A cylindrical piece of steel 25 mm (1.0 in.) in diameter is to be quenched in moderately

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A cylindrical piece of steel 25 mm (1.0 in.) in diameter is to be quenched in moderately agitated oil. Surface and center hardnesses must be at least 55 and 50 HRC, respectively. Which of the following alloys will satisfy these requirements: 1040, 5140, 4340, 4140, and 8640? Justify your choice(s).
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Materials Science and Engineering An Introduction

ISBN: 978-0470419977

8th edition

Authors: William D. Callister Jr., David G. Rethwisch

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