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ASTM A240 S32760 Super Duplex Stainless Steel Plate UNS S32760 with Tungsten Alloying and PREN >40
| MOQ: | 5Ton |
| Delivery Period: | 7-15 |
| Payment Method: | L/C,D/A,D/P,T/T,Western Union |
Shaanxi Shangyou Stainless Steel Co., Ltd. supplies ASTM A240 S32760 super duplex stainless steel plate for global distributors, fabricators, equipment manufacturers, and EPC contractors requiring maximum corrosion resistance and high strength in the most demanding environments. Produced to ASTM A240/A240M as UNS S32760 (also equivalent to EN 1.4501, F55, and X2CrNiMoCuWN 25-7-4), this super duplex stainless steel is the premier grade for offshore, seawater, and sour service applications.
S32760 is distinguished by its unique tungsten addition (0.5-1.0%) combined with copper (0.5-1.0%), which further enhances the alloy's corrosion resistance beyond that of standard super duplex grades like S32750 . With high chromium (24-26%), molybdenum (3-4%), and nitrogen (0.20-0.30%) content, this alloy delivers a Pitting Resistance Equivalent Number (PREN) exceeding 40, providing outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking in chloride-containing and acidic environments . The balanced duplex microstructure (approximately 50% ferrite / 50% austenite) offers yield strength approximately 2.7 times that of 316L (≥550 MPa vs ~205 MPa). The alloy is listed in NACE MR0175 for sour service and approved by ASME for pressure vessel applications .
| Dimension | Specification |
|---|---|
| Product Name | ASTM A240 S32760 Super Duplex Stainless Steel Plate |
| Product Alias | UNS S32760 Plate / EN 1.4501 Plate / F55 Plate / X2CrNiMoCuWN 25-7-4 / Super Duplex 32760 |
| Material Type | Super Duplex (Austenitic-Ferritic) Stainless Steel (~50% Ferrite / ~50% Austenite) |
| Key Feature | Tungsten addition (0.5-1.0%) and PREN>40 provide exceptional resistance to seawater, pitting, crevice corrosion, and SCC; NACE MR0175 compliant for sour service |
| Chemical Composition | Cr 24.0-26.0% / Ni 6.0-8.0% / Mo 3.0-4.0% / N 0.20-0.30% / W 0.50-1.00% / Cu 0.50-1.00% / C ≤0.03% / Mn ≤1.00% / Fe Balance |
| Mechanical Properties | Tensile ≥750 MPa / Yield ≥550 MPa / Elongation ≥25% / Hardness ≤270 HB |
| Physical Properties | Density ~7.81 g/cm3 / Elastic Modulus ~199 GPa / Melting Point ~1350°C |
| Manufacturing Process | Hot Rolling / Cold Rolling / Solution Annealing 1100-1150°C / Water Quenching |
| Surface Finish | 2B / BA / No.1 / No.4 / HL / 8K |
| Primary Applications | Offshore Oil & Gas / Seawater Systems / Desalination / Chemical Processing / FGD / Marine Propulsion |
| Parameter | Available Options |
|---|---|
| Product Standard | ASTM A240/A240M, ASTM A480, ASME SA-240 |
| Grade Equivalents | UNS S32760 / EN 1.4501 / F55 / X2CrNiMoCuWN 25-7-4 |
| Thickness | Cold Rolled: 0.5-6.0mm; Hot Rolled: 3.0-150.0mm+ (heavier on request) |
| Width | 1000mm, 1219mm (4ft), 1500mm, 2000mm, or customized |
| Length | 2000mm-6000mm (standard 4×8ft: 1219×2438mm) or customized |
| Surface Finish | 2B / BA / No.1 / No.4 / HL / 8K |
| Edge Condition | Mill Edge / Slit Edge / Sheared Edge |
| Ferrite Content | 35-55% (microstructure certified free from sigma, chi, and laves phases) |
| Inspection | PMI / Tensile / Hardness / Pitting Test (ASTM G48A) / Ultrasonic Test |
| Documents | MTC 3.1 / Inspection Reports / Packing List / Heat Number Traceability |
ASTM A240 S32760 super duplex stainless steel plate is specified for the most demanding environments where standard grades and even 2205 duplex may not provide sufficient corrosion resistance or strength .
Typical applications include:
- Offshore oil and gas: wellhead equipment, subsea components, Christmas trees, manifolds, pipework, pumps, valves, chokes, connectors, band clamps, and bolting
- Seawater systems: propeller shafts, heat exchangers, cooling water systems, firefighting systems, desalination plants
- Chemical processing: pressure vessels, reactors, pumps, valves, and piping handling aggressive chemicals
- Flue gas desulfurization (FGD) scrubbers and pollution control systems
- Pulp and paper: bleaching equipment, black liquor heater tubes, digesters, brownstock washers
- Marine and shipbuilding: shafts, rudders, seals, pumps, fasteners, instrumentation
Key selection considerations: The tungsten addition provides enhanced corrosion resistance in acidic environments compared to S32750 . Suggested operating range is up to 280-300°C; prolonged exposure above 300°C should be avoided due to potential embrittlement . The alloy is magnetic due to ferrite content (35-55%). For extreme oxidizing media, higher-alloyed grades may be required. S32760 is often considered a cost-effective alternative to Grade 5 titanium or nickel-based alloys in many applications .
Shangyou Stainless Steel provides value-added processing including cut-to-length, slitting, polishing, laser cutting, bending and forming, and protective film application.
All plates are packed with export-standard protection including protective paper between sheets, edge protection, steel strapping, waterproof wrapping, and wooden pallets or steel frames.
Quality documents include MTC 3.1, inspection reports, packing list, and heat number traceability. Third-party inspection (SGS, TUV, BV) can be arranged upon request.
1. What is S32760 super duplex stainless steel?
S32760 (UNS S32760, EN 1.4501, F55) is a super duplex stainless steel with tungsten and copper additions, offering PREN>40 and exceptional resistance to seawater, pitting, crevice corrosion, and stress corrosion cracking .
2. What is the difference between S32760 and S32750 (2507)?
S32760 contains tungsten (0.5-1.0%) and copper (0.5-1.0%) additions not present in S32750, providing enhanced corrosion resistance in acidic and sour environments . S32760 is also listed under EN 1.4501, while S32750 is EN 1.4410.
3. What is the PREN of S32760?
S32760 has a Pitting Resistance Equivalent Number (PREN) exceeding 40, providing superior resistance to pitting and crevice corrosion .
4. Is S32760 suitable for sour service?
Yes. S32760 is listed in NACE MR0175 for sour service applications, offering outstanding resistance to sulphide-stress corrosion cracking .
5. What thickness ranges are available for S32760 plate?
Cold rolled sheet from 0.5mm to 6.0mm; hot rolled plate from 3.0mm to 150.0mm. Heavier thicknesses available on request .
6. Is S32760 stainless steel magnetic?
Yes. Due to its ferrite content (35-55%), S32760 is magnetic .
7. What is the maximum service temperature for S32760?
Maximum temperature for long periods of service is 280°C (536°F), with short-term capability up to 300°C (572°F) .
8. Can S32760 be welded?
Yes. S32760 offers good weldability with no post-weld heat treatment generally required. Nitrogen addition enhances tenacity and corrosion resistance of the heat-affected zone .
9. What documents are provided with delivery?
MTC 3.1, inspection reports, packing list, and heat number traceability.
10. Is third-party inspection available?
Yes, SGS, TUV, or BV upon request.
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