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ATI Allegheny Ludlum AL Altemp® 625 Nickel-Base Superalloy, UNS N06625
Categories: Metal; Nonferrous Metal; Nickel Alloy; Superalloy

Material Notes: Allegheny Ludlum Altemp 625 alloy is an austenitic nickel-base superalloy possessing excellent resistance to oxidation and corrosion over a broad range of corrosive conditions, including jet engine environments and in many other aerospace and chemical process applications. Specific uses include jet engine nacelles, engine plumbing, aircraft ducting, recuperators, and thrust reversers. The alloy has outstanding strength and toughness at temperatures ranging form cryogenic temperature to 1093°C. This alloy also has exceptional fatigue resistance.

The Altemp 625 alloy derives its strength from the solid solution strengthening effects of molybdenum and columbium on the nickel-chromium matrix. These elements also contribute to the alloy's outstanding corrosion resistance. Although the alloy was developed for high temperature strength, its highly alloyed composition provides a high level of general corrosion resistance to a wide range of oxidizing and non-molybdenum provide excellent resistance to chloride ion pitting and the high level of nickel provides resistance to chloride stress corrosion cracking.

The material posses a high degree of formability and shows better weldability than many high alloyed nickel-base alloys. The alloy is resistant to intergranular corrosion even in the welded condition.

Information provided by Allegheny Ludlum.

Key Words: DIN 2.4856; ASTM B-443; ASME SB-443; AMS 5599
Vendors:
Available Properties
  • Density
  • Hardness, Rockwell B, Typical Annealed
  • Tensile Strength, Ultimate, For flat products (<4" thickness) and seamless tube and pipe
  • Tensile Strength, Yield, For flat products (<4" thickness) and seamless tube and pipe
  • Elongation at Break, Typical Annealed
  • Magnetic Permeability, 75F; 200 Oe
  • Specific Heat Capacity
  • Melting Point
  • Solidus
  • Liquidus
  • Maximum Service Temperature, Air, Excellent oxidation and scale resistance to this temp.
  • Aluminum, Al
  • Carbon, C
  • Chromium, Cr
  • Iron, Fe
  • Manganese, Mn
  • Molybdenum, Mo
  • Nickel, Ni, as balance; includes Co
  • Niobium, Nb (Columbium, Cb)
  • Phosphorus, P
  • Silicon, Si
  • Sulfur, S
  • Titanium, Ti
  
Property Data

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Manufacturer Notes:
ATI Allegheny Ludlum, Allegheny Technologies Incorporated

Category Notes
none

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