Duplex Steel Tubes are high-performance stainless steel tubes known for their exceptional strength, superior corrosion resistance, and excellent resistance to stress corrosion cracking. These tubes combine the benefits of austenitic and ferritic stainless steels, making them ideal for demanding industrial and structural applications.
Duplex Steel Tubes are manufactured in seamless and welded forms and are widely used in heat exchangers, pressure vessels, chemical processing, marine, power generation, and offshore industries where high mechanical strength and corrosion resistance are critical.
Duplex Steel Tubes are available in standard duplex grades to meet various service conditions. The most commonly supplied grades include Duplex S31803 (UNS S31803) and Duplex S32205 (UNS S32205), offering excellent corrosion resistance, high strength, and long service life.
Duplex Steel Tube Manufacturer in India | Duplex S31803 & S32205 Tube Supplier
Applications of Duplex Steel Tubes
| ● Heat Exchangers & Condensers |
| ● Oil & Gas Industry and Offshore Platforms |
| ● Chemical & Petrochemical Processing Plants |
| ● Pressure Vessels & Boilers |
| ● Marine & Seawater Applications |
| ● Power Generation & Desalination Plants |
Specification Table of Duplex Steel Tube
| Standard | ASTM A789, ASTM A790, ASTM A928 |
|---|---|
| Outside Diameter | 6 mm to 114.3 mm (Custom sizes available) |
| Wall Thickness | 0.5 mm to 12 mm |
| Type | Seamless / Welded / EFW |
| Surface Finish | Pickled, Annealed, Polished, Bright Annealed |
| End | Plain End / Cut Length |
Duplex Steel Tube Grades (Sub-Products)
| ● Duplex S31803 – Excellent corrosion resistance and high mechanical strength, commonly used in heat exchangers and pressure equipment |
| ● Duplex S32205 – Enhanced resistance to pitting, crevice corrosion, and stress corrosion cracking for aggressive environments |
Mechanical Properties of Duplex Steel Tubes (Typical)
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation % |
|---|---|---|---|
| Duplex S31803 | 450 | 620 | 25 |
| Duplex S32205 | 450 | 620 | 25 |