258.5 HRB to HV

258.5 HRB = 465.3 HV

HRBHV
243.5 HRB438.3
248.5 HRB447.3
253.5 HRB456.3
258.5465.3
263.5 HRB474.3
268.5 HRB483.3
273.5 HRB492.3

258.5 HRB = 465.3 HV

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