277.5 HRB to HV

277.5 HRB = 499.5 HV

HRBHV
262.5 HRB472.5
267.5 HRB481.5
272.5 HRB490.5
277.5499.5
282.5 HRB508.5
287.5 HRB517.5
292.5 HRB526.5

277.5 HRB = 499.5 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