Peb qhov tseem ceeb ntawm cov cuab yeej steel yog: hnav tsis kam, kub tsis kam thiab toughness. Alloying ntsiab yog ntxiv los txhim kho lub zog, hnav tsis kam, hardness thiab toughness.
Lub steel tsis kam rau deformation yog ntsuas los ntawm nws hardness. Rockwell Hardness C test feem ntau yog siv los ntsuas qhov hardness ntawm cov cuab yeej steel.
Nyob ntawm qib steel, hardened txias ua hauj lwm cuab yeej steels muaj ib tug hardness ntawm kwv yees li 58/64 HRC (Rockwell C). Cov cuab yeej ua haujlwm txias feem ntau muaj qhov nyuaj ntawm 60/62 HRC thiab qee zaus mus txog 66 HRC.
