Home > Duplex Steel > Duplex Steel Stud Bolts
Bilal Nickel Alloys, headquartered in Safat, Kuwait, is a trusted manufacturer and supplier of Duplex Steel Stud Bolts, designed for exceptional strength, durability, and corrosion resistance. These bolts are engineered for demanding industrial environments, providing reliable and secure fastening in high-pressure, marine, and chemically aggressive applications. Leveraging extensive expertise in duplex stainless steels, Bilal Nickel Alloys ensures that every stud bolt meets stringent quality standards, combining mechanical performance with long-term reliability. Their commitment to precision engineering and customer satisfaction makes these stud bolts a preferred choice for industries requiring robust, corrosion-resistant, and high-strength fastening solutions.
Duplex Steel Stud Bolts are composed of iron, chromium (~22%), nickel (~5–6%), molybdenum (~3%), and nitrogen, providing a balanced duplex microstructure. This composition delivers excellent resistance to pitting, crevice corrosion, and stress corrosion cracking, while offering high tensile strength, hardness, and ductility. Mechanically, duplex stud bolts outperform standard austenitic stainless steels in high-pressure and high-temperature applications. Their stable microstructure ensures long-term mechanical reliability, dimensional stability, and corrosion resistance, making them ideal for critical industrial operations where both structural integrity and chemical durability are essential.
| 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 Bilal Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Duplex Steel Stud Bolts in Safat, Kuwait, providing cutting-edge solutions for all your piping needs. Our state-of-the-art production plants are strategically located in the Kuwait, 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 are widely used in chemical processing, petrochemical, oil and gas, marine, and offshore industries, where both mechanical strength and corrosion resistance are vital. They are ideal for fastening components in piping systems, reactors, pressure vessels, structural assemblies, and industrial machinery exposed to seawater, chlorides, and harsh chemicals. These bolts are also employed in power generation, desalination plants, and specialized industrial equipment, providing secure, leak-free, and durable connections. Engineers rely on duplex steel stud bolts whenever structural integrity, long-term reliability, and chemical resistance are critical, making them indispensable for demanding industrial applications.
