hardness number


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Related to hardness number: Rockwell Hardness Number

hardness number

A number on a calibrated scale indicating the relative hardness as determined by a particular system of testing, e.g., Knoop, Mohs, Rockwell, Vickers hardness tests. A steel ball or diamond point is applied with a known variable load for a determined period of time to produce an indent whose depth or diameter can be measured.
See also: number
References in periodicals archive ?
Minimum five indentations were obtained at various loads and the average hardness number was calculated for all the polyblends.
Tensile strength had dropped to 28,000 psi and Brinell hardness numbers averaged 170.
Most familiar to cast iron producers and users is the Brinell hardness number (HB), followed closely by the Rock-well [(R.
The diameter of the resultant impression is then measured with a microscope and a Brinell hardness number (Bhn) calculated according to a predetermined formula.
According to the ASTM D3363, two hardness numbers (scratch hardness, pencil hardness) could be reported for each specimen in the pencil hardness test.