Cobalt Base

These alloys exhibit a high hardness and good corrosion resistance. They are often used in wear applications. Most of the grades cannot be welded.

Alloy Properties
Representative AlloysILLIUM® 6, ILLIUM® 21, (STELLITE®)
ApplicationsHot or corrosive atmosphere where lubrication is difficult; for resistance to wear, galling, impact, and thermal shock
LimitationsLow ductility in many grades
Typical UsesBushings, sleeves, knives, pump components, valves
WeldabilityGood to poor, depending on grade
Corrosion ResistanceExcellent


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