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Neesham Flanges is a trusted manufacturer and supplier of high-performance Super Duplex Screws in Hamilton, New Zealand, delivering reliable fastening solutions for demanding industrial environments. With a strong focus on quality and precision, the company produces screws known for exceptional strength, durability, and corrosion resistance. Using advanced manufacturing techniques, Neesham Flanges ensures each product meets international standards and performs efficiently in harsh conditions. Super Duplex Screws from the company are widely used in applications involving high pressure, seawater exposure, and chemically aggressive environments, making Neesham Flanges a preferred partner for dependable, long-lasting fastening components.
Super Duplex Screws are typically produced from grades such as UNS S32750 or S32760, featuring high chromium, molybdenum, and nitrogen content. Their austenitic-ferritic microstructure provides enhanced strength and toughness compared to conventional stainless steels. These screws offer excellent resistance to pitting, crevice corrosion, and chloride stress-corrosion cracking. They also exhibit high tensile and yield strength, good ductility, and outstanding fatigue resistance. This combination of properties makes Super Duplex Screws ideal for long-term performance in harsh industrial, marine, and chemical processing environments.
| 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 Screws are used in various high performance areas. In chemical processing they are able to resist the effects of aggressive chemicals and high pressure. In marine applications, they are protected from corrosion by sea water hence giving long service life. In the oil and gas industry, they offer secure fastening where tension is usually high. Also, Super Duplex Steel screws are employed in power generation and construction industries because of their excellent performance in harsh conditions.
Super Duplex Screws are widely utilized across industries that demand superior mechanical strength and corrosion resistance. They are commonly used in offshore platforms, subsea equipment, desalination plants, and marine engineering due to their resistance to seawater and chlorides. In chemical and petrochemical industries, these screws secure components exposed to high pressure and aggressive chemicals. They are also essential in heat exchangers, pulp and paper machinery, structural frameworks, and power generation systems. Their durability, stability, and ability to perform under extreme conditions make them ideal for critical fastening applications.
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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