AISI 329 Duplex Stainless Steel

Standards:AISI 329 ASTM A789 / A790            Grade(UNS):S32900           Type:Duplex Stainless steel

Navigation Table

AISI 329 duplex stainless Steel Characteristics

AISI 329 (S32900) stainless steel is a duplex stainless steel with high yield strength, up to twice that of austenitic stainless steel.

329 duplex stainless steel has good pitting corrosion resistance, crevice corrosion resistance, oxidation resistance and stress corrosion resistance in chlorine containing water. It is a heat-resistant steel alloy.

329 stainless steel is a kind of high alloy duplex stainless steel. It is often used in heat exchanger and chemical industry in chlorine environment.

AISI 329 duplex stainless steel round bar

AISI 329 stainless steel chemical composition


Heat treatment

Fast cooling at 1010 ~ 1150 ℃ for solid solution

AISI 329 Standards

  • SS standard: SS 2324 (10RE51)
  • GB standard: 0Cr25Ni5Mo2
  • ASTM: S32900
  • JIS standard: 329JI
  • DIN standard W.NR.1.4460


  • It has good corrosion resistance
  • It is easy to clean
  • Excellent strength and toughness at low temperature
  • 329 stainless steel has good formability


  • Food processing
  • heat exchanger
  • Chemical pressure vessel
  • Conveyor
  • Architecture

Mechanical properties

329 stainless steel physical properties

  • Density: 7.93 g·cm-3
  • Melting point:  1398~1420
  • Resistivity: 0.73 Ω·mm2·m-1/ft
329 stainless steeltemperature, °F70212932
Coefficient of thermal expansion, in/in°F x 10-69.2
Thermal conductivity ft2 • hr • °F9.412.4
Elastic modulus, psi x 10629

* 70°F to indicated temperature

Typical tensile and impact properties

329 stainless steeltemperature, °F-425-320-100704008001200
ultimate tensile strength, ksi25023015090706648
yield strength, ksi100705035231915.5

Our duplex stainless steel grades

Duplex stainless steel is a kind of stainless steel composed of ferrite and austenite. The ferrite content is about 50%, and the austenite content is about 50%. This kind of steel has the characteristics of both austenitic stainless steel and ferritic stainless steel.

Duplex stainless steel pipe is one of the main products of our company. It has good corrosion resistance and welding performance. Widely used in steel, smelting, petroleum, chemical, marine equipment and other industries.

Because of the high strength of duplex stainless steel, it can save material, such as reducing the wall thickness of the pipe.
  1. Oil pipe in oil and natural gas industry
  2. Crude oil desalting
  3. Sulfur-containing gas purification
  4. Wastewater treatment equipment in refinery
  5. Cooling system using brackish water or chlorine solution
  6. Read More

Duplex stainless steel has almost twice as much yield strength as austenitic stainless steel, excellent corrosion resistance and weldability, and is widely used in various fields. Read more about the properties of duplex stainless steel

Ask Your Alloy Partner

Require Now