RCH meaning in Academic & Science ?

Answer: What is Rockwell hardness test mean?

The Rockwell scale is a hardness scale based on indentation hardness of a material. The Rockwell test measuring the depth of penetration of an indenter under a large load (major load) compared to the penetration made by a preload (minor load). There are different scales, denoted by a single letter, that use different loads or indenters. The result is a dimensionless number noted as HRA, HRB, HRC, etc., where the last letter is the respective Rockwell scale (see below).When testing metals, indentation hardness correlates linearly with tensile strength.

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Royal College of Health	Academic & Science
Rockwell hardness test	Academic & Science
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