ASME SA 789 UNS S32205 Duplex Stainless Steel, is characterized by their dual-phase microstructure, which consists of both austenitic (face-centered cubic) and ferritic (body-centered cubic) phases. Due to its excellent combination of properties, 1.4462 Duplex 2205 material is employed in a wide range of applications, including chemical processing, oil and gas exploration and production, heat exchangers, desalination plants, and various types of pressure vessels.
2205 Duplex Tubes Properties and Character
ASME SA 789 S32205 Duplex Stainless Steel is a nitrogen enhanced duplex stainless steel that was developed to combat common corrosion problems encountered with the 300 series stainless steel. The structure of S32205 duplex stainless steel consists of austenitic pools surrounded by a continuous ferritic phase. In the annealing condition, ASTM A789 duplex 2205 tubing contains approximately 40-50% ferrite. Often referred to as the workhorse grade, SA789 S32205 2205 is the most widely used grade in the duplex stainless steel tube.
ASME SA 789 UNS S32205 Duplex Tubing provides pitting and crevice corrosion resistance superior to 316L or 317L austenitic stainless steel in almost all corrosive media. SA 789 UNS S32205 tube also has high corrosion and erosion fatigue properties as well as lower thermal expansion and higher thermal conductivity than austenitic. The advantage of a 2205 duplex structure is that it combines the favorable qualities of a ferritic alloy stress corrosion cracking resistance and high strength with austenitic alloy ease of fabrication and corrosion resistance.
UNS S32205 Duplex Stainless Steel Tubes Applications
- Pressure vessels, tanks, piping, and heat exchangers in the chemical processing industry
- Piping, tubing, and heat exchangers for the handling of gas and oil
- Effluent scrubbing systems
- Pulp and paper industry digesters, bleaching equipment, and stock-handling systems
- Rotors, fans, shafts, and press rolls requiring combined strength and corrosion resistance
- Cargo tanks for ships and trucks
- Food processing equipment
- Biofuels plants
