51.5 Mohs to HRC

51.5 Mohs = 0.5 HRC

MohsHRC
36.5 Mohs0.36
41.5 Mohs0.41
46.5 Mohs0.46
51.50.5
56.5 Mohs0.55
61.5 Mohs0.6
66.5 Mohs0.65

51.5 Mohs = 0.5 HRC

Formula (approximate)

1 HRC ≈ 10.2 HV · 1 HRB ≈ 1.8 HV · 1 Mohs ≈ 0.1 HV — approximate; real conversions vary by material per ASTM E140