Home > Duplex Steel > Duplex Steel Stud Bolts
Santner Nickel Alloys is a well-respected manufacturer and supplier of Duplex Steel Stud Bolts based in Hamilton, New Zealand. They specialize in providing top-notch fastening solutions tailored for demanding industrial applications. These stud bolts are designed with exceptional strength, durability, and resistance to corrosion, making them perfect for critical operations in tough environments. Santner Nickel Alloys follows strict quality control measures and international standards to guarantee reliable performance. Commonly found in industries like chemical processing, oil and gas, marine, and power generation, Duplex Steel Stud Bolts deliver remarkable mechanical and chemical resilience, ensuring secure and long-lasting connections even under high pressure, stress, and corrosive conditions.
Duplex Steel Stud Bolts are made up of about 22% chromium, 5–6% nickel, and 3% molybdenum, with the rest being iron and trace amounts of nitrogen. Their unique dual-phase microstructure, which combines ferritic and austenitic phases, gives them excellent tensile strength, high yield strength, and outstanding toughness. These bolts are particularly resistant to pitting, crevice corrosion, and stress corrosion cracking, especially in environments rich in chlorides. They also boast impressive fatigue resistance, ductility, and thermal stability. This blend of mechanical and chemical properties ensures that Duplex Steel Stud Bolts maintain their structural integrity and reliable performance, even in extreme temperatures, pressures, and corrosive conditions.
| 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 Santner Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Duplex Steel Stud Bolts in Hamilton, New Zealand, providing cutting-edge solutions for all your piping needs. Our state-of-the-art production plants are strategically located in the New Zealand, 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 extensive use in industries that demand high-strength, corrosion-resistant fasteners. In the oil and gas sector, they are crucial for pipelines, pressure vessels, and offshore platforms that face exposure to seawater and harsh chemicals. The chemical and petrochemical industries rely on them for reactors, heat exchangers, and process piping systems that handle corrosive materials. In marine applications, they play a vital role in shipbuilding, ensuring durability and reliability in challenging conditions.