42 Mohs to HRC

42 Mohs = 0.41 HRC

MohsHRC
36 Mohs0.35
38 Mohs0.37
40 Mohs0.39
420.41
44 Mohs0.43
46 Mohs0.45
48 Mohs0.47

42 Mohs = 0.41 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