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Harold P. (Harold Phillips) Manly
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CHAPTER I METALS AND THEIR ALLOYS—HEAT TREATMENT THE METALS Iron.—Iron, in its pure state, is a soft, white, easily worked metal. It is the most important of all the metallic elements, and is, next to aluminum, the commonest metal found in the earth. Mechanically speaking, we have three kinds of iron: wrought iron, cast iron and steel. Wrought iron is very nearly pure iron; cast iron contains...
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