A cylindrical rod of brass originally 0.40 in ( 10.2 mm ) in diameter is to be cold worked by drawing. The circular cross section will be maintained during deformation. A cold-worked tensile strength in excess of 55,000 psi ( 380 MPa ) and a ductility of at least
15%EL
are desired. Further more, the final diameter must be 0.30 in ( 7.6 mm ). Explain how this may be accomplished.