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End practice
Question 8
A plate that is 250 mm wide and 25 mm thick is to be reduced in a single pass in a two
high rolling mill to a thickness of 20 mm. The roll has a radius = 500 mm, and its speed =
30 m/min. The work material has a strength coefficient = 240 MPa and a strain hardening
exponent = 0.2. The roll torque required to drive each roll is (in kN-m). (Round off to
one decimal place only)
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