Stellite alloy is a range of cobalt-chromium alloys designed for wear resistance. It may also contain tungsten or molybdenum and a small but important amount of carbon. It is a trademarked name of the Kennametal Stellite Company and was invented by Elwood Haynes in the early 1900s as a substitute for cutlery that stained (or that had to be constantly cleaned).
Cobalt is a chemical element with symbol Co and atomic number 27. Like nickel, cobalt is found in the Earth crust only in chemically combined form, save for small deposits found in alloys of natural meteoric iron. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal.