Hardness scale: HRA, HRB, HRC, HRD, HRF, HRG. Preliminary test force 10kg. Test force: 60kg, 100kg, 150kg. Load control manual. Min. reading 1HR. Apply to large and heavy steel or iron workpieces...
Hardness scale: HRA, HRB, HRC, HRD, HRF, HRG. Preliminary test force 10kg. Test force: 60kg, 100kg, 150kg. Load control manual. Min. reading 1HR. According to ISO 6508, ASTM E18.