39 Mohs to HRC

39 Mohs = 0.38 HRC

MohsHRC
33 Mohs0.32
35 Mohs0.34
37 Mohs0.36
390.38
41 Mohs0.4
43 Mohs0.42
45 Mohs0.44

39 Mohs = 0.38 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