Cov pa roj carbon steel yog cov hlau-carbon alloy nrog cov ntsiab lus carbon ntawm 0.0218 feem pua rau 2.11 feem pua. Kuj hu ua carbon steel. Feem ntau kuj muaj me me ntawm silicon, manganese, sulfur, phosphorus. Feem ntau, qhov siab dua cov ntsiab lus ntawm cov pa roj carbon steel, qhov hardness ntau dua thiab siab dua lub zog, tab sis cov yas qis dua.
