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Duplex Steel Coils are alloys composed of a balanced blend of austenitic and ferritic stainless steels, renowned for their superior strength and corrosion resistance. They find widespread use across various industries, including oil and gas, chemical processing, marine, and construction. These coils are employed in fabricating pipelines, pressure vessels, heat exchangers, and structural components, where durability and performance in harsh environments are paramount. Offering a cost-effective solution for demanding applications, duplex steel coils serve as reliable materials prized for their longevity and resilience.
| Grades | Density (g/cm 3) | Density (lb/in 3) | Melting Point (°C) | Melting Point (°F) |
| Duplex Steel Coils | 7.805 | 0.285 | 1420 – 1465 | 2588 – 2669 |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Fe |
| Duplex Steel Coils | 0.030 max | 2.00 max | 1.00 max | 0.030 max | 0.020 max | 21.0 – 23.0 | 2.50 – 3.50 | 4.50 – 6.50 | 0.8 – 0.20 | 63.54 min |
At PipingMart, we take pride in being the largest supplier and manufacturer in the UAE, offering cutting-edge solutions for all your piping needs. With state-of-the-art production plants strategically located in the UAE, we boast a vast inventory of over 25,000 tons of premium-quality materials readily available in stock.
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We offer These Duplex Steel Coils as per DIN, ISO, JIS or ANSI Standard.
Duplex Steel Coils applications are as diverse as the industries they serve driven primarily by the aerospace, railway, construction and automotive industries with petrochemical, nuclear, medical, Oil & Gas, Chemical, Pharmaceutical, Food & Beverage, Nuclear, Thermal Power plants, Paper and Pulp, marine and mining, etc.
Yes, Duplex Steel Coils can be welded using common welding techniques such as TIG (tungsten inert gas), MIG (metal inert gas), and SMAW (shielded metal arc welding). However, proper precautions must be taken due to their dual-phase microstructure. Pre-welding procedures like pre-heating and post-weld heat treatment may be necessary to prevent issues such as sensitization and embrittlement. It’s essential to use suitable filler metals and shielding gases to ensure the integrity and corrosion resistance of the weld joints. Following manufacturer recommendations and industry best practices is crucial to minimize the risk of weld-related defects and maintain the performance of duplex steel coil welds.
Duplex steel coils are suitable for a wide range of applications across industries such as oil and gas, chemical processing, marine, aerospace, construction, and more. They are commonly used in fabricating pipelines, pressure vessels, heat exchangers, structural components, and offshore platforms where corrosion resistance, high strength, and durability are essential. Due to their versatile properties, duplex steel coils excel in harsh environments containing corrosive chemicals, seawater, and high temperatures, making them ideal for critical applications requiring reliability and performance.
Recommended welding techniques for joining duplex steel coils include TIG (tungsten inert gas), MIG (metal inert gas), SMAW (shielded metal arc welding), SAW (submerged arc welding), laser welding, and electron beam welding. Each technique offers specific advantages depending on the thickness of the material, accessibility, and desired weld quality. Pre-welding and post-welding heat treatments may be necessary to prevent sensitization and maintain corrosion resistance. Selecting appropriate filler metals and shielding gases is crucial to ensure weld integrity and mechanical properties.
Yes, special considerations are needed for machining or fabricating duplex steel coils. Due to their dual-phase microstructure, duplex steels are tougher and have higher strength than conventional stainless steels. Machining operations should be performed at lower speeds, with heavier cuts, and sufficient coolant to minimize work hardening and tool wear. Carbide tooling is recommended. Additionally, post-machining treatments such as stress relieving may be necessary to restore material properties. Thorough cleaning before fabrication is essential to remove contaminants that could affect weld quality or corrosion resistance.
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