High Speed Steel: Properties and Tool Uses
High Speed Steel is a tough, heat-resistant tool material used for drills, milling cutters, taps, reamers, broaches, and other cutting tools. Learn its properties, grades, applications, selection factors, and care.
HSS combines hardness, toughness, red hardness, grindability, and resistance to chipping. Common grades use alloying elements such as tungsten, molybdenum, chromium, vanadium, and cobalt to balance wear resistance and heat performance. It is often preferred for interrupted cuts, complex tool shapes, manual machines, and applications that need a forgiving cutting edge.
Correct speed, feed, coolant, geometry, and rigid workholding improve tool life and surface finish. Inspect edge wear, cracks, buildup, runout, and heat discoloration before production, and regrind tools before severe damage occurs. A qualified cutting tool manufacturer can recommend suitable grades. General high-speed steel information also explains composition, properties, and uses.
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