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Rockwell hardness
(redirected from Rockwell scale)

    Also found in: Wikipedia 0.01 sec.
Rockwell hardness [′räk‚wel ′härd·nəs]
(engineering)
A measure of hardness of a material as determined by the Rockwell hardness test.
Rockwell hardness
Rockwell hardness tester
A measure of the resistance of a material to indentation; determined by use of a machine which presses a steel ball or a spheroconical ball indentor into the material under arbitrarily fixed test conditions; expressed by the Rockwell hardness number—the higher the number, the harder the material.
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Since many of us do not have access to these legendary figures we have to rely on mundane practices such as checking the Rockwell scale.
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To help machine operators avoid errors, the guide covers common problems, such as using the correct Rockwell scale, surface preparation, speed of testing, machine verification and environmental factors.
NEW NIST PRACTICE GUIDE ON ROCKWELL HARDNESS TESTING AVAILABLE by Journal of Research of the National Institute of Standards and Technology
 
 
 
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