Hardness Conversion – Measurement Range

The hardness conversion is material specific, caused by the fact that there is no clear physical relationship between the various hardness test methods. Care must be taken to select the proper conversion table to be used.

The Equotip 3, which operates according to the Leeb principle invented by Proceq, offers hardness conversion to all common scales for a number of materials. In addition, the option for a custom hardness conversion for uncommon alloys is implemented conveniently permitting the further tuning of the conversion to also cover special materials. Already existing quality management systems which involve traditional hardness measurements can therefore benefit from the Equotip 3 by means of conversion functions. 

 

Fields of applicationD/DCDLSEGC
Steel and
cast steel







HV81-95580-950101-96484-121181-1012
HB81-65481-646101-64083-68690-64681-694
HRB38-10037-10048-100
HRC20-6821-6822-7020-7220-70
HRA61-8861-88
HS30-9931-9728-10429-10330-102
σ1275-2194275-2297340-2194283-2195305-2194275-2194
σ2616-1480614-1485615-1480616-1479615-1479
σ3449-847449-849450-846448-849450-846
Cold work
tool steel
HV80-90080-905104-92482-100998-942
HRC21-6721-6722-6823-7020-67
Stainless steel


HV85-802119-93488-668
HB85-655105-65687-661
HRB46-10270-10449-102
HRC20-6221-6420-64
Cast iron
lamellar
graphite
GG

HB90-66492-326
HV90-698
HRC21-59
Cast iron,
nodular
graphite
GG

HB95-686127-364
HV96-724
HRC21-60
Cast aluminium
alloys

HB19-16420-18720-18423-17619-16821-167
HV22-19321-19122-19622-198
HRC24-8524-8524-8623-85
Copper/
zinc-alloys
(brass)
HB40-173
HRB14-95
CuAI/
CuSn-alloys
(bronze)
HB60-290
Wrought
copper alloys,
low alloyed
HB45-315
Vickers: HVShore: HS
Brinell: HBTensile Strength Rm N/mm2: σ1, σ2, σ3
Rockwell: HRB, HRC, HRA

Please feel free to contact Proceq for more information on hardness conversion.