Question 1

What is 306.5 HRB in HV?

Accepted Answer

306.5 HRB = 551.7 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 551.7 HV in HRB?

Accepted Answer

551.7 HV = 306.5 HRB.

HRB	HV
291.5 HRB	524.7
296.5 HRB	533.7
301.5 HRB	542.7
306.5	551.7
311.5 HRB	560.7
316.5 HRB	569.7
321.5 HRB	578.7

306.5 HRB to HV

Formula (approximate)