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A Rockwell hardness tester. The Rockwell scale is a hardness scale based on indentation hardness of a material. The Rockwell test measures the depth of penetration of an indenter under a large load (major load) compared to the penetration made by a preload (minor load). [1]
A variety of hardness-testing methods are available, including the Vickers, Brinell, Rockwell, Meyer and Leeb tests. Although it is impossible in many cases to give an exact conversion, it is possible to give an approximate material-specific comparison table for steels .
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Download as PDF; Printable version; In other projects ... The Janka hardness test; The Rockwell scale; The Durometer scale; The Barcol scale; ... Hardness scales may ...
Tests for indentation hardness are primarily used in engineering and metallurgy. The tests work on the basic premise of measuring the critical dimensions of an indentation left by a specifically dimensioned and loaded indenter. Common indentation hardness scales are Rockwell, Vickers, Shore, and Brinell, amongst others.
Therefore hardness can be characterized at many different length scales, from hard materials like ceramics to soft materials like polymers. The earliest work was finished by Bulychev, Alekhin, Shorshorov in the 1970s, who determined that Young's modulus of a material can be determined from the slope of a force vs. displacement indentation curve ...
For cases that are less than 0.015 in (0.38 mm) thick a Rockwell scale cannot reliably be used, so file hard is specified instead. [31] File hard is approximately equivalent to 58 HRC. [32] When specifying the hardness either a range should be given or the minimum hardness specified. If a range is specified at least 5 points should be given. [31]
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