Cementite, also known as iron carbide (Fe₃C), is a hard, brittle compound found in steel and cast iron. It forms during the cooling process of these materials and plays a crucial role in determining their mechanical properties. Cementite contributes to the hardness and strength of steel, making it essential for various industrial applications. In the context of metallurgy, cementite is often studied alongside ferrite and pearlite, which are other microstructural components of steel. The presence and distribution of cementite influence the material's performance, particularly in tools and machinery where durability is critical.