Liphaephe tsa tšepe tsa nodular cast iron ha e le hantle ke liphaephe tsa tšepe tsa ductile, tse nang le moelelo oa tšepe le thepa ea tšepe, ke ka hona li rehoang lebitso. Graphite ka liphaephe tsa tšepe tsa ductile e teng ka sebopeho sa spherical, ka boholo bo akaretsang ba limaraka tse 6-7. Mabapi le boleng, boemo ba spheroidization ba liphaephe tsa tšepe tse entsoeng ka tšepe bo hlokeha ho laoloa maemong a 1-3, ka tekanyo ea spheroidization ea ≥ 80%. Ka hona, thepa ea mechine ea thepa ka boeona e ntlafalitsoe, e nang le mohloli oa tšepe le thepa ea tšepe. Ka mor'a ho kenngoa, microstructure ea liphaephe tsa tšepe ea ductile ke ferrite e nang le pearlite e nyenyane, e nang le thepa e ntle ea mochine, kahoo e boetse e bitsoa liphaephe tsa tšepe tse entsoeng ka tšepe.