Karfe nada, wanda kuma aka sani da karfen karfe.Ana jujjuya karfe ta hanyar matsawa mai zafi da latsa sanyi.Domin sauƙaƙe ajiya da sufuri da sarrafawa iri-iri.Coil ɗin da aka kirkira galibi naɗaɗɗen zafi ne da naɗa mai sanyi.Motsi mai zafi samfuri ne da aka sarrafa kafin sake recrystallization na billet.Cold Rolled Coil shine aiki na gaba na nada mai zafi.Masana'antar mu galibi tana samarwa da sarrafa coil mai sanyi.Karfe nada, launi mai rufi da abokan cinikinmu na haɗin gwiwar gabaɗaya suna yin odar ƙarfe na ƙarfe tare da nauyin kimanin 25-27t.Karfin na'ura mai zafi na kasar Sin na ci gaba da fadadawa, an riga an sami dimbin layukan na'ura mai zafi, kuma ana gab da gina wasu ayyuka ko fara aiki.Misali, muna sayar da dx51d Z100 galvanized karfe coil da kyau.

Launi shafi yi samfur ne dangane da zafi-tsoma galvanized farantin, zafi-tsoma aluminum tutiya farantin da electro galvanized farantin.Bayan da aka yi gyaran fuska (gurnawar sinadarai da maganin juyar da sinadarai), ana shafa ɗaya ko fiye da yadudduka na kayan kwalliya a saman, sannan a gasa su da ƙarfi.An sanya masa suna ne bayan kwandon karfe mai launi wanda aka lullube shi da launuka daban-daban na kayan shafa, wanda ake kira coil mai launi a takaice.Bugu da ƙari ga kariyar kariyar zinc, ƙwayar kwayoyin halitta a kan Layer na zinc yana taka rawa wajen rufewa da kuma kare launi mai launi na karfe tare da igiyar galvanized mai zafi mai zafi a matsayin kayan tushe, don hana shingen karfe daga tsatsa.Rayuwar sabis tana kusan sau 1.5 fiye da na galvanized karfe tsiri.Rubutun launi mai launi yana da nauyi mai sauƙi, kyakkyawan bayyanar da kyakkyawan aikin rigakafin lalata, kuma ana iya sarrafa shi kai tsaye.An raba launi gaba ɗaya zuwa launin toka mai launin toka, shuɗin teku da ja bulo.An fi amfani dashi a masana'antar talla, masana'antar gini, masana'antar kayan gida, masana'antar kayan lantarki, masana'antar kayan daki da masana'antar sufuri.

Rubutun da aka yi amfani da shi a cikin rubutun launi na launi zai zaɓi guduro mai dacewa bisa ga yanayin amfani daban-daban, kamar polyester silicon modified polyester, polyvinyl chloride filastik sol, polyvinylidene chloride, da dai sauransu Masu amfani za su iya zaɓar bisa ga manufar.