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At Hazlewood Fasteners, we specialize in manufacturing and supplying Super Duplex Steel Stud Bolts across Canberra, Australia, for industries that demand strength and corrosion resistance in extreme conditions. Our bolts are crafted with precision from high-quality super duplex stainless steel, offering outstanding performance in aggressive and high-pressure environments. Designed for longevity and reliability, they are ideal for applications in oil & gas, chemical processing, and marine sectors. Each bolt is carefully inspected and tested to meet global quality standards, ensuring that our clients receive fastening solutions built to last and perform under the toughest challenges..
Super Duplex Steel Stud Bolts are made from a balanced microstructure of austenite and ferrite, typically containing chromium (25%), nickel (7%), molybdenum (4%), and nitrogen. This composition provides superior resistance to pitting, crevice corrosion, and stress cracking. They possess a tensile strength of around 800–900 MPa and yield strength up to 550 MPa, offering twice the strength of standard stainless steels. These bolts also feature excellent toughness, weldability, and fatigue resistance, maintaining mechanical integrity even under extreme temperature and pressure variations in demanding industrial 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 Stud Bolts are widely used where high mechanical strength and corrosion resistance are essential. They are ideal for oil and gas refineries, offshore drilling platforms, chemical processing plants, and desalination units. In marine environments, they withstand seawater exposure and prevent corrosion-related failures. The bolts are also used in heat exchangers, pressure vessels, pumps, and pipeline systems operating under extreme conditions. Their ability to resist cracking and oxidation makes them a top choice for industries seeking long-lasting and dependable fastening solutions in both onshore and offshore engineering applications.
At Hazlewood Fasteners, we make sure that our Super Duplex Steel stud bolts are packed in the most appropriate manner. Every stud bolt is covered with protective materials to avoid scratching, rusting, and contamination of the bolt during transportation. We use durable cartons and provide custom packaging to suit your needs and preferences in the best way possible. Clear labeling and packing also help in identification and handling of the products, which is a proof of our high quality products in good condition.
Hazlewood Fasteners is a leading manufacturer and supplier of high-quality fasteners in Canberra, Australia, with over 8 years of experience serving global industries.
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