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Hardness Conversion Chart (HRA-HRC) - General Carbide
www.generalcarbide.comRockwell "A" Rockwell "C" 91.8-92.8 79.5-81.5 91.5-92.5 79.0-81.0 90.5-91.5 77.0-79.0. Author: Trisha Hineman Created Date: 1/17/2011 3:19:28 PM