![]() ![]() To produce the 0.1-cm copper plate, we begin with a 0.167 to 0.182-cm copper plate in the softest possible condition, then cold roll the plate to a 40% to 45% reduction in thickness to achieve the 0.1 cm thickness. Percent reduction in thickness = [\frac=0.182 \ cm Original thickness of the copper plate prior to rolling can be calculated from Equation 8-5, 125 HB From the stress-strain curve the tensile strength is 450. Tensile strength or ultimate tensile strength. Modulus of elasticity or young's modulus. The yield stress and offset yield stress. The relation between the engineering stress and engineering strain according to the results obtained from the tensile test. To produce the plate, a cold-rolling process would be appropriate. Answer to Solved 500 70 Tensile strength 450 MPa (65,000 psi) 60 400. Objectives: To determine the followings 1. Therefore, any cold work between 40% and 45% gives the required mechanical properties. Grade 3 is the least used CP grade, although the medium oxygen contents yields a higher strength of 65000 psi or 450 MPa. From Figure 8-6, we need at least 35% cold work to produce a tensile strength of 65,000 psi and 40% cold work to produce a yield strength of 60,000 psi, but we need less than 45% cold work to meet the 5% elongation requirement.
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