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Super Duplex 2507 (S32750) | Product Overview
Introduction To Super Duplex Stainless Steel 2507
Super Duplex Stainless Steel 2507 (S32750) is a premium duplex stainless steel grade with exceptional corrosion resistance and high mechanical strength. Featuring high levels of chromium (25%), molybdenum (4%), and nitrogen, this alloy offers unmatched resistance to pitting, crevice corrosion, and stress corrosion cracking, particularly in chloride-rich and aggressive environments.
Moksh Tubes & Fittings LLP is a trusted supplier, exporter, importer, and stockist of Super Duplex Stainless Steel 2507 (UNS S32750 / ASTM A182 F53). We offer Pipes & Tubes, Sheets, Plates, Coils, Bars, Pipe Fittings, Flanges, Fasteners, Welding Rods, Wire Mesh, and custom-fabricated components.
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Duplex Stainless Steel S31803 Specifications
| Category | Details |
|---|---|
| Grade | Duplex S31803 / UNS S31803 / 2205 / EN 1.4462 |
| Type | Duplex Stainless Steel (Austenitic–Ferritic) |
| Typical Chemical Composition | 22% Cr, 5–6% Ni, 3% Mo, 0.14–0.20% N |
| Conditions | Annealed, Solution Annealed, Hot Rolled, Cold Worked |
| Heat Treatment | Solution Annealing |
| Testing | Tensile, Hardness, Microstructure, PMI, UT, IGC |
| Certification | EN 10204 3.1 / 3.2 |
Chemical Composition of Super Duplex 2507
| Element | Composition (%) |
|---|---|
| Chromium (Cr) | 24.0 – 26.0 |
| Nickel (Ni) | 6.0 – 8.0 |
| Molybdenum (Mo) | 3.0 – 5.0 |
| Nitrogen (N) | 0.24 – 0.32 |
| Manganese (Mn) | ≤ 2.00 |
| Silicon (Si) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.020 |
| Carbon (C) | ≤ 0.030 |
| Iron (Fe) | Balance |
PREN ≥ 40 → Confirms Super Duplex category with excellent seawater resistance.
Technical Properties of Super Duplex Stainless Steel 2507
Physical Properties of Super Duplex Stainless Steel 2507
| Property | Value |
|---|---|
| Density | 7.80 g/cm³ |
| Melting Point | 1390–1450°C |
| Elastic Modulus | 200 GPa (29,000 ksi) |
| Thermal Conductivity @100°C | 16–19 W/m·K |
| Specific Heat | 500 J/kg·K |
| Magnetic Response | Slightly Magnetic |
Heat Treatment of Super Duplex Stainless Steel 2507
| Heat Treatment Process | Temperature Range | Cooling / Procedure |
|---|---|---|
| Solution Annealing | 1020–1100°C | Rapid water quench to restore duplex structure |
| Stress Relieving | 350–450°C | Air cool; short duration only to avoid sigma phase |
| Aging / Precipitation (Not applicable) | — | 2507 cannot be precipitation hardened |
| Hardening | — | Cannot be hardened by heat treatment (only cold working increases hardness) |
| Post-Weld Heat Treatment (PWHT) | — | Not recommended; control heat input during welding |
Mechanical Properties of Duplex Stainless Steel S31803
| Property | Metric | Imperial |
|---|---|---|
| Tensile Strength | 750–850 MPa | 108,700–123,300 psi |
| Yield Strength (0.2%) | 550–650 MPa | 79,800–94,300 psi |
| Elongation | ≥ 25% | ≥ 25% |
| Hardness | ≤ 92 HRB | ≤ 92 HRB |
| Impact Toughness | Excellent | Excellent |
| PREN | ≥ 40 | ≥ 40 |
International Standards & Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| EN | 1.4410 (X2CrNiMoN25-7-4) |
| UNS | S32750 |
| ASTM / ASME | A182 F53, A479, A276, A789, A790 |
| DIN | W.Nr. 1.4410 |
| ISO | ISO 15510 – X2CrNiMoN25-7-4 |
| BS (British Standard) | 310S25 / 1.4410 Equivalent |
| NORSOK | MDS D55 |
| API | API 5LD (for duplex/super duplex pipes) |
Products in Duplex Stainless Steel S31803
Duplex Stainless Steel S31803 is available in a variety of mill forms:
✔
Seamless Pipes
✔
Welded Pipes (ERW & EFW)
✔
Tubes (Capillary, U-Bend)
✔
Sheets & Plates
✔
Coils & Strips
✔
Round Bars, Flat Bars, Hex Bars, Square Bars
✔
Pipe Fittings (Elbows, Tees, Reducers, Caps, Stub Ends)
✔
Flanges (Weld Neck, Slip-On, Blind, Socket Weld, Threaded)
✔
Fasteners (Bolts, Nuts, Screws, Washers, Studs)
✔
Custom Fabricated Components
We supply Duplex Stainless Steel S31803 materials in accordance with the most stringent industry standards:
Uses and Advantages
Highest corrosion resistance among duplex stainless steels
Exceptional resistance to pitting and crevice corrosion, even in seawater and acidic environments
Excellent resistance to chloride stress corrosion cracking
High mechanical strength (twice that of austenitic stainless steels)
Long service life in the most aggressive environments
Good weldability and formability
Applications of Super Duplex Stainless Steel 2507 (S32750)
Offshore Oil & Gas Platforms
Subsea equipment and offshore installations.
Desalination Plants
Components and seawater cooling systems.
Chemical Processing
Reactors, heat exchangers, and piping systems.
Marine Engineering
Structural components in corrosive environments.
Pressure Vessels & Flanges
Equipment in corrosive conditions and chloride-rich fluids.
WHY CHOOSE US?
Super Duplex 2507 Price in India
Typical Range: ₹600 – ₹1,200 per kg
(Price varies with size, thickness, product form & order volume.)
Contact us for exact quotation based on size and quantity.
FAQ's
Why is Super Duplex 2507 (S32750) considered superior?
Due to its high chromium, molybdenum, and nitrogen content, it offers the highest corrosion resistance among duplex stainless steels, especially in chloride environments.
Is S32750 weldable?
Yes, but controlled heat input and post-weld heat treatment are essential to maintain corrosion resistance and mechanical properties.
Where is S32750 most commonly used?
In offshore oil & gas, marine engineering, chemical processing, and desalination plants where maximum corrosion resistance is required.
Can S32750 be used in seawater applications?
Yes — it is exceptionally resistant to seawater corrosion and chloride stress corrosion cracking, making it ideal for marine environments.
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For inquiries, pricing, or customized Super Duplex Stainless Steel 2507 solutions, Moksh Tubes & Fittings LLP is your reliable partner in Super Duplex Stainless Steel 2507.
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