Cobalt alloys have good thermal weldability and fatigue resistance.Ĭobalt vs HSS Drill Bit Comparison Table HSS vs Cobalt – General Information.So cobalt drill bits better absorb stresses to higher absolute temperatures. Cobalt alloy has higher melting point than other HSS alloys.
The cobalt-base superalloys have their origins in the Stellite® alloys patented in the early 1900’s by Elwood Haynes.Ĭobalt alloys are widely used because of such reasons: The performance of HSS tools can be further improved by application of the coating.
HSS tools show nice toughness and capable of withstanding against the intermittent or cyclic loading. Our HSS vs cobalt drill bit comparison we’ll begin with the assertion that the “cobalt bits” are one of the types of HSS – High Speed Steel bits.
