DIN EN 877 Tuubooyinka Birta Cas iyo Qalabyada, Adeegga Alaabta Birta Cast Cast, Warshada Asalka ah ee Shiinaha

Birta kabka cawl waxa loola jeedaa birta kabka ah ee leh garaafiga flake, kaas oo loo yaqaan birta cawlan sababtoo ah jabku waa cawl madow marka la jabo. Qaybaha ugu muhiimsan waa birta, carbon, silicon, manganese, baaruud, iyo fosfooraska. Waa birta shubka ah ee ugu isticmaalka badan waxsoosaarkeeduna waxa ay ka dhigan yihiin in ka badan 80% wadarta wax soo saarka birta. Birta kabka cawl waxay leedahay sifooyin wax-ka-saarid iyo goyn wanaagsan iyo iska caabin wanaagsan. Waxaa loo isticmaalaa in lagu soo saaro shalefyada, armaajooyinka, iwm birta shubku way ka hoosaysaa birta kale ee shubka ah. Laakin waxa ay leedahay gariir aad u fiican, dareen hoose, iyo iska caabin heersare ah.

Birta cawlan waxay leedahay kaarboon heer sare ah (2.7% ilaa 4.0%), kaas oo loo tixgalin karo sida jaantuska birta kaarboonka iyo graphite flake. Marka loo eego qaab-dhismeedka matrix-yada kala duwan, birta kabka cawl waxa loo qaybiyaa saddex qaybood: ferrite matrix birta cawl; pearlite-ferrite matrix kabka cawl; matrix pearlite bir kabka cawl

Waqtigan xaadirka ah, alaabadayada kabka cawlan waxay inta badan yihiin dhejisyada tuubooyinka dheecaanka birta.