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Aria Fasteners, located in Hamilton, New Zealand, is a reputable manufacturer and supplier of top-notch Super Duplex Steel Nuts designed for critical applications in industries like marine, chemical, and industrial sectors. With a strong commitment to precision engineering and rigorous quality control, they meet international standards and cater to fields such as oil and gas, petrochemical, and offshore operations. Their Super Duplex Steel Nuts are renowned for their outstanding corrosion resistance, impressive mechanical strength, and long-lasting durability, even in the toughest environments. Thanks to their technical know-how, prompt delivery, and dedication to customer satisfaction, Aria Fasteners has earned a solid reputation as a go-to source for premium fastening solutions worldwide.
Super Duplex Steel Nuts are crafted from high-performance duplex stainless steel alloys, primarily S32760, which includes 25–26% chromium, 6–7% nickel, 3–4% molybdenum, nitrogen, and trace elements like manganese and iron. This unique blend gives them exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking, particularly in environments rich in chlorides and seawater. On the mechanical side, these nuts boast high tensile and yield strength, remarkable hardness, and the capability to handle heavy loads. Their perfect mix of corrosion resistance and mechanical strength makes them a top choice for critical applications where durability, stability, and chemical resistance are non-negotiable.
| Standard | DIN, ASTM, BS and all International Standards |
| Specifications | ASTM A479 & ASME SA479 |
| UNS S32760 Nut and Bolts Size | M3 To M56 3/6″ to 2″ |
| Length | 3 to 200 MM |
| Super Duplex Steel 2207 Machine Screws Size | M1.6 To M12 |
| Duplex Steel 2205 Washers Size | M3 To M56 3/6″ to 2″ |
| Tensile Strength(MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) | Hardness Rockwell C (HR C) | |
| Super Duplex Steel Bolts | 760 | 550 | 15 | 32 Max |
| 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 % |
To satisfy our clients needs by providing high quality products at competitive price as per the schedule and to maintain long term relationship with our clients.
Super Duplex Steel nuts are used in many critical applications. In chemical processing they are able to handle the effects of aggressive chemicals and high pressures. In marine applications, they are immune to the effects of sea water thus providing long service life. In the oil and gas industry, they offer secure fastening where high stress is exerted. Also, Super Duplex Steel nuts are applied in power generation and construction sectors due to their high performance in harsh conditions.
Super Duplex Steel Nuts find their place in various high-strength and corrosion-sensitive applications. You’ll often see them used in flanged joints, piping systems, pressure vessels, pumps, valves, and structural assemblies across offshore platforms, petrochemical plants, chemical processing units, and oil and gas facilities. Their ability to resist oxidation, pitting, and stress corrosion ensures they remain reliable over the long haul, even in harsh seawater and aggressive chemical environments.
Aria Fasteners is a leading manufacturer and supplier of high-quality fasteners in Hamilton, New Zealand, with over 8 years of experience serving global industries.
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