tööriistateras, mis sisaldab legeerelemente, mis väldivad terase pehmenemise temperatuuridel 250-300 oC; stantside, valuvormide, rakiste valmistamiseks kasutatav legeerteras (vrd kuumstantsiteras), tool steel what do have the alloy content necessary to resist softening (e.g tungsten) at elevated temperatures; they would be used and have prolonged service at temperature in exess of 250 oC (compare: hot-work tool steel)