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Fajar Metals, based in Jakarta, Indonesia, stands out as a top manufacturer and supplier of high-performance Duplex Steel Bolts, perfect for critical fastening needs. Known for their reliable and corrosion-resistant solutions, Fajar Metals caters to a variety of industries, including oil & gas, marine, petrochemical, construction, and power generation. Crafted from premium duplex stainless steel and meeting rigorous international standards, these bolts deliver outstanding strength, durability, and resistance to harsh environments. With a commitment to consistent quality, precise dimensions, and timely delivery, Fajar Metals has become a trusted partner for customers in search of robust, long-lasting bolt solutions for demanding industrial applications.
Duplex Steel Bolts are generally made from UNS S31803 or S32205 grades, containing 21–23% chromium, 4.5–6.5% nickel, 2.5–3.5% molybdenum, nitrogen, and iron. These bolts boast a unique dual-phase microstructure (austenitic and ferritic), which strikes a perfect balance between mechanical strength and corrosion resistance. They provide tensile strength ranging from 620–880 MPa and a yield strength of about 450 MPa, with an elongation exceeding 25%. Duplex bolts are highly resistant to pitting, crevice corrosion, and chloride stress corrosion cracking, making them ideal for fastening in chemically aggressive, high-pressure, and marine environments where standard fasteners might not hold up.
| Specifications | ASTM A479 & ASME SA479 |
| Standard | DIN, ASTM, BS and all International Standards |
| Length | 3 to 200 MM |
| Duplex Steel Nut and Bolts Size | M3 To M56 3/6″ to 2″ |
| Duplex Steel 2205 Machine Screws Size | M1.6 To M12 |
| Duplex Steel 2205 Washers Size | M3 To M56 3/6″ to 2″ |
| Duplex Steel 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 Fajar Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Duplex Steel Bolts in Jakarta, Indonesia, providing cutting-edge solutions for all your piping needs. Our state-of-the-art production plants are strategically located in the Indonesia, 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 Bolts find extensive use in industries where strength, durability, and corrosion resistance are crucial. In the oil & gas sector, they secure components in offshore platforms, refineries, and subsea systems. Chemical and petrochemical plants depend on them for process piping, pressure vessels, and reactor systems. In marine applications, they are essential for shipbuilding, seawater handling systems, and coastal infrastructure.