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 ?
where [H.sub.v] is the hardness number, P is the applied load, and d is the diagonal length measured in micrometer.
First the values of the Knoop hardness numbers (KHN), in kg/[mm.sup.2], at distances 10, 20, 30, 40, 50, 60, 80, 100, 200, and 300 um from the enamel surface were obtained.
The mean Brinell hardness number for the cross section (5.8) of the eastern beech wood specimens studied is smaller than that of beech specimens in the Western Black Sea region (6.35).
The resulting material is rated at 800 VHN (Vickers hardness number).
This means one part tin to 20 parts lead, with a Brinell Hardness Number (BHN) of about 12.
The corresponding Vickers Hardness Number (VHN) values were taken from specially designed tables supplied with Vickers Hardness machine.
All samples of were subjected to Rockwell hardness tester for evaluating hardness using 60-gf load and were denoted as Rockwell hardness number (RHN).
A customer required an 85 minimum Brinell Hardness number (BHN) for an aluminum component sand cast in A356.0 alloy and heat treated to a T6 temper.
Influence of different ceramics on resin cement Knoop Hardness Number. Oper Dent.