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Rockwell Hardness


How Does It Work?
A Rockwell hardness indenter (a ball made out of tungsten carbide or steel of varying diameter or a conical diamond indenter, as determined by the type of Rockwell test and Rockwell scale being performed) is brought into contact with the material under a “pre-load” (usually 10kg for standard tests). The load is then increased to the test load (usually 150 kg for HRC and 100 kg for HRB standard tests) and held for a pre-determined “dwell time” (usually 10 seconds for standard tests). The load is then decreased to the pre-load and the difference in the depth of the indentation between the initial and final pre-load positions is determined. This depth is then converted into a Rockwell hardness (HR).
When should it be used?

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KnightHawk Engineering, Inc.
400 Hobbs Rd
League City, TX 77573

(281) 282-9200 telephone
(281) 282-9333 fax

General Information: hawkwork@knighthawk.com

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