HSS high speed steel drill bit
It is often used in electric saw blades and drills.
It is superior to older high-carbon steel tools that were widely used during the 1940s in that it can withstand higher temperatures without losing its temper (hardness).
This property allows HSS to cut faster than high carbon steel, hence the name high speed steel.
At room temperature, with the commonly recommended heat treatment, HSS grades typically exhibit high hardness (above Rockwell hardness 60) and wear resistance (usually associated with blue
