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Hazlewood Fasteners, based in Canberra, Australia, is a distinguished manufacturer and supplier of super duplex steel fasteners, engineered for environments where conventional materials fail. These fasteners combine extraordinary strength with unparalleled corrosion resistance, making them indispensable in aggressive industrial and marine applications. Each component reflects Hazlewood’s commitment to precision engineering, quality, and durability. Designed to withstand high stress, pressure, and corrosive media, these fasteners exemplify reliability and performance. Serving offshore, chemical, petrochemical, and energy sectors, Hazlewood Fasteners delivers solutions that endure the harshest conditions, offering longevity, structural integrity, and peace of mind for critical installations.
Hazlewood’s super duplex steel fasteners are crafted from an advanced alloy containing roughly 25% chromium, 7% nickel, 3.6% molybdenum, and 0.2–0.3% nitrogen. This composition imparts exceptional tensile strength (up to 850 MPa) and superior fatigue resistance while providing remarkable resistance to pitting, crevice, and stress corrosion cracking. The dual-phase microstructure ensures high hardness without sacrificing toughness, maintaining mechanical integrity under extreme pressure and temperature variations. Chemically resistant and dimensionally stable, these fasteners deliver dependable performance even in chloride-rich or highly aggressive industrial environments.
| 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 % |
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.
Hazlewood super duplex steel fasteners are essential in industries demanding the highest corrosion resistance and mechanical performance. In offshore oil and gas, they secure subsea structures, pipelines, and platforms exposed to harsh saline conditions. Chemical and petrochemical facilities employ them in reactors, heat exchangers, and storage tanks resistant to acids and chlorides. Power generation, desalination plants, and marine engineering applications leverage their combination of strength and corrosion immunity for long-term reliability. Wherever aggressive environments and extreme mechanical stresses intersect, Hazlewood’s super duplex steel fasteners provide enduring structural integrity, safety, and operational excellence, ensuring assemblies perform flawlessly over decades.
We understand the importance of safe packaging of our Super Dupex Steel fasteners hence we ensure that they get to you in the best condition. Every fastener is covered with protective materials to ensure that they do not get damaged, rust or get contaminated in the course of transportation. We utilize sturdy cartons and we can also provide you with personalized packaging depending on your needs. Clear labeling and proper packing make it easier to identify and handle the products, thus proving our point that we value the quality of our products and the manner in which they are handled.
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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