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Located in the thriving industrial hub of Kolkata, Rinku Fasteners is a trusted manufacturer and supplier of high-performance Duplex Steel S31803 Fasteners. Serving customers across India, the company combines strong technical expertise with a warm, customer-focused approach. Each fastener is crafted with precision to deliver exceptional strength, corrosion resistance, and dependable performance in demanding environments. Rinku Fasteners takes pride in understanding real project challenges and offering reliable solutions that support long-term operations. Their Duplex Steel S31803 Fasteners reflect consistent craftsmanship, durability, and a genuine commitment to providing high-quality fastening systems for modern industries.
| 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 that require strong, corrosion-resistant fastening solutions capable of performing reliably in harsh conditions. They are commonly applied in offshore platforms, marine engineering, desalination plants, and chemical processing systems due to their exceptional resistance to chlorides and aggressive chemicals. Their high strength makes them ideal for pumps, valves, heat exchangers, and pressure vessels. These fasteners are also utilized in the oil and gas sector, pulp and paper mills, and structural components exposed to heavy stress or fluctuating temperatures. Engineers rely on Duplex Steel S31803 Fasteners for secure, long-lasting connections in demanding industrial environments.
At Rinku 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.
Rinku Fasteners is a leading manufacturer and supplier of high-quality fasteners in Kolkata, India, with over 8 years of experience serving global industries.
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