M42

Cobalt High Speed Steel M42

M42 is a cobalt-bearing high speed steel built for exceptional hot hardness and wear resistance. It maintains cutting performance at elevated temperatures for long production runs. The grade delivers strong edge retention and high compressive strength in tough materials. Its fine, uniform structure supports precision grinding and stable tool geometry. M42 is commonly used for drills, taps, end mills, and broaches in demanding machining. It performs well on stainless steels, high-alloy steels, and heat-resistant materials. Built for productivity, M42 helps reduce tool change frequency in severe applications.