Inconel® 625 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
    Inconel® 625 Plate - AMS 5599


  • Inconel® 625 plate is an austenitic nickel-base alloy with excellent resistance to oxidation and corrosion over a broad range of conditions, including jet engine and chemical process applications. This alloy has superior corrsoion resistance when compared with Alloy 718. Inconel® 625 plate also 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

Common Trade Names

  • Nickel 625, Alloy 625, Inconel® 625

Industry Applications

  • Aerospace
  • Naval
  • Chemical Processing
  • Oil & Gas


  • Non-magnetic.  Inconel® 625 plate can be used for parts requiring both corrosion and oxidation resistance up to 2000ºF (1093°C). This alloy is exceptionally resistant to crevice corrosion and stress corrosion cracking and to chemical attack in both highly oxidizing to moderately reducing conditions. Inconel® 625 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. This 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. Inconel® 625 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 


  • Inconel® 625 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 alloy can be put into service without any subsequent postweld thermal treatments.

Density: 0.305 lbs/in3, 8.44 g/cm3

* INCONEL and INCOLOY are trademarks of the Special Metals Corporation group of companies.