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Lina Fasteners is a reputable manufacturer and supplier based in Tunis, Tunisia, specializing in high-performance Duplex Steel Fasteners S31803 designed for tough industrial applications. These fasteners are crafted to meet international standards, blending the advantages of austenitic and ferritic stainless steel to provide remarkable strength, corrosion resistance, and durability. At Lina Fasteners, you’ll find bolts, nuts, studs, and washers that boast precise dimensions and reliable mechanical properties. Commonly used in sectors like oil & gas, petrochemical, chemical processing, marine, and power generation, Duplex Steel Fasteners S31803 ensure dependable fastening solutions, a long service life, and consistent performance even in the most challenging environments.
Duplex Steel Fasteners S31803 are crafted from a well-balanced blend of austenitic and ferritic stainless steel, enriched with high levels of chromium, molybdenum, and nitrogen. This unique composition results in impressive tensile and yield strength, exceptional toughness, and resistance to fatigue. S31803 fasteners are particularly resistant to pitting, crevice corrosion, and stress corrosion cracking, especially in environments rich in chlorides. They maintain their shape under load, endure thermal cycling, and provide reliable performance under mechanical stress, making them perfect for demanding and corrosive industrial settings.
| 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 find extensive use in industries that require robust and corrosion-resistant fastening solutions. You’ll often see them in applications like chemical processing equipment, offshore platforms, oil & gas pipelines, pressure vessels, heat exchangers, and marine structures. They are also widely utilized in desalination plants, the pulp and paper industry, and power generation facilities.
At Lina 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.
Lina Fasteners is a leading manufacturer and supplier of high-quality fasteners in Tunis, Tunisia, with over 8 years of experience serving global industries.
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