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Hardness scales and range
accord. to standard conversion
tables
Note:
Conversions are acc. to ASTM
E140-12bƐ1(2013), EN ISO
18265-2014, and DIN 50150-2000
(solely table 1, low-alloyed steel).
Conversions into tensile strength
for 98N (10kgf) test load only.
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Vickers HV 10 – ca. 2000
Brinell HB 76 – 618
Knoop HK 87 – 920 (ASTM only)
Rockwell HRB 41 – 105
Rockwell HRF 82,6 – 115,1
Rockwell HRC 20,3 – 68
Rockwell HRA 60,7 – 85,6
Rockwell HRD 40,3 - 76,9 (EN ISO 18265 only)
HR45N 19,9 – 75,4
Tensile Strength MPa (N/mm2) 255 – 2180 (EN ISO 18265 only) |