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Jyoti Steels is a prominent producer and supplier of high-quality Duplex Steel Bolts, established in Mumbai, India. Known for precision engineering and reliability, we offer fastening solutions that excel in corrosive and high-stress environments. Our Duplex Bolts are designed to global standards and are utilized across various industries including marine, petrochemical, oil & gas, and construction. With advanced production technology and a rigorous quality assurance process, Jyoti Steels delivers consistent product performance, durability, and customer satisfaction in both domestic and global markets.
Duplex Steel Bolts usually consist of 21.0–23.0% Chromium, 4.5–6.5% Nickel, 2.5–3.5% Molybdenum, ≤2.0% Manganese, and 0.14–0.20% Nitrogen. The combination provides excellent resistance to pitting, crevice corrosion, and stress corrosion cracking. These bolts exhibit high mechanical strength with tensile strength in the order of 620 MPa and yield strength of 450 MPa with 25% elongation. They are physically very dense with density 7.8 g/cm³ and a melting point of between 1350°C and 1450°C. They have a duplex (ferritic-austenitic) microstructure with a combination of toughness, strength, and corrosion resistance, which is best suited for heavy industrial and marine environments.
| 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 Jyoti Steels, we take pride in being the largest supplier, exporter, and manufacturer of Duplex Steel Bolts in Mumbai, India, providing cutting-edge solutions for all your piping needs. Our state-of-the-art production plants are strategically located in the India, 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.
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Duplex Steel Bolts find extensive applications in industries where high strength and resistance to severe environments are necessary. Typical uses are in offshore oil platforms, subsea pipelines, chemical processing plants, and marine structures where resistance to chloride and seawater corrosion is a must. They are also used in pressure vessels, heat exchangers, flanges, and structural assemblies in the power, desalination, and pulp & paper industries. Their resistance to thermal and mechanical stress makes them suitable for infrastructure subjected to varying temperatures and harsh media. Moreover, their high weldability and extended service life minimize maintenance costs in mission-critical installations.
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