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Duplex Steel Nuts S31803 are robust, corrosion-resistant fasteners crafted for demanding industrial, chemical, and marine settings. Made from grade S31803 duplex stainless steel, these nuts deliver outstanding mechanical performance and exceptional resistance to pitting, stress corrosion cracking, and chloride-induced corrosion. Suppliers in Hamilton, New Zealand, like Aria Fasteners, guarantee precise threading, uniform dimensions, and consistent quality. These nuts are perfect for pairing with bolts and studs in pressure vessels, pipelines, structural frameworks, and machinery, ensuring secure fastening and long-lasting durability even in the harshest environments.
These nuts are made up of roughly equal parts austenite and ferrite, featuring a chemical makeup that includes iron, chromium, nickel, and molybdenum. This unique microstructure provides high tensile strength, toughness, and excellent corrosion resistance in both oxidizing and reducing conditions. Mechanically, they maintain their shape under heavy clamping forces and resist deformation, ensuring reliable performance in high-pressure, high-temperature, and chemically aggressive situations. Their blend of chemical resistance and mechanical durability makes them ideal for industrial, marine, and offshore applications where long-term reliability is essential.
| S31803 | Density | Melting Point | Yield Strength (0.2%Offset) | Tensile Strength | Elongation |
| 7.8 g/cm3 | 1350 °C (2460 °F) | Psi – 80000 , MPa – 550 | Psi – 116000 , MPa – 800 | 15 % |
| S31803 | C | N | P | Si | Mn | Mo | Fe | Cr | S | Ni |
| 1.0 | 0.03 | 0.02 | 2.0 | 3.0 – 3.5 | 22.0 – 23.0 | 0.03 | 4.5 – 6.5 | 0.14 – 0.2 | Bal |
| Specifications | ASTM A479 / ASME SA479 |
| Standards | DIN, ASTM, BS and all International Standards |
| Length | 3 mm to 200 mm |
| Size | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Type | Hex Head Bolts, Square Bolts, U bolts, Eyebolts, T bolt, Hex Bolt, Lag Bolts, Countersunk Bolts, Hex Head nuts, Square nuts, Locknuts, Eye nuts, wing nuts, T nuts, Panel Nuts, Coupling Nuts, Dome nuts, Acorn Nuts |
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 Nuts S31803 are widely used in various demanding industries due to their high strength and corrosion resistance. Common applications include oil and gas exploration, chemical processing, and marine environments, where durability under harsh conditions is essential. They are also utilized in construction, aerospace, and power generation sectors, particularly in structures and machinery exposed to extreme stress and corrosive elements. Their robust performance ensures long-term reliability and minimal maintenance in critical applications.
Duplex Steel Nuts S31803 find their place in offshore oil and gas platforms, chemical processing plants, desalination facilities, and marine structures. They excel at securing flanges, pressure vessels, piping systems, heat exchangers, and heavy machinery that face corrosive or high-stress conditions. These nuts ensure secure fastening, maintain joint integrity, and prevent loosening or corrosion over time. Additionally, Duplex Steel Nuts S31803 are utilized in industrial manufacturing, renewable energy projects, and more, showcasing their versatility and reliability in various 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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