UNS S32750 F53

Excellent durability in highly corrosive conditions and widely used for valve manufacture in chemical processing and marine environments.

  • Alloy 2507
  • Werkstoffe number 1.4410
  • UNS S32750

Fully certified materials

Additional testing available

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Duplex stainless steels are about twice as strong as regular austenitic or ferritic stainless steels, have significantly better toughness and ductility than ferritic grades (although they do not reach the values of austenitic grades), have a range of corrosion resistance comparable to the range for austenitic stainless steels, have very good stress corrosion cracking resistance.

The term “Super-Duplex” denotes high-performance Duplex steel based on elevated contents of chromium, nickel and molybdenum. These elements improve pitting corrosion resistance, while additions of nitrogen promoted structural hardening, raising the yield strength and ultimate strength values without impairing toughness.

UNS S32750 F53 Chemical Composition


UNS S32750 F53 Mechanical Properties

Tensile Strength (Mpa/ N/ mm2)730-930
0.2% Proof Stress (MPa /N/mm2 ) minimum530
Elongation (A5 & 4D) minimum23.00%
Hardness (HB) maximum290
Charpy V-notch Impact at ambient Temp (J)100 minimum
Ultrasonic TestingAt customers request
Ferrite Content50.00%
MicrostructureMicrostructure certified free from grain boundary carbides, sigma, chi and laves phases

For more technical information download our F53 information sheet here


F53’s excellent corrosion resistance, strength and ductility opens it to use in many environments, such as marine, food processing, pollution control, the oil and gas and pulp and paper industry.

End uses:

  • Fasteners
  • Valves
  • Oil and chemical tankers
  • Pumps
  • Bleaching components
  • Propellers
  • Fans
  • Fertiliser production

“Our philosophy: customer service first, second & third – quick response to requests for quote, same day / next day service on UK deliveries, long term relationships, and generally making the extra effort – all to earn our motto of “Global Reach, Personal Touch”

Mike Andrews


Proud Associates

Broder Metals Group Certified To AS9120
Broder Metals Group Certified To AS9120