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  1. Rockwell B to C Hardness Conversion Chart

  2. Brinell and Rockwell Hardness Conversion Table Chart - Engineers Edge

  3. Hardness comparison - Wikipedia

  4. Steel Hardness Conversion Table - Steel Express

  5. Rockwell scale - Wikipedia

  6. Hardness Conversion Chart | Precision Grinding, Inc. - PGI Steel

  7. Hardness Conversion Chart - provides values for Brinell, Rockwell

  8. Hardness Conversion Chart: HLD, HRC, HRB, HV, HB, HSD

  9. Hardness Conversion Chart - Rockwell "B" Hardness Range