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Duplex Stainless Steel Pipe is the most common duplex product we supply, we can also deliver Duplex 2304 and Duplex 2207 with reduced lead times as these alloys are stocked. Alloy(UNS S32305/S31803) is a 22% chromium, 3% molybdenum, 5-6% nickel, nitrogen alloyed duplex stainless steel pipe with high general, localized, and stress corrosion resistance properties in addition to high strength and excellent impact toughness.

Alloy S32205 provides pitting and crevice corrosion resistance superior to 316L or 317L austenitic stainless steel tube in almost all corrosive media. It also has high corrosion and erosion fatigue properties as well as lower thermal expansion and higher thermal conductivity than austenitic.

Standard: ASTM/ASME A789/SA789, A790/SA790

Steel Grade: UNS S32750,  S31803, S32205, S32304, S32101 S32760 etc.

Applications:

Duplex pipes are stainless pipes containing the high amount of chromium and minimum amount of nickel. Duplex pipes provide great strength and resistance to corrosive environments. Duplex pipes are used in desalination plants, heat exchangers, and marine processes.

• Duplex stainless steel has below capability:
• High intensity and good impact toughness
• It can bear stress corrosion well
• Good ability to avoid patch and crack
• Low heat expand modulus and better heat transmit
• High pressure work
• Weldable