A slab is a wide and flat semi-finished steel product that serves as the primary feedstock for producing hot-rolled and cold-rolled coils, sheets, and plates. The quality of a slab strongly affects surface finish, thickness uniformity, formability, and overall performance of the final steel sheet. A premium slab must have a smooth surface, clean edges, consistent thickness, and a homogeneous internal structure. These characteristics ensure stable rolling operations, reduced defect rates, and high-quality final products across automotive, construction, machinery, and appliance industries.