312.5 HRB to HV

312.5 HRB = 562.5 HV

HRBHV
297.5 HRB535.5
302.5 HRB544.5
307.5 HRB553.5
312.5562.5
317.5 HRB571.5
322.5 HRB580.5
327.5 HRB589.5

312.5 HRB = 562.5 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