Cyclopedia of mechanical engineering; a general reference work. Editor-in-chief Howard Monroe Raymond. Assisted by a corps of mechanical engineers, technical experts, and designers of the highest professional standing (1908)
American School (Chicago, Ill.), Raymond, Howard Monroe · Chicago American Technical Society · leaf 372
s a certain color. If any bright piece of iron or steel be heated, when a temperatureof about 400° F is reached, the surface will turn pale yellow. As thetemperature is increased this yellow grows darker until at about 500° Fit is a decided brown. WTien 600° F is reached, a deep blue color showson… … FORGING 63 Tempered tools may he divided into two general classes: First,those wliicli have one edge only temjicred; se<ond, those whichare femperetl throughout. To the first class l)elong most lathe tools,cold chisels, etc. To the second cla.ss, taps, dies, milling cutlers, etc.When tempering…
Mechanical engineering
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