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Duplex Steel Screws are high-strength, corrosion-resistant fasteners engineered for demanding industrial, marine, and chemical applications. Made from duplex stainless steel—a combination of austenitic and ferritic microstructures—these screws offer exceptional mechanical performance along with excellent resistance to pitting, stress corrosion, and chloride attack. Suppliers in Hamilton, New Zealand, such as Aria Fasteners, provide screws with precise threading and consistent dimensions, ensuring reliable fastening in environments where conventional stainless steel or carbon steel fasteners may fail. Duplex Steel Screws are ideal for applications requiring long-term durability, high load-bearing capacity, and resistance to harsh conditions.
Duplex Steel Screws are composed of roughly equal parts austenite and ferrite, with a chemical composition that includes iron, chromium, nickel, and molybdenum. This unique structure provides a combination of high tensile strength, toughness, and excellent corrosion resistance. Mechanically, these screws maintain dimensional stability under heavy loads and resist deformation or fatigue in high-stress applications. Their corrosion resistance ensures they remain reliable even in chloride-rich, acidic, or marine environments, making them suitable for both structural and mechanical fastening where long-term performance is critical.
| Standard | : | ASTM A193, A194 / SA193 / SA194 |
| Dimension | : | ASTM, DIN, BS, GB, IS and all International Standards |
| Length | : | 3 mm to 200 mm |
| Bolts Size | : | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Screw Size | : | M02 to M33 | Custom Sizes |
| Heat Treatment | : | Annealing, Stress Relieving, Case Hardening, Quenching and Tempering. |
| Type | : | Hex Bolt/ Hex Screw, Square Head Bolt, U Bolt, Carriage Bolt, Eye Bolt, T Bolt/ J Bolt/ L bolt, Flange Bolt, Coach Screw etc. |
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.
Duplex steel screws are used in a variety of demanding applications, including chemical processing, marine environments, and oil and gas industries. Their high strength and corrosion resistance make them ideal for securing components in aggressive environments and high-pressure situations. They are commonly found in construction, power generation, and desalination plants, where durability and reliability are crucial. Duplex steel screws are also utilized in the aerospace industry for their ability to withstand extreme conditions and provide structural integrity.
Duplex Steel Screws are widely used in offshore platforms, chemical processing plants, desalination systems, and marine equipment. They are ideal for securing pipelines, machinery, pressure vessels, and structural frameworks exposed to corrosive environments or high-stress conditions. These screws are also employed in industrial manufacturing, renewable energy installations, and water treatment facilities where both strength and resistance to chemical or chloride attack are required. By providing secure fastening and long-lasting durability, Duplex Steel Screws ensure the safety, integrity, and performance of critical assemblies in aggressive and high-load 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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