Question 1

What is 128.5 HRB in HV?

Accepted Answer

128.5 HRB = 231.3 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 231.3 HV in HRB?

Accepted Answer

231.3 HV = 128.5 HRB.

HRB	HV
113.5 HRB	204.3
118.5 HRB	213.3
123.5 HRB	222.3
128.5	231.3
133.5 HRB	240.3
138.5 HRB	249.3
143.5 HRB	258.3

128.5 HRB to HV

Formula (approximate)