Category Archives: Hardness

Hardness conversion table

Hardness conversion table

Vickers
HV
Rockwell E
Hre
Rockwell C
Hrc
Examples
12568.5-
12770.0-
13071.0-
13272.0-
13573.0-
13774.0-
14075.0-
14376.5-
14777.5-
15078.5-
15379.5-
15681.0-
15982.0-
16383.0-
17887.0-
18388.0-
18889.0-
19290.0-
19690.5-
20291.5-
20793.0-
21293.5-
21894.5-
22295.5-
22896.5-
23497.519.0
24198.020.5
24799.021.6
253100.022.8
261101.024.1
269-25.4
276-26.5
284-27.6
292-28.7
301-29.9
310-31.0
319-32.1
329-33.2
339-34.3
350-35.4
360-36.6
372-37.8
383-39.1
396-40.4
410-41.8
425-43.1
440-44.5
457-45.8
474-47.2
495-48.7
516-50.3
535-51.4
553-52.5
560-53.0
577-54.0
595-55.0
613-56.0
633-57.0
653-58.0
674-59.0
697-60.0
720-61.0
746-62.0
772-63.0
800-64.0
832-65.0
-- -

Conversion from one hardness scale to another is only an approximate process. Differents types of hardness tests do not all measure the same combination of material properties. Because of the wide range of variation among different materials, it is not possible to state confidence limits for the errors in using a conversion chart.

Mitutoyo hardness test

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