ASTM A790 UNS S32205 Duplex 2205 Stainless Steel Seamless Pipe

Duplex 2205 stainless steel seamless pipes are manufactured with a balanced austenitic and ferritic microstructure, offering high strength, excellent corrosion resistance and superior resistance to stress corrosion cracking. Compared with conventional austenitic stainless steels, 2205 duplex stainless steel provides enhanced performance in chloride-containing, high-pressure and highly corrosive environments. It is widely used in oil & gas, offshore engineering, chemical processing, pressure vessels, heat exchangers and energy industries.

Key Features

• High yield strength for high-pressure and heavy-duty applications.
• Excellent resistance to chloride, seawater and corrosive media.
• Superior resistance to stress corrosion cracking in harsh environments.
• Excellent resistance to pitting and crevice corrosion.
• Reliable performance for oil, chemical and offshore applications.

Typical Applications

• Used for pipelines, downhole equipment and high-pressure piping systems.
• Applied in offshore platforms, seawater systems and marine equipment.
• Used for corrosive media transport, reactors and pressure vessels.
• Applied in heat exchangers, power equipment and LNG facilities.
• Used in seawater-resistant piping and desalination systems.

Chemical Composition (wt%)

Mechanical Properties (Solution Annealed + Water Quenched)

Precautions

• Prolonged exposure to high temperatures may cause embrittlement and reduce performance.
• Avoid contact with carbon steel to prevent surface contamination.
• Proper solution annealing is required to ensure corrosion resistance and mechanical properties.
• Keep surfaces clean and dry, avoiding impact and mechanical damage.
• Ensure compatibility with service media, temperature and pressure conditions before application.

Quality Assurance

All DINGSCO Duplex 2205 (UNS S32205) ASTM A790 duplex stainless steel seamless pipes undergo rigorous inspections, including PT (ASTM E165), tensile testing (ASTM E8/E8M), OES chemical composition analysis, hardness testing (ASTM E18), ultrasonic testing, eddy current testing and dimensional verification. Full material traceability is maintained throughout the entire production process from raw material to finished pipes. MTRs, heat treatment records and NDT reports can be provided upon request.

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