Gabatarwar samfur:
Farar tagulla, gami da jan ƙarfe ne da nickel a matsayin babban abin da aka ƙara, fari ne na azurfa, tare da ƙoshin ƙarfe, don haka sunan farin tagulla.Copper da nickel za a iya narkar da juna har abada, don haka kafa wani ci gaba m bayani, wato, ko da kuwa da rabo daga juna, da kuma m α -single-lokaci gami.Lokacin da aka haɗa nickel zuwa jan jan ƙarfe fiye da 16%, launin gabobin da ke haifar da shi ya zama fari kamar azurfa, kuma mafi girman abun ciki na nickel, launin fata ya fi girma.Abubuwan da ke cikin nickel a cikin farin jan ƙarfe shine gabaɗaya 25%.