5.5 HV to HRC

5.5 HV = 0.54 HRC

HVHRC
2.5 HV0.25
3.5 HV0.34
4.5 HV0.44
5.50.54
6.5 HV0.64
7.5 HV0.74
8.5 HV0.83

5.5 HV = 0.54 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