ASTM A790 UNS 32205 Seamless Pipes

ASTM A790 UNS 32205 Seamless Pipes

ASTM A790 UNS 32205 Seamless Pipes are duplex stainless steel pipes combining austenitic and ferritic microstructures for enhanced strength and corrosion resistance. Manufactured without welded joints, these pipes offer superior mechanical properties and reliability in high-pressure applications.

UNS S32205 (Duplex 2205) provides excellent resistance to pitting, crevice corrosion, and stress corrosion cracking in chloride-rich environments. It offers nearly double the yield strength of standard austenitic stainless steels.

Specifications

Standard	ASTM A790 / ASME SA790
Grade	UNS S32205
Manufacturing Process	Hot Rolled / Cold Drawn Seamless
Size Range	1/8" NB to 24" NB
Wall Thickness	Schedule 5S to Schedule XXS
Length	6 Meters Standard / Custom Length
Surface Finish	Annealed & Pickled, Polished, Bright Finish
End Type	Plain End, Beveled End, Threaded

Key Benefits

• High Strength: Nearly twice the yield strength of 300 series stainless steels.
• Excellent Corrosion Resistance: Superior resistance to pitting and crevice corrosion.
• Stress Corrosion Cracking Resistance: Performs well in chloride environments.
• Good Weldability: Suitable for various fabrication processes.
• Cost Efficiency: Higher strength allows reduced wall thickness in some applications.

Chemical Composition (Typical)

Element	UNS S32205 (%)
Carbon	0.03 Max
Chromium	22.0 – 23.0
Nickel	4.5 – 6.5
Molybdenum	3.0 – 3.5
Nitrogen	0.14 – 0.20

Applications

• Offshore Oil & Gas Platforms
• Chemical Processing Plants
• Marine and Shipbuilding Equipment
• Heat Exchangers
• Desalination Plants
• Pressure Vessels and Storage Tanks

Quality Testing

• Hydrostatic Testing
• Ultrasonic Testing (UT)
• Radiographic Testing (RT)
• PMI Testing
• Dimensional Inspection

Conclusion

ASTM A790 UNS 32205 Seamless Pipes deliver exceptional strength and corrosion resistance in demanding industrial and marine environments. Their duplex structure ensures long-term durability, reliability, and performance in critical piping systems.