18 Mohs to HRC

18 Mohs = 0.18 HRC

MohsHRC
15 Mohs0.15
16 Mohs0.16
17 Mohs0.17
180.18
19 Mohs0.19
20 Mohs0.2
21 Mohs0.21

18 Mohs = 0.18 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