![The maximum reduction in cross-sectional area per pass ( R ) of a cold wire drawing](https://www.gkseries.com/blog/wp-content/uploads/2023/10/The-maximum-reduction-in-cross-sectional-area-per-pass-R-of-a-cold-wire-drawing.jpg)
Q. The maximum reduction in cross-sectional area per pass ( R ) of a cold wire drawing process is
R = 1 – e-(n+1) ,
where n represents the strain hardening coefficient. For the case of a perfectly plastic material, R is
(A) 0.865 (B) 0.826 (C) 0.777 (D) 0.632
Ans: 0.632