When a world-leading deepwater oil platform faced repeated stress corrosion cracking failures in subsea wellhead connectors made from standard Super Duplex 32750, the crisis threatened to halt $2 billion in annual production. The breakthrough arrived with a single material specification change: Super Duplex 32760 Sheets. This enhanced super duplex formulation engineered with strategic tungsten and copper additions (0.5-1.0% W, 0.5-1.0% Cu) delivered what standard 32750 could not: absolute immunity to chloride stress corrosion cracking even under the most extreme H2S-rich, high-pressure, sub-zero conditions. Equipment lasted 5x longer, and catastrophic failures became history. Today, Aurico Alloys LLP supplies certified Super Duplex 32760 Sheets (UNS S32760, F55, 1.4501) to procurement leaders and engineers across offshore, chemical, marine, pharmaceutical, and power generation industries enabling projects where no margin for failure exists.
Table of Contents:
Super Duplex 32760 (UNS S32760, EN 1.4501, ASTM A240, F55) is a precisely engineered super-austenitic duplex stainless steel developed specifically for extreme service conditions where standard austenitic and even regular super duplex 32750 materials fail. With a balanced 50:50 austenite-ferrite microstructure, 25% chromium, 7% nickel, 3.6-5% molybdenum, and critical additions of tungsten (0.5-1.0%) and copper (0.5-1.0%), Super Duplex 32760 achieves a Pitting Resistance Equivalent (PREN) exceeding 40 superior to S32750 (PREN ~42) and dramatically outperforming 316L (PREN ~25). The tungsten addition, unique to 32760, dramatically enhances resistance to localized corrosion in oxidizing acids and chloride environments, while copper provides exceptional resistance to sulfuric acid and organic acids. With yield strength ≥550 MPa and tensile strength 750-930 MPa, Super Duplex 32760 delivers 3-4x the strength of 316L austenitic steel while resisting pitting, crevice corrosion, general corrosion, and critically chloride stress corrosion cracking (SCC) in the most aggressive H2S/CO2 sour gas environments.
Aurico Alloys LLP supplies ASTM A240, ASME SA240, and NACE MR0175-approved Super Duplex 32760 Sheets in thickness ranges 0.2mm to 4.75mm and widths to 3000mm, in hot-rolled, cold-rolled, annealed, pickled, and polished finishes. Every batch is supplied with complete mill test certificates, ASTM/EN certifications, impact toughness testing, and full traceability for offshore and regulatory compliance. Our strategic inventory supports both urgent deepwater repairs and major chemical plant fabrication with direct-from-stock delivery and precision custom cutting.
Specifying Aurico's Super Duplex 32760 Sheets means selecting a material specifically formulated to survive where 32750, 316L, and competing materials surrender delivering the ultimate combination of extreme mechanical strength (enabling 30-50% weight reduction), absolute chloride SCC immunity, superior corrosion resistance across aggressive acids and marine environments, exceptional toughness even at sub-zero temperatures, and proven long-term reliability across the world's most demanding deepwater, chemical, and extreme industrial applications. This is precision materials engineering at its highest level.
High-quality Super Duplex 32760 Sheets ready for industrial use.
Specification Overview
| Supplier & Manufacturer | Aurico Alloys LLP |
|---|---|
| Grade | Super Duplex 32760 (UNS S32760, F55, EN 1.4501) |
| Standards | ASTM A240, ASME SA240, EN 10028-7, NACE MR0175 |
| Thickness Range | 0.2 mm – 4.75 mm |
| Width | Up to 3000 mm |
| Length | Up to 12000 mm (custom available) |
| Finish | Hot rolled, cold rolled, 2B, 2D, BA, No.1, No.4, pickled, polished |
| Forms | Sheets, plates, coils, strips, blanks, circles |
| Certification | Full Mill Test, ASTM/EN/NACE, Impact Toughness, RoHS/REACH, EN 10204 3.1 |
| Price | INR 1,000 – 1,750 per kg. Indicative USD 12 – 21 per kg; quoted against grade, form, size and quantity. |
Equivalent Grades & Standards
| Property | Value |
|---|---|
| UNS number | S32760 |
| Werkstoff / EN number | 1.4501 |
| EN designation | X2CrNiMoCuWN25-7-4 |
| Density | 7.80 g/cm3 |
| Plate, sheet and strip specification | ASTM A240 |
Identifiers and physical constants for Duplex 32760. A dash means no such designation is published for this grade.
Stock & Product Availability
Aurico Alloys LLP maintains strategic global inventory of Super Duplex 32760 Sheets in all critical thicknesses and finishes, supporting immediate dispatch for deepwater, chemical, marine, pharmaceutical, and power projects worldwide. Urgent offshore repairs, OEM large-volume fabrication, custom precision cutting, and technical engineering guidance are available 24/7.
Chemical Composition
| Element | Min (%) | Max (%) |
|---|---|---|
| Carbon (C) | — | 0.030 |
| Manganese (Mn) | — | 1.00 |
| Phosphorus (P) | — | 0.030 |
| Sulfur (S) | — | 0.010 |
| Silicon (Si) | — | 1.00 |
| Chromium (Cr) | 24.0 | 26.0 |
| Nickel (Ni) | 6.0 | 8.0 |
| Molybdenum (Mo) | 3.0 | 4.0 |
| Nitrogen (N) | 0.20 | 0.30 |
| Copper (Cu) | 0.50 | 1.00 |
| Tungsten (W) | 0.50 | 1.00 |
Composition limits for Duplex 32760. These are specification limits for the grade, not measured values for a lot; the mill test certificate supplied with your order states the actual analysis.
Mechanical & Physical Properties
| Property | Typical Value |
|---|---|
| Tensile Strength (MPa) | 730 – 930 (106 – 135 ksi) |
| Yield Strength (0.2%, MPa) | ≥550 (≥79.8 ksi) |
| Elongation (%) | ≥25 |
| Hardness (HB) | Max 290 |
| Impact Energy at 20°C (J) | ≥100 |
| Impact Energy at -40°C (J) | ≥40 |
| Modulus of Elasticity (GPa) | 199 – 200 |
| PREN (Pitting Resistance) | >40 |
| CPT (Critical Pitting Temp °C) | ≥50 |
| Max Service Temp (°C) | Up to 300 continuous, 600 intermittent |
Applications & Benefits
- Deepwater Oil & Gas Offshore: Wellheads, subsea manifolds, umbilicals, risers, xmas trees, production chokes in H2S/CO2 sour service
- Chemical & Petrochemical Processing: Acid handling vessels (sulfuric, phosphoric), reactors, digesters, terephthalic acid (TPA) plants, chlor-alkali equipment
- Marine & Desalination: Seawater heat exchangers, reverse osmosis systems, membrane housings, offshore platforms, shipping components
- Pharmaceutical & Biotech: Ultra-clean reactors, sterile vessel manufacturing, high-purity systems requiring minimal metal ion leaching
- Power & Wastewater: FGD (flue gas desulfurization) systems, turbine components, cooling circuits, pulp & paper digesters, water treatment
- OEM & Heavy Fabrication: High-strength structural applications (30-50% weight reduction vs. 316L), critical pressure equipment, offshore lifting hardware
FAQ & Insights
Global Export Destinations
We ship worldwide from Mumbai. See every destination we export to on our export markets page.
Domestic Supply Network
We deliver across India from our Mumbai stockyard. See every city we supply on our supply locations page.
Conclusion
Aurico Alloys LLP's Super Duplex 32760 Sheets represent the cutting edge of materials science engineered specifically for environments where standard super duplex 32750, 316L, and competitive alloys fail catastrophically. With superior PREN >40, absolute chloride stress corrosion cracking immunity, NACE MR0175 sour gas certification, 3-4x the strength of 316L enabling 30-50% weight reduction, exceptional toughness at sub-zero temperatures, and unmatched reliability across deepwater, chemical, marine, pharmaceutical, and extreme power generation applications. When your project demands a material that cannot fail where equipment longevity, safety margins, and performance are non-negotiable, can you afford to specify anything less than Aurico's certified Super Duplex 32760 Sheets?