UNS #S32750

2507 is a duplex stainless steel with a microstructure consisting of austenite and ferrite phases in approximately equal amounts. The chemical composition and microstructure impart a good combination of strength, corrosion resistance and toughness with an annealed yield strength twice that of typical austenitic stainless steels possessing comparable impact strength. 2507 exhibits good resistance to general corrosion in many acid environments with exceptional resistance to chloride stress corrosion cracking, pitting and crevice corrosion.

Type Analysis

  • Carbon (Maximum) 0.03
  • Phosphorus (Maximum) 0.035
  • Silicon (Maximum) 0.8
  • Nickel (Nominal) 7
  • Manganese (Maximum) 1.2
  • Sulfur (Maximum) 0.02
  • Chromium (Nominal) 25
  • Molybdenum (Nominal) 4
  • Iron (Nominal) Balance
  • Nitrogen (Nominal) 0.28


oil and gas production equipment, such as valves, fittings, shafts and pump parts as well as equipment with exposure to a seawater environment.

Applicable Specifications

  • ASTM A182
  • ASTM A479





Browse our growing library of resources including case studies, product brochures, technical data sheets, product selection guides and more.