2507 (UNS S32750) is a super duplex stainless steel designed for applications which require exceptional strength and corrosion resistance. 2507 is a 25% chromium, 4% molybdenum, and 7% nickel alloy resulting in excellent resistance to chloride pitting and crevice corrosion attack. The duplex structure provides 2507 with exceptional resistance to pitting and chloride stress corrosion cracking.

Usage of 2507 should be limited to applications below 600° F (316° C). Extended exposure to elevated temperatures can reduce its toughness and corrosion resistance.


2507 Fittings, 2507 Flanges, 2507 Pipe, 2507 Plate, 2507 Round Bar, 2507 Sheet

Common Trade Names

Duplex 2507, Super Duplex Stainless, UNS S32750


  • High resistance to chloride stress corrosion cracking
  • Strong resistance to chloride pitting and crevice corrosion
  • High strength
  • Strong general corrosion resistance
  • Suggested for applications up to 600° F
  • Good weldability / workability
  • Resistant to pitting and crevice corrosion in seawater


  • Desalination Equipment
  • Chemical process pressure vessels, piping and heat exchangers
  • Marine Applications
  • Flue Gas Scrubbing Equipment
  • Pulp & Paper Mill Equipment
  • Offshore Oil production/technology
  • Oil and gas industry equipment