Cold-birgima bakin ciki karfe farantin ne abbreviation na talakawa carbon tsarin karfe sanyi-birgima farantin. Ana kuma kiransa da farantin sanyi, wanda aka fi sani da farantin sanyi, kuma a wasu lokutan ana yin kuskuren rubuta shi azaman farantin mai sanyi.
Cold farantin an yi da talakawa carbon tsarin karfe tsiri mai zafi birgima karfe, wanda aka kara sanyi-birgima a cikin wani karfe farantin da kauri na kasa da 4mm.
Tun da mirgina a dakin da zafin jiki ba ya samar da ƙarfe oxide sikelin, sanyi farantin yana da kyau surface ingancin da high girma daidaito. Haɗe tare da annealing jiyya, inji Properties da aiwatar da aikin sun fi zafi-birgima na bakin ciki karfe faranti.
A fagage da yawa, musamman a fannin kera kayan aikin gida, a hankali an yi amfani da shi don maye gurbin farantin karfe mai zafi mai birgima.