Alloy tool steel bụ ụdị nchara nke na-agbakwunye chromium, molybdenum, tungsten, vanadium na ihe ndị ọzọ alloy na carbon ngwá ọrụ ígwè iji melite hardability, ike, eyi iguzogide na okpomọkụ na-eguzogide. A na-eji ya eme ihe n'ụzọ zuru ezu iji rụpụta ngwaọrụ nha, ngwaọrụ ịkpụ, ngwaọrụ na-eguzogide mmetụta, oyi na-ekpo ọkụ na-ekpo ọkụ, na ụfọdụ ngwá ọrụ pụrụ iche.