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Mira Fasteners, a trusted name in Kuala Lumpur, Malaysia, is a leading manufacturer and supplier of Duplex Steel S31803 Fasteners, known for their superior mechanical strength and corrosion resistance. Engineered to withstand demanding environments, these fasteners offer an excellent combination of ferritic and austenitic stainless steel properties, making them highly reliable in aggressive industrial conditions. Duplex S31803 fasteners are widely used in industries where high strength, stress corrosion resistance, and long-term performance are critical. Mira Fasteners ensures precision manufacturing, adherence to international standards, and prompt delivery throughout Malaysia and Southeast Asia to meet diverse industrial fastening needs.
Duplex Steel S31803 Fasteners have a balanced chemical composition of Chromium (21–23%), Nickel (4.5–6.5%), Molybdenum (2.5–3.5%), and Nitrogen (0.08–0.20%), with Iron as the base element. These fasteners exhibit tensile strength between 620–880 MPa, yield strength of ≥450 MPa, and elongation of 25%, offering twice the strength of standard austenitic grades. With superior resistance to pitting, crevice corrosion, and stress corrosion cracking, Duplex S31803 fasteners are ideal for high-pressure, corrosive environments and maintain structural integrity under mechanical and thermal 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 S31803 Fasteners are widely used in industries such as oil & gas, petrochemical, marine, power generation, chemical processing, and pulp & paper. Their excellent strength and corrosion resistance make them ideal for use in pressure vessels, heat exchangers, desalination plants, offshore platforms, and pipelines. These fasteners perform exceptionally in chloride-rich and acidic environments, where standard stainless steels fail. Mira Fasteners offers these fasteners in a variety of sizes and specifications to meet the stringent requirements of critical applications across Malaysia and other Southeast Asian industrial hubs.
At Mira Fasteners, we ensure that our Duplex Steel Fasteners S31803 are meticulously packaged to guarantee their integrity and quality upon delivery. Each fastener is carefully inspected and securely packed using high-quality materials to prevent damage during transit. Our packaging process includes labeling with detailed product information for easy identification. Whether you need bulk packaging or customized solutions, we prioritize your requirements, ensuring that your fasteners arrive in perfect condition, ready for immediate use.
Mira Fasteners is a leading manufacturer and supplier of high-quality fasteners in Kuala lumpur, Malaysia, with over 8 years of experience serving global industries.
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