Ojas Pipes and Tubes, located in Kolkata, India, has earned a solid reputation as a reliable manufacturer and supplier of top-notch Super Duplex Steel Hollow Bars. These bars are celebrated for their remarkable mechanical strength and resistance to corrosion. Crafted to meet the rigorous standards of offshore, marine, and chemical industries, they ensure outstanding performance even in the harshest conditions. With state-of-the-art production facilities and a commitment to precision and metallurgical quality, Ojas provides premium hollow bar solutions designed for pressure-bearing and load-sensitive applications. The company takes pride in its timely deliveries, consistent quality, and unwavering dedication to customer satisfaction.
Super Duplex Steel Hollow Bars generally consist of 24–26% chromium, 6–8% nickel, 3–5% molybdenum, and 0.2–0.3% nitrogen, which grants them impressive resistance to chloride-induced corrosion and exceptional mechanical strength. These bars typically showcase a yield strength of about 550 MPa and tensile strength between 750–1000 MPa, along with remarkable impact and fatigue resistance. Their unique dual-phase (austenitic-ferritic) microstructure boosts durability and resistance to stress corrosion cracking. The hollow design offers an excellent strength-to-weight ratio, allowing for reduced material weight while ensuring structural integrity under pressure and load-bearing scenarios.
Specifications : ASTM A276, ASME SA276
Standard : ASTM, ASME
Size : 6 mm to 120 mm.
Length : 1 to 6 Meters, Custom Cut Lengths
Dimensions : EN, DIN, JIS, ASTM, BS, ASME, AISI
| Material | C | Mn | Si | P | S | Cr | Mo | Ni | N | Fe |
| Super Duplex Steel | 0.030 max | 1.20 max | 0.80 max | 0.035 max | 0.020 max | 24.00 – 26.00 | 3.00 – 5.00 | 6.00 – 8.00 | 0.24 – 0.32 | 58.095 min |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 7.8 g/cm3 | 1350 °C (2460 °F) | Psi – 80000 , MPa – 550 | Psi – 116000 , MPa – 800 | 15 % |
Yes, Super Duplex Steel Hollow Bars can withstand high temperatures due to their excellent strength and corrosion resistance. They are suitable for applications in environments up to around 300°C (572°F), depending on the specific alloy.
Super Duplex Steel Hollow Bars and Rods are manufactured through hot or cold working processes, including extrusion and forging, followed by heat treatment, cold drawing, and precision machining for enhanced strength and corrosion resistance.
Super Duplex Steel Hollow Bars have excellent natural corrosion resistance due to their high chromium and molybdenum content, making additional protective coatings generally unnecessary. However, in highly aggressive environments, coatings may offer extra protection.
Super Duplex Steel Hollow Bars find extensive use in offshore oil platforms, subsea equipment, chemical and petrochemical facilities, and marine settings due to their superior corrosion resistance and load-bearing capabilities. They are perfect for components like hydraulic cylinders, machined shafts, heat exchangers, pumps, and valve parts where high strength and lightweight design are essential. Their shape facilitates easier machining and more efficient material use. Industries operating in high-pressure, corrosive, or chloride-rich environments depend on these bars for durability and long-lasting performance.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Rupal Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Delhi, India
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