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Elvis Nickel Alloys, a trusted manufacturer and supplier located in Houston, USA, proudly offers high-quality Super Duplex Steel Fasteners that blend exceptional mechanical strength with remarkable corrosion resistance. Crafted from top-notch materials like UNS S32750 (SAF 2507) and UNS S32760 (Zeron® 100), these fasteners boast a dual-phase microstructure (austenitic-ferritic) that effectively resists chloride stress corrosion cracking, pitting, and crevice corrosion. Available in various forms such as hex bolts, nuts, washers, stud bolts, and screws, these fasteners meet international standards like ASTM A479, ASTM A276, and ASME B18.2.1, making them perfect for demanding environments.
Super Duplex Steel Fasteners generally contain 24–26% chromium, 6–8% nickel, 3–5% molybdenum, 0.2–0.3% nitrogen, along with trace amounts of copper, tungsten, and manganese. These alloying elements contribute to a high PREN (>40), ensuring outstanding resistance to localized corrosion in tough conditions. They can achieve tensile strength up to 800 MPa, yield strength of at least 550 MPa, and impressive impact toughness at both room and sub-zero temperatures. The well-balanced microstructure provides both strength and ductility, making these fasteners ideal for dynamic and high-pressure applications.
| Specification | IS, BS, ASTM, ASME |
| Grade | Super Duplex Steel | UNS S32750 | S32760 |
| Standard | ASTM A479 ASME SA479 |
| Length | 3mm to 200mm |
| Form | Screw, Nuts, Bolts, Washers |
| Size | 3/6″ to 2″, M3 – M56, Custom Sizes |
| Application | Oil & Gas, Heat exchanger and condenser, Automobile Industry, Engineering, Power plants, Refineries & Petrochemicals, Ship building, Desalination Plants |
| Phosphorus | Sulphur | Silicon | Carbon | Manganese | Nickel | Molybdenum | Nitrogen | Copper | Chromium |
|---|---|---|---|---|---|---|---|---|---|
| 0.035 % max | 0.02 % max | 0.80 % max | 0.03% Max | 1.20 % max | 6.00 – 8.00 % | 3.00 – 5.00 % | 0.24 – 0.32 % | 0.50 % max | 24.0 – 26.0 % |
| Grade | YS (MPa) | UTS (MPa) | % Elongation | Hardness(BHN) |
| UNS S32750 | 550 min. | 795 min. | 15 min. | 310 max. |
| UNS S32760 | 550 min. | 750 min. | 25 min. | 270 max. |
At Elvis Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Super Duplex Steel Fasteners in Texas, USA, providing cutting-edge solutions for all your piping needs. Our state-of-the-art production plants are strategically located in the USA, allowing us to maintain a vast inventory of over 16,000 tons of premium-quality materials readily available in stock. We are dedicated to delivering superior products and services, ensuring reliability and excellence for our global clientele.
Contact us to get a quick quote for your requirement.
Super Duplex Steel Fasteners find extensive use in offshore oil and gas platforms, marine applications, chemical processing units, desalination plants, and power generation systems. They are perfect for securing components in systems that face chloride-rich, acidic, and high-pressure conditions. Common applications include heat exchangers, valves, pumps, pressure vessels, and flange connections. Their superior mechanical strength and corrosion resistance guarantee long-lasting, maintenance-free performance in subsea systems, pipeline installations, and industrial processing facilities. With excellent fatigue resistance and dimensional stability, they are the preferred choice for demanding applications.
