Fe2C

Fe₂C (iron dicarbide) is an intermetallic compound and a primary constituent of cementite phase found in iron-carbon alloys and steels. It forms naturally during solidification and heat treatment of ferrous materials, where it plays a critical role in determining hardness, wear resistance, and brittleness through its presence in microstructures like pearlite and martensite. Engineers encounter Fe₂C primarily as a phase component rather than a standalone material; its properties and distribution directly influence the mechanical behavior of carbon steels, tool steels, and cast irons across a wide range of industrial applications.