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Mazin Fasteners is a trusted manufacturer and supplier of Duplex Steel Fasteners S31803, located in Muscat, Oman. They specialize in providing high-performance fastening solutions designed for tough, corrosive, and high-load industrial settings. The company follows strict quality control measures and adheres to international standards to guarantee consistent reliability and performance. With state-of-the-art manufacturing facilities and a skilled technical team, Mazin Fasteners is known for delivering duplex fasteners that boast exceptional strength and corrosion resistance. Their commitment to material traceability, precision engineering, and timely delivery makes them a go-to partner for the oil & gas, marine, offshore, and petrochemical sectors.
Duplex Steel S31803 Fasteners are crafted from a unique duplex stainless steel alloy that features a well-balanced austenitic-ferritic microstructure. Typically, the composition includes around 22% chromium, 5% nickel, 3% molybdenum, and a controlled amount of nitrogen. This blend results in impressive yield and tensile strength—almost double that of standard austenitic stainless steels—while also providing outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking. These fasteners are known for their toughness, dimensional stability, and dependable performance even under high pressure and temperature conditions.
| 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 find their place in a variety of applications that demand high strength and excellent corrosion resistance. You’ll commonly see them in oil and gas pipelines, offshore platforms, petrochemical plants, refineries, marine structures, and desalination facilities. They are also widely used in pressure vessels, heat exchangers, valves, pumps, and structural assemblies that are exposed to harsh, chloride-rich environments. These fasteners are reliable performers, even in high-pressure situations and fluctuating temperatures, making them ideal for corrosive service conditions.
At Mazin 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.
Mazin Fasteners is a leading manufacturer and supplier of high-quality fasteners in Muscat, OMAN, with over 8 years of experience serving global industries.
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