Cast iron rolls are a type of roll designed for the rolling process, play a critical role in shaping and processing metals. Cast iron rolls are typically made of a special type of cast iron that is engineered to withstand the extreme pressures and temperatures encountered,especially in hot rolling mills. -Hot Rolling Mills: Cast iron rolls are commonly used in hot rolling mills, metal is processed at high temperatures. They help shape steel ingots, billets, or slabs into finished products like plates, sheets, and coils.