PROPERTIES, IDENTIFICATION, AND HEAT TREATMENT OF …

TC 9-524 Chapter 2 PROPERTIES, IDENTIFICATION, ANDHEAT TREATMENT OF METALSGENERALPURPOSEThis chapter contains basic information pertaining toproperties and identification of metal and heat -treatingprocedures used for metals. For more specific information onmetal and heat -treating techniques, refer to TM CLASSIFICATIONAll metals may be classified as ferrous or nonferrous. Aferrous metal has iron as its main element. A metal is stillconsidered ferrous even if it contains less than 50 percent iron,as long as it contains more iron than any other one metal. Ametal is nonferrous if it contains less iron than any metals include cast iron, steel, and the various steelalloys, The only difference between iron and steel is the carboncontent. Cast iron contains more than 2-percent carbon, whilesteel contains less than 2 percent. An alloy is a substancecomposed of two or more elements. Therefore, all steels arean alloy of iron and carbon, but the term alloy steel normally refers to a steel that also contains one or more otherelements.

needing very little in the way of time, equipment, and experience. Rockwell Hardness Test This test determines the hardness of metals by measuring the depth of impression which can be made by a hard test point under a known load. The softer the metal, the deeper the impression. Soft metals will be indicated by low hardness numbers.

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  Treatment, Heat, Equipment, Heat treatment

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