Question 1

What is 55.5 HRB in HV?

Accepted Answer

55.5 HRB = 99.9 HV. Use the converter on this page to convert to other hardness units instantly.

Question 2

How do you convert HRB to HV?

Accepted Answer

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. Multiply your HRB value by the appropriate factor to get HV, or use the interactive converter above.

Question 3

What is 99.9 HV in HRB?

Accepted Answer

99.9 HV = 55.5 HRB.

HRB	HV
40.5 HRB	72.9
45.5 HRB	81.9
50.5 HRB	90.9
55.5	99.9
60.5 HRB	108.9
65.5 HRB	117.9
70.5 HRB	126.9

55.5 HRB to HV

Formula (approximate)