Cobalt Alloys

The cobalt-base superalloys have their origin in the Stellite® alloys, designed for their wear resistance in the early 1900’s by Elwood Haynes.

Although in terms of properties, the hardened nickel-based alloys have taken share of the superalloy market, the cast and wrought cobalt alloys continue to be used because of higher melting points that nickel alloys and superior hot corrosion resistance to gas turbine atmospheres.