Free Hardness Conversion Chart
Our free hardness conversion chart has details of roundness corrections and minimum thickness requirements.
The hardness conversions include:
- HRA, HRB, HRC, HRD, HRF
- HR15N, HR30N, HR45N
- HR15T, HR30T, HR45T
- HV
- HB
All conversions are in accordance with ASTM E140.
Download hardness chart PDF 
