Peb cov txheej txheem tsim khoom siv cov hlau boron alloy dov thiab cov tshuab hnyav kom ntseeg tau tias qhov loj me raug, nrog rau txhua yam khoom raug quenching thiab tempering kub siab. Qhov nyuaj ntawm qhov chaw yog txij li HRC 48 txog 56, nrog rau qhov tob txij li 6 txog 12 millimeters.
