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Rockwell hardness test

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Rockwell hardness test

[′räk‚wel ′härd·nəs ‚test]
(engineering)
One of the arbitrarily defined measures of resistance of a material to indentation under static or dynamic load; depth of indentation of either a steel ball or a 120° conical diamond with rounded point, ¹⁄₁₆, ⅛, ¼, or ½ inch (1.5875, 3.175, 6.35, 12.7 millimeters) in diameter, called a brale, under prescribed load is the basis for Rockwell hardness; 60, 100, 150 kilogram load is applied with a special machine, and depth of impression under initial minor load is indicated on a dial whose graduations represent hardness number.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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References in periodicals archive
Rockwell hardness test or the macro hardness was performed on the specimens which were prepared by using belt grinder.
Property correlations of cast AA 713.0/MWCNT metal matrix composite
Traditionally, the Rockwell hardness test has been used to evaluate peened surfaces.
Shot peen hardness with nanoindentation: Jorge Ramirez of Nanovea tells finishing how how shot peening can alter the mechanical properties of a surface
The six-ounce PUMA Wapiti Stage continues this tradition with its high-grade 440A steel and drop-point blade-each of which bears the distinctive "diamond needle" proof mark of a Rockwell Hardness test; this verifies that the blade is at the exact correct hardness.
PUMA Wapiti stag knife
Customers may ask what the "Rockwell hardness test" figure means; manufacturers may quote it in their literature.
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