Billet is a material primarily used in the metallurgy industry, which involves the production and processing of metals and metal alloys. Billet can be considered the raw form of metal, generally obtained by smelting iron ore. The liquid iron obtained from the smelting process is poured into special casting molds to create billet iron. These billets are then processed into various forms for producing different metal products. Billet iron serves as a primary raw material in steel production and other metal processing operations across various industries.