Related Resources: calculators

Conversion of Hardness-to-Hardness Steels per. ISO 18265 - 2013

Engineering Materials
Strength of Materials and Applications

Conversion of Hardness-to-Hardness Values for Cold Working Steels per. ISO 18265 - 2013

Hardness conversions are no substitute for direct measurements. WARNING - Hardness conversions are no substitute for direct measurements. These tables should be used with caution. Uncertainty values are not included in table data on conversions.

This table calculator presents conversion values for steels for cold working that have been quenched and tempered. These values are based on results of testing carried out on steels as specified in TGL 4393.

For other options select « For other options select icon in calculator

a Brinell hardness values up to 450 HB were determined using a steel ball indenter, those above this value were determined Brinell hardness values up to 450 HB were determined using a steel ball indenter, those above this value were determined with a hardmetal ball. with a hardmetal ball.
b Recalculated in 2012 by interpolation. Recalculated in 2012 by interpolation.
NOTE 1 Values in Values in parentheses are those lying outside the defined range of the standard test method but which may used parentheses are those lying outside the defined range of the standard test method but which may used as estimates.
NOTE 2 If only HV If only HV is given without a number, then most probably HV30 is meant

Hardness conversions available

  • HV - Vicker Hardness
  • HBW - Brinell Scale
  • HRC - Rockwell Scale HRC
  • HRA - Rockwell Scale HRA
  • HR45N - Rockwell Scale HR45N
  • HR30N - Rockwell Scale HR30N
  • HR15N - Rockwell Scale HR15N
  • HRB - Rockwell Scale HRB
  • HRF - Rockwell Scale HRF
  • HR45T - Rockwell Scale HR45T
  • HR30T - Rockwell Scale HR30T
  • HR15T -Rockwell Scale HR15T

Cold working steels tested that define hardness table calculator values

Steel grade Steel grade
(as in TGL 4393)
Steel grade (as in Steel grade (as in ISO 4957 ISO 4957)
Material no.
Name
85CrMo7.2
1.2304
85CrMo7
UR85CrMo7.2
1.2304
85CrMo7
90MnV8
1.2842
90MnCrV8
101Cr6
1.3514
101Cr6LW
UR101Cr6
1.3505a
100Cr6
125CrSi5
1.2109
125CrSi5
X125WMo6.
1.3344a
S6-5-3
210Cr46
1.2080
X210Cr12
210CrW46
1.2436
X210CrW12

a Chemical composition roughly equivalent to that specified in TGL 4393.

Uncertainty curves to be used for conversion are avaialble in ISO ISO 18265, Appendix C.

Source:

  • ISO 18265:2013, Metallic materials — Conversion of Metallic materials - Conversion of hardness values

Related: