SAF 2507 Duplex Stainless Steel

Standards:SAF 2507 ASTM A789 / A790           Grade(UNS):S32750           Type:Duplex Stainless steel

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SAF 2507 Duplex Stainless Steel Characteristics

SAF 2507 is a super duplex stainless steel with excellent corrosion resistance.

It has many advantages of ferritic stainless steel and austenitic stainless steel. The content of chromium and molybdenum in the stainless steel is very high.

Duplex 2507 stainless steel has high compressive strength, impact strength and high thermal conductivity. These characteristics are suitable for many structural parts and mechanical components. It has a high impact strength and should not be exposed to temperatures higher than 570 ° f for a long time, which may weaken its toughness.

The duplex microstructure ensures high-stress resistance and mechanical strength of 2507 stainless steel.

SAF 2507 super duplex stainless steel

SAF 2507 chemical composition


Heat treatment

Hot working: material temperature 1000-1200 ° C (1830-2190 ℉)

Heating rate: 1000 ° C (1830℉)

SAF 2507 duplex stainless steel microscopic

SAF 2507 Standards

  • UNS: S32750
  • EN Number: 1.4410
  • BS-EN: X-2-CrNiMoN 25-7-4
  • SS: 2328


  • Pulp, paper industry
  • Desalination of seawater and flue gas purification
  • Heat exchanger
  • Cargo ship piping system, sea water system

Mechanical properties

Yield strength (Rp0.2 / MPa)≥582
Tensile strength (Rm / MPa)≥811
Impact (Kv / J)21
Elongation (A / %)34
Density7.8 g/cm³
Hardness (HB)411


Corrosion resistance

Duplex 2507 stainless steel(UNS S23750)  has high chromium and molybdenum content and strong corrosion resistance to organic acids

Duplex 2507 stainless steel(UNS S23750) also has strong corrosion resistance to inorganic acid

Compared with 904L stainless steel, duplex 2507 stainless steel(UNS S23750) duplex stainless steel has stronger corrosion resistance to sulfuric acid mixed with chloride ions. 904L is an austenitic alloy, which is specially used to resist the corrosion of pure sulfuric acid

Other features

  • High compressive strength
  • High impact strength
  • High thermal conductivity
  • High impact strength

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

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