Question

A strip of 200 mm wide and 10 mm thick is reduced to 8 mm in one pass. Roll diameter = 100 mm, average flow stress = 200 MPa. Rolling load is:

• A. 0.4 MN
• B. 0.8 MN
• C. 1.2 MN
• D. 1.6 MN

Hint:

Be careful with the roll diameter and roll radius.
Always convert the given diameter to radius ($R = D/2$) before substituting into the contact length formula $L = \sqrt{R \Delta h}$.

Answer 1

The Correct Option is A