EXAMPLE 13.1 Calculation of Roll Force and Torque in Flat-rolling An annealed copper strip 228 mm wide and 25 mm thick is rolled to a thickness of 20 mm in one pass. The roll radius is 300 mm, and the rolls rotate at 100 rpm. Calculate the roll force and the power required in this operation. Take the value of K as 530 MPa and n as 0.44