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Themba Nickel Alloys, based in Cape Town, Cape Town, stands out as a top manufacturer and supplier of Duplex Steel Stud Bolts. These bolts are crafted for exceptional strength, durability, and corrosion resistance, making them perfect for tough industrial settings. Built to meet international standards, they excel in critical applications where mechanical reliability and resistance to harsh chemicals or chloride-rich environments are a must. Thanks to their unique duplex microstructure, which blends the best of ferritic and austenitic stainless steel, Themba Nickel Alloys’ Duplex Steel Stud Bolts offer remarkable tensile strength, toughness, and resistance to stress corrosion cracking, pitting, and crevice corrosion, making them ideal for the chemical, petrochemical, marine, and offshore sectors.
Duplex Steel Stud Bolts are made from a blend of iron, chromium, nickel, and molybdenum, with a touch of nitrogen. This special duplex microstructure gives them a tensile strength of around 690–850 MPa, a yield strength of 450–550 MPa, and an elongation of 20–25%. They boast excellent resistance to pitting, crevice corrosion, and stress corrosion cracking, especially in aggressive chemical and chloride-rich environments. These bolts maintain their mechanical stability even under high temperatures and pressures, while also being easy to machine and weld, ensuring they provide reliable and long-lasting fastening solutions for critical industrial applications.
| Grade | Duplex Steel UNS S31803 / S32205 |
| 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 |
| Duplex Steel Stud Bolts | 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 |
| Duplex Steel Stud Bolts | 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 % |
At Themban Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Duplex Steel Stud Bolts in Cape Town , South Africa, providing cutting-edge solutions for all your piping needs. Our state-of-the-art production plants are strategically located in the Cape Town, allowing us to maintain a vast inventory of over 16,000 tons of premium-quality materials readily available in stock. We are dedicated to delivering superior products and services, ensuring reliability and excellence for our global clientele.
Contact us to get a quick quote for your requirement.
Duplex Steel Stud Bolts find their place in various industries, including chemical processing, oil and gas, marine, and offshore sectors. They are perfect for securing flanges, pressure vessels, piping systems, heat exchangers, and structural components that face highly corrosive or chloride-laden environments. Their impressive combination of high strength, corrosion resistance, and durability makes them well-suited for high-pressure and high-temperature operations, especially in subsea and offshore installations.
