Karfe za a iya raba zuwa low carbon karfe, matsakaici carbon karfe da high carbon karfe. Low carbon karfe - carbon abun ciki ne kullum kasa 0.25%; matsakaiciyar carbon karfe - abun ciki na carbon gabaɗaya tsakanin 0.25 da 0.60%; high carbon karfe - carbon abun ciki ne gaba ɗaya mafi girma fiye da 0.60%.
Matsayin zartarwa: ƙasata Taiwan CNS misali karfe lambar S20C, Jamus DIN daidaitaccen abu lambar 1.0402, Jamus DIN daidaitaccen karfe lambar CK22/C22. British BS misali karfe lambar IC22, Faransa AFNOR misali karfe lambar CC20, Faransa NF misali karfe lambar C22, Italian UNI misali karfe lambar C20/C21, Belgium NBN misali karfe lambar C25-1, Sweden SS misali karfe lambar 1450, Spain UNE misali karfe lamba No. F.112, American AISI/SAE misali karfe No. 1020, Jafananci JIS misali karfe No. S20C/S22C.
Abubuwan sinadaran: Carbon C: 0.32～0.40 Silicon Si: 0.17～0.37 Manganese Mn: 0.50 , kayan aikin injiniya : Ƙarfin ƙarfi σb (MPa): ≥530 (54) Ƙarfin Haɓaka σs (MPa): ≥315 (32) Tsawaita δ5 (%): ≥20 Yanki shrinkage ψ (%): ≥45 Tasirin makamashi Akv (J): ≥ 55 tasirin taurin darajar αkv (J/cm²): ≥69 (7) Taurin: unheated ≤197HB Girman samfur: Girman samfurin shine 25mm Ayyukan fasaha na ƙasa Standard: GB699-1999
