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Marsh Nickel Alloys is a leading manufacturer and supplier of super duplex steel fasteners in Canberra, Australia. Our super duplex steel fasteners are engineered to deliver exceptional strength, durability and excellent resistance to corrosion, making them ideal for the toughest environments. Focusing on high quality materials and precision technology, our fasteners are perfect for applications in the oil, gas, marine and chemical sectors AtMarsh Nickel Alloys, we are dedicated to meeting the highest industry standards role and provide reliable solutions to our customers. Our extensive experience and advanced manufacturing capabilities ensure that our super duplex steel fasteners deliver outstanding performance and longevity, positioning us as the preferred choice for customers in Canberra and beyond.
| 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. |
Super Duplex Steel fasteners boast a remarkable blend of **high mechanical strength** and **exceptional corrosion resistance**, thanks to their unique dual-phase (austenitic-ferritic) structure. These fasteners excel in resisting **chloride stress corrosion cracking, pitting, and crevice corrosion**, particularly in saltwater and harsh chemical environments. With a yield strength that surpasses standard austenitic stainless steels, Super Duplex fasteners ensure secure and stable connections, even in high-pressure and high-stress situations.
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The fasteners from Marsh Nickel Alloys—including **bolts, nuts, washers, screws, studs, and threaded rods**—are extensively used in **subsea equipment**, **pressure vessels**, **desalination plants**, **structural frameworks**, and **pipeline systems**. Engineered for precision fit and strength, these fasteners play a crucial role in preventing failures during mission-critical operations. Whether for large-scale infrastructure projects or intricate assemblies, Marsh Nickel Alloys delivers high-performance Super Duplex Steel fasteners that are trusted across Canberra’s most demanding industrial sectors.
