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Super Duplex Steel S32760 Sheets & Plates Supplier in Mumbai, India - ASTM A240 UNS S32760
Nicorex Alloys is an ISO 9001 / ISO 14001 certified supplier of Super Duplex S32760 sheets and plates based in Mumbai, India. UNS S32760 (Werkstoff 1.4501, EN X2CrNiMoCuWN 25-7-4, trade name Zeron 100) is a Cu-W enhanced super duplex flat product manufactured to ASTM A240 / ASME SA240. S32760 contains carefully controlled additions of copper (0.5-1.0%) and tungsten (0.5-1.0%) to enhance its performance in service. Copper stabilises the passive film in reducing acids (H₂SO₄, HCl), while tungsten raises the pitting resistance index through the PRENW formula: %Cr + 3.3×%Mo + 16×%N + 1.65×%W ≥ 42.
S32760 offers a minimum yield strength of 550 MPa (80 ksi) and tensile strength of 750 MPa, with 25% elongation for good ductility. Hardness is limited to 310 HB (32 HRC max). The alloy is ferromagnetic and has a density of 7800 kg/m³ (0.28 lb/in³), with a melting point of about 1350°C. It is approved to NACE MR0175 / ISO 15156 for sour service and supplied as Grade F55 forgings per ASTM A182.
Super Duplex S32760 is available as sheet from 0.5-6.0 mm thick and plate from 6.0-80 mm. Standard widths range from 1000 to 2500 mm, with lengths up to 6000 mm. Products include hot-rolled plate, cold-rolled sheet, strip, coil, chequered plate, and clad plate (to ASTM A264). Material is supplied solution annealed and pickled, with No.1, 2B, or BA finishes, and ships with EN 10204 3.1 MTC, PMI, and full traceability.
Super Duplex S32760 Sheet & Plate Specifications
| Standard | ASTM A240 / ASME SA240 |
|---|---|
| Sheet Thickness | 0.5 – 6.0 mm |
| Plate Thickness | 6.0 – 80 mm |
| Width | 1000, 1250, 1500, 2000, 2500 mm |
| Condition | Solution Annealed & Pickled |
| Finish | No.1 (HR), 2B, BA |
| Hardness | ≤310 HB / 32 HRC |
| NACE / Forging | MR0175 / ISO 15156; F55 per ASTM A182 |
S32760 vs S32750 - When to specify each for Sheet & Plate
Choose S32760: mixed reducing acid + chloride environments (H₂SO₄ + Cl⁻), dilute HCl service, sour gas with acid contamination, defence/naval Zeron 100 specs, sulphide SCC as primary failure concern.
Choose S32750: pure chloride environments (seawater, brine), standard sour service without reducing acids, cost sensitivity (S32760 costs 10-20% more), availability urgency (S32750 is more widely stocked).
Chemical Composition of Super Duplex S32760 Sheet & Plate
S32760 chemical composition per ASTM A240 is detailed here, with parallel S32750 values included to enable direct grade comparison:
| Element | Chromium (Cr) | Nickel (Ni) | Molybdenum (Mo) | Nitrogen (N) | Copper (Cu) | Tungsten (W) | Carbon (C) | Sulphur (S) | Iron (Fe) |
|---|---|---|---|---|---|---|---|---|---|
| S32760 | 24.0 – 26.0 | 6.0 – 8.0 | 3.0 – 4.0 | 0.20 – 0.30 | 0.50 – 1.00 | 0.50 – 1.00 | 0.030 max | 0.010 max | Balance |
| S32750 | 24.0 – 26.0 | 6.0 – 8.0 | 3.0 – 5.0 | 0.24 – 0.32 | Not specified | Not specified | 0.030 max | 0.020 max | Balance |
Mechanical Properties of ASTM A240 Super Duplex S32760 Sheet & Plate
| Property | Yield 0.2% Offset | Tensile Strength | Elongation | Hardness (max) |
|---|---|---|---|---|
| S32760 Min | 550 MPa (80 ksi) | 750 MPa (109 ksi) | 25% | 310 HB / 32 HRC |
| S32750 Min | 550 MPa (80 ksi) | 800 MPa (116 ksi) | 15% | 310 HB / 32 HRC |
S32760 delivers 25% elongation vs S32750’s 15%. That ductility advantage makes Zeron 100 plates better for cold-formed and complex fabricated structures. Impact toughness holds in the HAZ even with Cu + W.
Super Duplex S32760 Sheet & Plate Equivalent Grades
Equivalent designations for S32760 include international standards like UNS and Werkstoff numbers used across global specifications:
| Standard | UNS / Werkstoff | EN |
|---|---|---|
| Designation | S32760 / 1.4501 | X2CrNiMoCuWN 25-7-4 |
Physical Properties of Super Duplex S32760 Sheets & Plates
| Property | Density | Melting Point | Elastic Modulus | Thermal Conductivity | Thermal Expansion (20-100°C) | Magnetic |
|---|---|---|---|---|---|---|
| Value | 7800 kg/m³ (0.28 lb/in³) | ~1350°C (2462°F) | 190 GPa | 17 W/m·K | 13.0 µm/m/°C | Yes (ferromagnetic) |
Get Super Duplex S32760 Sheets & Plates at Competitive Prices
Available Forms of Super Duplex S32760 Sheet & Plate
Super Duplex S32760 Hot Rolled Plate
Super Duplex S32760 Cold Rolled Sheet
Super Duplex S32760 Strip & Coil
Super Duplex S32760 Chequered Plate
Super Duplex S32760 Clad Plate
Corrosion Resistance of Super Duplex S32760 Sheet & Plate
S32760 plates deliver PRENW ≥ 42, with a critical pitting temperature around 65°C in 6% FeCl₃. Tungsten improves crevice corrosion performance beyond what PREN alone predicts.
The copper addition is the primary differentiator. Cu catalyses passive film stability in reducing acids. In dilute H₂SO₄ and HCl, where S32750 and 316L fail, S32760 maintains low corrosion rates. Sulphide SCC resistance is outstanding, making Zeron 100 plates preferred for sour wells with mixed acid contamination.
Hot Working, Cold Forming & Heat Treatment of Super Duplex S32760
Hot form at 1020-1230°C. Solution anneal at ≥1100°C + rapid water quench. Cold forming needs higher forces than Duplex 2205, an intermediate anneal for severe work. Weld by GTAW, SMAW, or SAW using Zeron 100X matching filler (Cu + W). ERNiCrMo-14 for dissimilar joints. Ar + N₂ shielding. Interpass ≤100°C. No preheat or PWHT. ASTM A923 testing is recommended post-weld.
Industries using Super Duplex S32760 Sheet & Plate
- Oil & Gas (Sour Service): Xmas tree plates, manifold housings, choke valve parts, sour-gas pressure vessels. Sulphide SCC resistance in H₂S + Cl⁻. NACE MR0175.
- Chemical Processing: H₂SO₄ storage, HCl reactors, mixed-acid equipment. Cu-enhanced passive film in reducing conditions.
- Marine & Defence: Naval plates, submarine equipment, mine countermeasure systems.
- Desalination: High-pressure RO vessels and brine equipment.
- Pharmaceutical: BA-finish reactor vessels for mixed-acid processes.
How to order Super Duplex S32760 Sheet & Plate
- Product Form – Sheet, Plate, Coil, Strip, Shim
- Dimensions – Thickness × Width × Length in mm
- Material Grade – Super Duplex S32760 / UNS S32760 / F55
- Standard - ASTM A240 / ASME SA240
- Surface Finish - 2B, 2D, No.1, BA, No.4, #8 Mirror
- Edge Type – Mill Edge, Slit Edge, Trimmed
- Quantity - number of pieces, kg, or MT
- Additional Requirements - NACE MR0175 compliance, HIC/SSC testing, specific heat numbers, offshore / subsea service
- Documentation – MTC 3.1 per EN 10204, PMI report, third-party inspection certificate
- Packaging – Standard wooden box / export-grade sea-worthy packing / ISPM 15 compliant
- Delivery Destination – Domestic or export
Frequently Asked Questions
What is the price of Super Duplex S32760 Plate per Kg in India?
Indicative: ₹600-1,400/kg. 10-20% premium over S32750 due to Cu + W and limited production.
What is the difference between S32760 and S32750?
S32760 contains copper (0.5-1.0%) and tungsten (0.5-1.0%) which S32750 does not. Cu improves reducing acid resistance. W raises PRENW. Tighter sulphur (0.010% vs 0.020%). Higher ductility (25% vs 15%). NOT interchangeable.
What is Zeron 100?
Is S32760 NACE MR0175 compliant?
Yes. Approved provided hardness ≤32 HRC in solution-annealed condition. Outstanding sulphide SCC resistance.
Why does S32760 contain Copper?
What Welding Consumables are used for S32760 Plate?
Zeron 100X matching filler (Cu + W). ERNiCrMo-14 for dissimilar joints. GTAW with Ar + N₂. Interpass ≤100°C. No preheat/PWHT.
What is the Maximum Service Temperature for S32760 Plate?
-50°C to +300°C continuous. Sigma phase precipitates above 300°C. Not recommended for extended high-temperature exposure.