Lawv yog ua los ntawm carbon steel.Lawv yog ua los ntawm #45 steel los yog #60 steel.Lawv ua tiav los ntawm kev kos duab hlau, annealing, ntsia thawv ua, quenching thiab lwm yam txheej txheem, lawv nyuaj.Nws txoj haujlwm yog txhawm rau ntsia hlau ntawm qee yam khoom tawv uas lwm cov ntsia hlau tsis tuaj yeem, vim tias cov khoom sib txawv ntawm cov ntsia hlau zoo tib yam, whick yog rau cov rau tes tshwj xeeb.Lub hardness ntawm cov ntsia hlau yog heev larde tuab thiab luv, thiab lub peev xwm nkag tau yog heev muaj zog.