Alloy 625 Nickel Plate, AMS 5599

Available Thicknesses in Inches
.250" - 2"
Available Thicknesses in Millimeters
6.350 - 50.800
  • 625 nickel plate, ams 5599, pwa-lcs, ge-s400/s1000
    Alloy 625 Nickel Plate


  • Alloy 625 nickel plate is an austenitic nickel-base superalloy with excellent resistance to oxidation and corrosion over a broad range of conditions, including jet engine and chemical process applications. This grade has outstanding strength and toughness at temperatures ranging from cryogenic to 2000°F (1093°C), and are derived primarily from the solid solution strengthening of columbium and molybdenum in a nickel-chromium matrix.

Nominal Composition

  • Nickel 60%
  • Chromium 22%
  • Molybdenum 9%
  • Columbium plus Tantalum 4%

Standard Inventory Specifications

  • AMS 5599
  • ASTM B 443
  • GE S400/S1000
  • Rolls Royce Sabre 9000
  • Predominantly produced by AOD-ESR melt. Hot worked, solution treated annealed, then descaled.
  • DFARS compliant


  • Non-magnetic. Alloy 625 nickel plate can be used for parts requiring both corrosion and oxidation resistance up to 2000ºF (1093°C). This grade is exceptionally resistant to crevice corrosion and stress corrosion cracking and to chemical attack in both highly oxidizing to moderately reducing conditions. Alloy 625 nickel plate is virtually immune to corrosion in marine environments and is used extensively in the hot section of jet engines and in high temperature corrosive environments in the chemical processing industry. The grade has outstanding resistance to creep and stress rupture up to 1200ºF (649°C), and oxidation and scaling resistance up to 2000ºF (1093°C).


  • Hardness of Aerodyne stock is typically 185 BHN. The microstructure remains austenitic at both elevated and low temperatures. Alloy 625 nickel plate cannot be hardened by heat treatment but can be hardened by cold working. During cold working, this grade work hardens more rapidly than austenitic stainless steels. 


  • Rating: 16% of B-1112
  • Typical stock removal rate: 25 surface feet/minute with high speed tools. 100 surface feet/minute with carbide.


  • Use relatively heavy cuts and low speeds to minimize surface work hardening 


  • Alloy 625 nickel plate can be welded by most customary techniques, such as inert gas tungsten arc (TIG), gas metal arc welding (GMAW), plasma, electron beam, submerged arc and resistance welding. If excessive heat input and oxidation are avoided during welding, This grade can be put into service without any subsequent postweld thermal treatments.

Density: 0.305 lbs/in3, 8.44 g/cm3