods |
| Pipe Products | Seamless Pipes, Welded Pipes, Tubes, Heat Exchanger Tubes, Instrumentation Tubes |
| Fittings | Buttweld Fittings, Socket Weld Fittings, Forged Fittings, Elbows, Tees, Reducers, Caps |
| Flanges | Slip-on, Weld Neck, Blind, Threaded, Socket Weld, Long Weld Neck, RTJ Flanges |
| Fasteners | Bolts, Nuts, Washers, Studs, Screws, Threaded Rods |
| Fabricated Items | Custom parts, Profiles, Machined Components |
Corrosion Resistance Comparison Table (Duplex vs Super Duplex)
Corrosion Resistance Comparison
| Property | Duplex Stainless Steel | Super Duplex Stainless Steel |
|---|---|---|
| Pitting Corrosion Resistance | Medium to High | Very High (Excellent in chloride environments) |
| Stress Corrosion Cracking Resistance | High | High to Very High |
| Crevice Corrosion Resistance | Medium | High |
| General Corrosion Resistance | Better than 304/316 | Superior among all stainless steels |
| Suitable Environments | Moderate chloride, chemical plants | High chloride, seawater, offshore |
International Standards for Duplex & Super Duplex Steel
International Standards
| Standard Body | Duplex Steel | Super Duplex Steel |
|---|---|---|
| ASTM | ASTM A182, A240, A789, A790 | ASTM A182, A240, A815, A928 |
| EN / DIN | EN 1.4462 | EN 1.4410 |
| UNS | S31803 / S32205 | S32750 / S32760 |
| WNR | 1.4462 | 1.4410 |
| NACE | MR0175 | MR0175/ISO 15156 |
Duplex vs Super Duplex Steel – Price Range (Indicative Table)
Indicative Price Comparison
| Product | Duplex Steel (Approx.) | Super Duplex Steel (Approx.) |
|---|---|---|
| Sheets & Plates | ₹ 300 – 500 / Kg | ₹ 600 – 900 / Kg |
| Round Bars | ₹ 350 – 550 / Kg | ₹ 650 – 1000 / Kg |
| Pipes | ₹ 400 – 650 / Kg | ₹ 800 – 1200 / Kg |
| Flanges | ₹ 450 – 700 / Kg | ₹ 900 – 1400 / Kg |
| Fasteners | ₹ 20 – 70 / Pc | ₹ 40 – 120 / Pc |
Equivalent Grades Comparison Table
Equivalent Grades of Duplex & Super Duplex
| Material Type | UNS | EN / DIN | WNR |
|---|---|---|---|
| Duplex 2205 | S31803 / S32205 | 1.4462 | 1.4462 |
| Super Duplex 2507 | S32750 | 1.4410 | 1.4410 |
| Super Duplex S32760 | S32760 | 1.4501 | 1.4501 |
| Lean Duplex 2101 | S32101 | 1.4162 | 1.4162 |
Frequently Asked Questions (FAQ)
1. What is the difference between Duplex and Super Duplex Stainless Steel?
Duplex steel contains a balanced mix of ferrite and austenite, providing high strength and corrosion resistance.
Super Duplex contains higher levels of Cr, Mo, and N, making it more resistant to pitting and suitable for extreme environments.
2. Where are Duplex and Super Duplex steels used?
They are used in desalination plants, chemical industries, marine engineering, oil & gas, offshore platforms, refineries, and water treatment systems.
3. Do you supply test certificates with material?
Yes, Ozair Tradelink provides EN 10204 3.1 Mill Test Certificates, and NABL lab test reports on request.
4. Can Duplex 2205 replace Stainless Steel 316?
Yes. Duplex 2205 offers double the strength and better chloride resistance compared to SS316.
5. Do you export Duplex & Super Duplex materials?
Yes, we export to UAE, Saudi Arabia, Kuwait, Qatar, Oman, Europe, Africa, Singapore, Bangladesh, and more.
Why Buy from Ozair Tradelink?
Trusted stockist in India with ready inventory
Mill test certificates (EN 10204 3.1)
NABL-approved test reports available
Custom sizes and urgent deliveries
Export packaging (wooden boxes, pallets, bundles)
Supplying Duplex & Super Duplex Steel Across India
| Region | Cities We Supply To | Industries |
|---|---|---|
| West India | Mumbai, Pune, Ahmedabad, Vadodara, Surat, Rajkot, Nagpur | Aerospace, Chemical, Fabrication, Oil & Gas |
| South India | Bengaluru, Chennai, Hyderabad, Coimbatore, Kochi, Visakhapatnam | Defence, Medical, Marine, Engineering |
| North India | Delhi, Gurgaon, Noida, Ghaziabad, Jaipur, Chandigarh, Ludhiana | Automotive, OEM, EPC Projects |
| East India | Kolkata, Bhubaneswar, Jamshedpur, Ranchi, Guwahati | Steel Plants, Chemical Processing, Power Plants |
| Central India | Indore, Bhopal, Raipur, Nagpur | Heavy Engineering, Fabrication, Manufacturing |
Exporting Duplex & Super Duplex Steel to Global Markets
| Region | Countries We Export To | Major Export Industries |
|---|---|---|
| Middle East | UAE, Saudi Arabia, Qatar, Oman, Kuwait, Bahrain | Oil & Gas, Petrochemical, Marine |
| Europe | Germany, France, Italy, Spain, Netherlands, UK, Poland | Aerospace, Automotive, Medical Devices |
| Asia | Japan, South Korea, Singapore, Malaysia, Thailand, Vietnam | Electronics, Shipbuilding, Engineering |
| Africa | South Africa, Egypt, Nigeria, Kenya, Morocco | Mining, Construction, Water Treatment |
| North America | USA, Canada, Mexico | Aerospace, Defence, Renewable Energy |
| South America | Brazil, Argentina, Chile, Peru | Chemical Processing, Marine, Industrial Fabrication |
| Australia & Oceania | Australia, New Zealand | Mining, Marine, Defence |
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