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Duplex Steel Fasteners S31803 are robust, corrosion-resistant fasteners designed for tough industrial, marine, and chemical settings. Crafted from Duplex 2205 (S31803) stainless steel, these fasteners blend the strength of ferritic steel with the corrosion resistance of austenitic steel, ensuring top-notch mechanical performance and lasting durability. Suppliers in Hamilton, New Zealand, like Aria Fasteners, guarantee precise threading, consistent dimensions, and strict compliance with international standards. These fasteners are perfect for securing flanges, pipelines, pressure vessels, and machinery in situations that demand both high tensile strength and exceptional resistance to chloride-induced corrosion.
Made up of iron, chromium, nickel, and molybdenum, Duplex Steel Fasteners S31803 offer outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking. They boast high tensile and yield strength, excellent fatigue resistance, and stability under heavy loads and high temperatures. Their unique duplex microstructure strikes a balance between strength and ductility, preventing deformation and corrosion even in harsh conditions. These fasteners are well-suited for chemical, petrochemical, offshore, and marine applications, where traditional stainless steels might struggle due to chloride exposure or intense mechanical stress.
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Fe |
| Duplex Steel S31803 | 0.030 max | 1.20 max | 0.80 max | 0.035 max | 0.020 max | 24.00 – 26.00 | 3.00 – 5.00 | 6.00 – 8.00 | 0.24 – 0.32 | 58.095 min |
| Element | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| Duplex Steel S31803 | 7.9 g/cm3 | 1402 °C (2555 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 40 % |
Standard : DIN, ASTM, BS and all International Standards
Size : 3 mm to 200 mm
Bolt / Screw Size : M3 – M56 | 3/6″ to 2″ | Custom Sizes
Nuts Size : M3 – M56 | 3/6″ to 2″ | Custom Sizes
Washers Size : M1 – M64 | #4 to 3″ | Custom Sizes
Length : M02 to M33
Types : Nuts, Bolts, Screws, Sockets, Studs, Screw, Hex Set Screw, Socket Screw, Cap Screw, Pan Head Screw, Machine Screw, Socket Head Cap Screw, Allen Cap screw, Wing Screw
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 Fasteners S31803 are widely used in various industries due to their excellent strength and corrosion resistance. They are ideal for applications in the chemical and petrochemical industries, oil and gas exploration, marine environments, and power generation. These fasteners are essential in construction projects, particularly in offshore platforms, heat exchangers, and pressure vessels. Their reliability and durability make them a preferred choice for critical applications requiring long-term performance under harsh conditions.
You’ll find Duplex Steel Fasteners S31803 commonly used in chemical processing plants, offshore platforms, desalination systems, power generation facilities, and marine installations. They excel at securing flanges, pressure vessels, heat exchangers, pipelines, and industrial machinery that face aggressive chemicals or high-pressure situations. These fasteners ensure joint integrity, prevent loosening, and deliver long-term reliability in demanding environments. Plus, they’re also utilized in heavy industrial applications, showcasing their versatility and strength.
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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