HIGH SPEED STEEL Russian patent published in 2008 - IPC C22C38/52 

FIELD: metallurgy.

SUBSTANCE: invention refers to compositions of steel, used for fabrication of cutting tools operating at high speed. Steel contains carbon, silicon, manganese, chromium, tungsten, molybdenum, vanadium, nickel, cobalt, aluminium, rhenium and iron at a following composition of elements, wt %: carbon 0.3-0.6, silicon 0.03-0.08, manganese 0.1-0.2, chromium 5.5-6.5, tungsten 5.5-6.5, molybdenum 5.5-6.5, vanadium 5.5-6.5, nickel 5.5-6.5, cobalt 5.5-6.5, rhenium 5.5-6.5, aluminium 0.05-0.1, iron - the rest.

EFFECT: upgraded impact resilience of steel.

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