ASTM A790 UNS S32205 ERW Pipes

ASTM A790 UNS S32205 ERW Pipes

ASTM A790 UNS S32205 ERW Pipes are duplex stainless steel welded pipes designed for high strength and superior corrosion resistance in aggressive environments. With a balanced ferritic-austenitic microstructure, UNS S32205 offers excellent resistance to pitting, crevice corrosion, and chloride stress corrosion cracking.

Duplex S32205 (commonly known as Duplex 2205) provides nearly double the yield strength of conventional stainless steels like 304 and 316, making it ideal for high-pressure and heavy-duty industrial applications while reducing overall material weight.

Specifications

Standard	ASTM A790 / ASME SA790
Grade	UNS S32205 (Duplex 2205)
Manufacturing Process	Electric Resistance Welded (ERW)
Size Range	1/2" NB to 24" NB
Wall Thickness	Schedule 5S to Schedule 80S
Length	6 Meters Standard / Custom Length
Surface Finish	Annealed & Pickled, Polished, Matte Finish
End Type	Plain End, Beveled End, Threaded

Key Benefits

• High Mechanical Strength: Nearly twice the yield strength of austenitic grades.
• Excellent Corrosion Resistance: Superior performance in chloride and marine environments.
• Stress Corrosion Crack Resistance: Ideal for offshore and chemical industries.
• Improved Cost Efficiency: Higher strength allows thinner wall construction.
• Long Service Life: Reduced maintenance and enhanced operational reliability.

Chemical Composition (Typical)

Element	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

• Oil & Gas Processing Plants
• Offshore Structures
• Heat Exchangers
• Chemical Processing Equipment
• Marine and Shipbuilding Industry
• Desalination Systems

Quality Testing

• Hydrostatic Testing
• Ultrasonic Testing (UT)
• Eddy Current Testing
• PMI Testing
• Dimensional Inspection

Conclusion

ASTM A790 UNS S32205 ERW Pipes deliver an exceptional combination of strength, corrosion resistance, and durability. These duplex stainless steel pipes are the preferred solution for demanding environments where reliability, safety, and long-term performance are critical.