Question 1

What is 378.5 HRB in HV?

Accepted Answer

378.5 HRB = 681.3 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 681.3 HV in HRB?

Accepted Answer

681.3 HV = 378.5 HRB.

HRB	HV
363.5 HRB	654.3
368.5 HRB	663.3
373.5 HRB	672.3
378.5	681.3
383.5 HRB	690.3
388.5 HRB	699.3
393.5 HRB	708.3

378.5 HRB to HV

Formula (approximate)