Ƙirƙirashine ƙirƙira na ƙarfe da aka shigar a cikin billet tare da guduma ko injin matsa lamba; Dangane da abun da ke tattare da sinadarai, ana iya raba ƙarfe zuwa ƙarfe na carbon da gami karfe.

(1) Bayan baƙin ƙarfe da carbon, sinadarai na carbon karfe kuma yana ɗauke da sinadarai irin su manganese silico, sulfur da phosphorus, daga cikinsu sulfur da phosphorus suna da ƙazanta mai cutarwa. Manganese silico wani sinadari ne na deoxidized wanda aka ƙara zuwa ƙarfe na carbon yayin aikin ƙera ƙarfe. Dangane da daban-daban abun ciki na carbon a cikin carbon karfe, yawanci ana kasu kashi uku masu zuwa:
Ƙananan ƙarfe na carbon: Abubuwan da ke cikin Carbon shine 0.04% -0.25%;
Matsakaicin karfe na carbon: 0.25% -0.55% abun ciki na carbon;
High carbon karfe: abun ciki na carbon fiye da 0.55%
(2) Karfe alloy aka ƙara daya ko da yawa alloying abubuwa a cikin carbon karfe da tempered karfe irin wannan karfe ƙunshi duka biyu a matsayin silicon manganese gami abubuwa ko daskararrun abubuwa, kuma ya ƙunshi sauran alloying abubuwa, kamar nickel chromium molybdenum vanadium titanium tungsten cobalt aluminum zirconium niobium da rare ƙasa abubuwa da dai sauransu Bugu da kari, wasu alli alloy da sauran abubuwan da ke cikin ƙasa ba tare da adadin adadin abubuwan da ke cikin boron ba. element a karfe, ya kasu kashi uku kamar haka:

Low gami karfe: jimlar alloying kashi abun ciki ne kasa da 3.5%;
Matsakaicin gami karfe: jimlar abun ciki na alloying shine 3.5-10%;
High gami karfe: jimlar alloying kashi abun ciki ya fi 10%
Dangane da adadin nau'ikan abubuwan gami da ke ƙunshe a cikin gami da ƙarfe, kuma ana iya raba su zuwa binary ternary da Multi-element alloy karfe bugu da ƙari, bisa ga nau'ikan abubuwan gami da ke cikin ƙarfe, ana iya raba su zuwa ƙarfe na manganese, ƙarfe na chromium, ƙarfe na boron, ƙarfe silicon, ƙarfe na manganese, karfe chromium manganese, karfe molybdenum, ƙarfe na chromium, karfe molybdenum, karfe, chromium, ƙarfe da ƙarfe, chromium da ƙarfe mai ƙarfi.