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Estimate the roll force, F (in MN) to roll an AISI 1020 carbon-steel strip that is 130 mm wide, and 11 mm thick, to a thickness of 7 mm. The

roll radius is 200 mm, and it rotates at 200 rpm. The average true stress of the AISI 1020 carbon-steel strip in the roll gap is 300 MPa.

Fig: 1