Abubuwan bututun ƙarfe na jan ƙarfe ya kamata su kasance waɗanda ke da ƙarfin ƙarfi mai kyau, ƙarfin gajiya, taurin da ya dace, ƙarancin elongation da ƙimar ƙimar zafi mai ƙarfi. A sakamakon haka, abu kamar phosphorous deoxidize jan karfe (DHP), CUAG, CR-ZR-CU suna karɓuwa sosai daga masu amfani da duk ƙasashe. Coatings: Copper yana da ƙananan taurin abin da ke haifar da ƙananan kayan hana lalata. Sabili da haka, yankin da ke ƙananan sassa na gyare-gyare, inda damuwa ya karu da yawa saboda harsashi, za a sawa sosai. Don ƙara tsawon rayuwar gyare-gyaren jan karfe, Uniform mold na ciki na ciki tare da taurin da ya dace ana buƙatar. Yawancin bututun ƙarfe na jan ƙarfe don ƙaramin simintin billet ɗin ba a amfani da su a cikin kowane tsarin simintin inda akwai tsayayyen goyon bayan rafi, saboda haka suna da hankali sosai don sawa. Mu yi amfani da wuya chrome plating don ƙara rayuwar mold tubes. Za a sarrafa kauri na plating a cikin mafi kyawun kewayon. Amma ga shafi na jan karfe mold faranti, dangane da mu shekaru gwaninta, za mu iya samar da Cr shafi, Ni-Cr shafi, Ni-Fe shafi saduwa da bukatar daban-daban abokan ciniki biyu a gida da kuma kasashen waje.