Grey cam khwb cia hlau, uas yog dav siv los tsim kev cai castings los ntawm ntsuab xuab zeb casting, plhaub pwm casting los yog lwm yam qhuav xuab zeb casting txheej txheem, muaj ib tug confortable hardness rau CNC machining. Grey hlau, los yog grey cam khwb cia hlau, yog ib hom cam khwb cia hlau uas muaj graphite microstructure. Nws yog lub npe hu ua grey xim ntawm lub pob txha tawg nws cov ntaub ntawv. Grey cam khwb cia hlau yog siv rau cov tsev nyob qhov twg qhov nruj ntawm cov khoom yog qhov tseem ceeb tshaj nws lub zog tensile, xws li lub tog raj kheej combustion engine cylinder blocks, twj tso kua mis vaj tse, valve lub cev, lub thawv hluav taws xob, counterweights thiab hniav castings. Grey cam khwb cia hlau lub siab thermal conductivity thiab lub taub hau muaj peev xwm feem ntau yog siv los ua cam khwb cia hlau cookware thiab disc nres rotors. Ib qho tshuaj lom neeg muaj pes tsawg leeg kom tau txais graphitic microstructure yog 2.5 mus rau 4.0% carbon thiab 1 mus rau 3% silicon los ntawm qhov hnyav. Graphite tuaj yeem tuav 6 mus rau 10% ntawm qhov ntim ntawm cov hlau grey. Silicon yog ib qho tseem ceeb rau kev ua grey hlau tsis zoo li cov hlau cam khwb cia dawb, vim hais tias silicon yog ib qho graphite stabilizing caij hauv cam khwb cia hlau, uas txhais tau hais tias nws pab cov alloy tsim graphite es tsis txhob hlau carbides; ntawm 3% silicon yuav luag tsis muaj cov pa roj carbon nyob rau hauv tshuaj ua ke nrog cov hlau. Lub graphite yuav siv sij hawm nyob rau hauv cov duab ntawm ib tug peb-dimensional flake. Nyob rau hauv ob qhov ntev, raws li ib tug polished nto yuav tshwm nyob rau hauv ib tug microscope, cov graphite flakes tshwm li cov kab zoo. Grey hlau kuj muaj peev xwm damping zoo heev thiab yog li nws feem ntau yog siv los ua lub hauv paus rau lub tshuab cuab yeej mountings.