Akwai dabaru daban-daban da kuma kalkuleta ta yanar gizo waɗanda ke ba mutum damar ƙididdige nauyin bakin ƙarfe cikin sauƙi.

An rarraba bakin karfe a cikin rukuni 5 kuma waɗannan sun haɗa da jerin ƙarfe 200 da 300 waɗanda aka sani da ƙarfe masu launin austenitic. Sannan akwai jerin 400, waɗanda su ne ƙarfe masu launin ferritic. Jerin 400 da jerin 500 ana kiransu da ƙarfe masu launin martensitic. Sannan akwai nau'ikan ƙarfe masu launin PH, waɗanda su ne ƙarfe masu launin ruwan sama masu taurare.

Kuma a ƙarshe, akwai cakuda ƙarfe mai kama da ferritic da austenitic, waɗanda aka sani da ƙarfe mai kama da duplex.