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Allegheny Ludlum AL 825™ Specialty Steel Alloy, UNS N08825

 

Subcategory: Superalloy; Stainless Steel; Nickel Base; Metal

Material Notes:
Iron content above calculated as remainder.

Allegheny Ludlum AL 825 alloy is an austenitic nickel-iron-chromium-molybdenum-copper alloy containing high levels of corrosion resistance to both moderately oxidizing and moderately reducing environments. The alloy has a high level of nickel, which in combination with the level of molybdenum and copper, produces substantially improved corrosion resistance in reducing environments compared to the standard stainless steels.

The nickel content is sufficiently high to provide superb resistance to chloride stress corrosion cracking. The chromium and molybdenum content of the alloy provides a level of resistance to chloride ion pitting, however, not to the level of other Allegheny Ludlum alloys. In addition, the alloy is stabilized against sensitization in the welded condition by the addition of a specified level of titanium. Because of this stabilization, the material is resistant to intergranular attack after exposure in the temperature range which would sensitize unstabilized stainless steels.

This alloy has a long history of use in many corrosive environments and has been incorporated in ASTM and ASME specifications for many years.

Information provided by Allegheny Ludlum

Available Properties
  • Density
  • Hardness, Rockwell B
  • Tensile Strength, Ultimate
  • Tensile Strength, Yield
  • Elongation at Break
  • Modulus of Elasticity
  • Electrical Resistivity
  • Magnetic Permeability
  • CTE, linear 20°C
  • CTE, linear 250°C
  • CTE, linear 500°C
  • Specific Heat Capacity
  • Maximum Service Temperature, Air
   
Property Data

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