BHN, HV, HRB and HRC Hardness Conversion Chart

Here is a general BHN, HV, HRB and HRC Hardness Conversion Chart for reference.

BHN,HV,HRB and HRC Hardness Conversion Table
Tensile Strength (N/mm²)	Brinell Hardness BHN (HB)	Vickers Hardness （HV）	Rockwell Hardness (HRB)	Rockwell Hardness (HRC)
275 – 300	85	85	52	–
330 – 350	100	105	60	–
380 – 400	115	120	68	–
410 – 430	125	130	72	–
500 – 520	150	155	80	–
580 – 600	175	180	88	–
650 – 680	200	205	93	10
720 – 750	225	230	97	15
800 – 830	250	255	100	20
880 – 910	275	280	–	25
950 – 980	300	305	–	30
1030 – 1060	325	330	–	35
1100 – 1130	350	355	–	38
1170 – 1200	375	380	–	41
1240 – 1270	400	405	–	44
1310 – 1340	425	430	–	47
1380 – 1420	450	455	–	50
1450 – 1490	475	480	–	52
1520 – 1560	500	505	–	54
1670 – 1710	550	555	–	58
1820 – 1860	600	605	–	61
1970 – 2020	650	655	–	64
2120 – 2170	700	705	–	67

HRB is typically used for softer materials (e.g., annealed steels, brass, aluminum).
HRC is used for harder materials (e.g., heat-treated steels).
BHN (HB) and HV are more universal but require different test methods (indenter & load).
Conversions are not exact—always refer to material-specific standards (ASTM E140, ISO 18265) when precise values are needed.

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