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Situated in the thriving industrial centre of Kolkata, Rinku Fasteners is a trusted manufacturer and supplier known for delivering high-quality Duplex Steel S31803 Stud Bolts. Serving clients across India, the company blends engineering expertise with a warm, customer-focused approach. Each stud bolt is crafted with precision, offering exceptional strength, corrosion resistance, and long-term reliability in demanding environments. Rinku Fasteners takes pride in understanding real project challenges and providing dependable fastening solutions. Their Duplex Steel S31803 Stud Bolts reflect consistent craftsmanship, durability, and a genuine commitment to helping industries achieve safe, stable, and efficient operations.
Duplex Steel S31803 Stud Bolts are made from a dual-phase austenitic–ferritic stainless steel alloy containing chromium, nickel, molybdenum, and nitrogen. This composition delivers excellent resistance to pitting, crevice corrosion, and stress corrosion cracking, especially in chloride-rich environments. Mechanically, these stud bolts exhibit high tensile and yield strength, strong fatigue resistance, and stability under elevated pressure and temperature. Their dual-phase structure enhances toughness and minimizes distortion under heavy loads. This blend of corrosion resistance, strength, and durability makes Duplex Steel S31803 Stud Bolts ideal for high-performance industrial applications.
| S31803 | C | N | P | Si | Mn | Mo | Fe | Cr | S | Ni |
| 1.0 | 0.03 | 0.02 | 2.0 | 3.0 – 3.5 | 22.0 – 23.0 | 0.03 | 4.5 – 6.5 | 0.14 – 0.2 | Bal |
| S31803 | Density | Melting Point | Yield Strength (0.2%Offset) | Tensile Strength | Elongation |
| 7.8 g/cm3 | 1350 °C (2460 °F) | Psi – 80000 , MPa – 550 | Psi – 116000 , MPa – 800 | 15 % |
| Grade | Duplex Steel UNS S31803 / S31803 |
| Specifications | ASTM A 479 ASME SA 479 |
| Dimension | DIN, ASTM, BS and all International Standards |
| Length | 3mm to 200mm |
| Size | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Types | Threaded Rod, Class A double ended stud, Tie Rod, Double Ended Stud, Stud Bolts, Bronze Hex Studs, Threaded Studs etc |
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 Stud Bolts are widely used in industries that require strong, corrosion-resistant fastening components capable of performing reliably in harsh and aggressive conditions. They are commonly found in offshore platforms, marine environments, desalination facilities, and chemical processing plants due to their superior resistance to chlorides and chemical attack. Their high strength makes them suitable for pressure vessels, heat exchangers, pumps, and valve assemblies. These stud bolts are also valued in the oil and gas sector, pulp and paper mills, and structural systems exposed to heavy mechanical stress. Engineers rely on Duplex Steel S31803 Stud Bolts for secure, long-lasting connections in critical applications.
At Rinku Fasteners, Duplex Steel Stud Bolts S31803 are meticulously packaged to ensure safe and secure delivery. Each bolt is individually inspected and wrapped in protective material to prevent damage during transit. We use durable, high-quality packaging materials that safeguard against environmental factors such as moisture and impact. The bolts are organized in sturdy, labeled cartons for easy identification and handling. Our packaging process guarantees that your Duplex Steel Stud Bolts S31803 arrive in pristine 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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