rockwell hardness test procedure

rockwell hardness test procedure - After 15 seconds the...

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Rockwell Hardness ASTM D785, ISO 2039 Scope: The Rockwell Hardness test is a hardness measurement based on the net increase in depth of impression as a load is applied. Hardness numbers have no units. The higher the number in each of the scales, the harder the material. Test Procedure: A standard specimen is placed on the surface of the Rockwell Hardness tester. A minor load is applied and the gauge is set to zero. The major load is applied by tripping a lever.
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Unformatted text preview: After 15 seconds the major load is removed. The specimen is allowed to recover for 15 seconds and then the hardness is read off the dial with the minor load still applied. Specimen size: A standard specimen of 6.4mm (0.25 in) thickness is either molded or cut from a sheet. Data: The hardness is read directly from the dial. The higher the number in each scale, the harder the material. Equipment Used: Rockwell Hardness Tester...
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This note was uploaded on 05/26/2011 for the course CGN 3501 taught by Professor Mang during the Fall '10 term at University of Florida.

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