Saboda kyakkyawan ductility, thermal conductivity da conductivity, jan karfe ne yadu amfani a daban-daban masana'antu, yafi a wutar lantarki, gini, iyali kayan, sufuri da sauran masana'antu.

A cikin masana'antar wutar lantarki, jan karfe shine mafi dacewa da kayan ƙarfe mara daraja a matsayin jagora.Bukatar jan ƙarfe a cikin wayoyi da igiyoyi a cikin masana'antar wutar lantarki yana da yawa sosai.A cikin masana'antar kayan aikin gida, ana amfani da tagulla a cikin injin daskarewa da bututun sarrafa zafi na firiji, na'urorin sanyaya iska da sauran kayan aikin gida.

A cikin masana'antar gine-gine, ana amfani da bututun tagulla sosai wajen gina radiators, tsarin iskar gas da samar da ruwa da tsarin magudanar ruwa.A cikin masana'antar sufuri, ana amfani da allunan jan karfe da tagulla don na'urorin jirgi, motoci da na jiragen sama.

Bugu da ƙari, ana amfani da babban adadin tagulla a cikin tsarin kewayawa na kayan sufuri.Daga cikin su, masana'antar samar da wutar lantarki ita ce masana'antar da ta fi yawan amfani da tagulla a kasar Sin, wanda ya kai kashi 46% na yawan abin da ake amfani da shi, sai kuma gine-gine, da kayayyakin amfanin gida da sufuri.