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Rockwell C scale
Rockwell hardness
RC stands for Rockwell Hardness C scale; the different letters A,B,C etc. are based on different loads and indenters for measurement. C scale is typical for steels, while B scale is typical for aluminum. There are conversion tables for these if needed.
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HRC stands for Hardness Rockwell C scale. There are different scales; C is probably the most common for hardened materials. See the related link for more information.
Approx 37.8 Rockwell "c" scale
Diamond is more than 1000 times harder than quartz, which is in the 80 range in the Rockwell C. Diamond cannot be measured on the Rockwell C scale. A diamond pyramid is actually used in the Rockwell C test, which would be inconclusive.
Rockwell C scale
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Rockwell hardness
Its basically like sonar. Sending a signal and bouncing it back through the material will vary in time it takes to receive the PING. The longer it takes to receive the PING, the harder the material.Another Answer:The common hardness test is the Indent Test. This test is used in relation to the Rockwell Hardness Scale. The instrument holds a probe called an Indenter. The machine is like a press that pushes the Indenter into the material at a known force. The depth of the indentation made in the material is a measure of its hardness on the Rockwell Hardness Scale.
RC stands for Rockwell Hardness C scale; the different letters A,B,C etc. are based on different loads and indenters for measurement. C scale is typical for steels, while B scale is typical for aluminum. There are conversion tables for these if needed.
once you put the material on the scale, a magical phenomenon happens and the weight will appear on the digital screen of the scale!
The Mohs scale of mineral hardness is named after Friedrich Mohs, who developed it. The Rockwell scale of metal hardness is named after Hugh and Stanley Rockwell, who created the machine that measures it. Hugh and Stanley Rockwell aren't directly related to each other. The Shore Durometer scale for measuring the hardness of elastomeric materials like rubber is named after Albert Shore, who invented the measuring device called the durometer.
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By creating the hardest material possible. The harder a material is the better it's edge holding abilities, and thinness of edge. Some knives can reach a micron thick. See the Rockwell Hardness Scale- http://en.wikipedia.org/wiki/Rockwell_scale
the mohs hardness scale