Question 1

What is 77.5 HRB in HV?

Accepted Answer

77.5 HRB = 139.5 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 139.5 HV in HRB?

Accepted Answer

139.5 HV = 77.5 HRB.

HRB	HV
62.5 HRB	112.5
67.5 HRB	121.5
72.5 HRB	130.5
77.5	139.5
82.5 HRB	148.5
87.5 HRB	157.5
92.5 HRB	166.5

77.5 HRB to HV

Formula (approximate)