Tus qauv tawv ntawm sab nraum zoov folding folding riam yog feem ntau ntawm 58-65hhrc. Piv txwv li, npauj npaim 2750 quav cab siv CPM-Cruwear Super Tool Willing Steel nrog lub hardness ntawm li 63- folding riam muaj ib tug hniav tawv ntawm 58-60hrc. Tsis tas li ntawd, lub hardness ntawm CPM S30V hmoov stainless hlau yog 60HRC, nrog cov koom haum siab thiab kev sib xyaw ua ke thiab kev coj tawm heev.
Hardness yog qhov taw qhia tseem ceeb los ntsuas cov kev coj ua thiab cov caj dab ua kom muaj riam. Riam nrog cov hardness siab yog feem ntau hnav-tiv taus-tiv taus thiab tuaj yeem nyob twj ywm ntev dua. Txawm li cas los xij, siab dhau heev kuj yuav ua rau riam riam los ua cov nki thiab tawg yooj yim. Yog li ntawd, kev xaiv ntawm cov qauv hardness tsim nyog yuav tsum tau txiav txim siab raws li kev siv cov xwm txheej ntawm kev siv thiab cov kev xav tau tshwj xeeb.
