A bloom is one of the types of steel ingots, also known as a billet bar, and when molten steel is produced from raw materials, it is cast into bloom molds.

This product has a width of more than 15 cm and a cross-sectional size larger than that of a billet (i.e., greater than 23 cm). Blooms are mainly used for the production of industrial rebars and are also applied in manufacturing products such as structural profiles , I-beams, channels, and similar sections.

Steel blooms are produced in different sizes in steel plants. After solidification, the blooms undergo a cooling stage and are then transferred to rolling mills. In the rolling mill, the blooms enter the rolling line and are plastically deformed. Finally, various finished steel products are produced from these blooms.