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Stellite® Alloy 25 Cobalt Chromium Cast Alloy

 

Subcategory: Superalloy; Nonferrous Metal; Cobalt Base

Key Words: Deloro Stellite Inc.

Material Notes:
Cobalt content above calculated as balance.

Stellite alloy 25 forms a protective oxide film during hot metal-on metal wear which prevents metal transfer and damage due to adhesion. The alloy is resistant to thermal cracking and surface fatigue. Since the micro-structure is relatively free of carbide reinforcement, it is not recommended for low stress or low angle particle erosion service.

Stellite alloy 25 is resistant to oxidation and carburization up to 1900°F. The alloy resists wet chlorine at ambient temperatures and is resistant to nitric and hydrochloric acids under certain conditions. Exposure testing is recommended to verify performance.

Applications include metal working tools where a combination of metal-on-metal wear, thermal fatigue and hot corrosion resistance are required, such as piercing points, forming tools, and extrusion dies. Also used for furnace hardware. The alloy is normally used in the as-cast condition, but can be age hardened in the 1300° to 1500°F range for 4 to 50 hours. Solution annealing involves quenching or forced air cooling from 2175° to 2225°F.

Information provided by Deloro Stellite Inc.

Available Properties
  • Density
  • Hardness, Brinell
  • Hardness, Rockwell C
  • Tensile Strength, Ultimate
  • Tensile Strength, Yield
  • Elongation at Break
  • Reduction of Area
  • Modulus of Elasticity
  • Charpy Impact
  • CTE, linear 20°C
  • CTE, linear 250°C
  • CTE, linear 500°C
  • Thermal Conductivity
  • Melting Point
  • Solidus
  • Liquidus
  • Maximum Service Temperature, Air
   
Property Data

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