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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. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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In a Rockwell hardness test, the indenter's cone angle affects the HRC value. The Rockwell hardness test measures the depth of residual penetration by a steel or diamond cone under fixed load conditions. |
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