Many stellite compounds can't really be cut, only ground or abraded. I use stellite 100 cutting tools in a lathe, and they're made to cut, not be cut.

Stellite contain iron, cobalt, chromium, mangan, carbon, molybdenum, etc.

depending on Head dia of the valve we have to set the Rotation of the valve, Stellite flow and Current

austenitic steel. Leading and trailing edges might have stellite added.

In depends on the hardfacing technique and the final Fe dilution. Typical values range 42-45 HRC.