Cov pa roj carbon steel yog cov hlau alloy nrog carbon thiab hlau, nrog cov ntsiab lus carbon txog 2.1% los ntawm qhov hnyav.Qhov nce ntawm cov pa roj carbon feem pua yuav nce steel lub hardness thiab lub zog, tab sis nws yuav tsawg dua.Cov pa roj carbon steel muaj cov khoom zoo hauv hardness thiab lub zog, thiab nws tsis tshua kim dua lwm cov hlau.
Cov pa roj carbon txias dov steel coils thiab strips yog tsim los nrog cov txheej txheem tsim khoom zoo heev, uas yog siv dav hauv tsheb, tshuab ntxhua khaub ncaws, tub yees, khoom siv hluav taws xob thiab cov khoom siv hlau.Los ntawm kev sib txawv ntawm cov feem pua ntawm cov pa roj carbon steel, nws tuaj yeem tsim cov hlau nrog ntau yam sib txawv.Feem ntau, cov ntsiab lus carbon ntau dua hauv cov hlau ua rau cov hlau nyuaj, brittler thiab tsawg dua ductile.