Co-Based Heat-Resistant Alloys, Superalloys

Both wrought and cast Co-based heat resistant alloys, listed in Tables 3.1-84 and 3.1-86, respectively, are also referred to as Co superalloys. They are based on the face-centered cubic high temperature phase of Co which is stabilized between room temperature and the solidus temperature by alloying with 10wt%Ni. They are solid-solution strengthened by alloying with W, Ta, and Mo. Furthermore, they are dispersion strengthened by carbides. 

Property SteDite 21 II Stellite 6 II SteUite 12 II Stellite 1 Tribaloy T-800  

Coefficient of thermal expansion, °C (°F ) 14.8x10- 15.7x10- 14x10- 13.1x10 12.3x10  

Hot hardness, HV, at (8.2x10-6) (8.7x10-6) (7.8x10-6) (7.3x10-6) (6.8x10-6) 

Property Stellite 21 Stellite 6 Stellite 12 Stellite 1 Tnbaloy T-800 3  

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