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.
63-65
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.
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.
Approx 37.8 Rockwell "c" scale
You can check out the related link below.
Rockwell hardness
It depends on the type of scale.... rockwell A,B,C..... and the type of diamond used if you have that data, use this chart. http://www.carbidedepot.com/formulas-hardness.htm
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.
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.
63-65
Hardness of metal is determined by the carbon content. HRC is the Rockwell Hardness Scale. A hardness of 55-58 is not very hard compared to carbon steel.
Do you mean adjustable shoulder harness, used for carrying a knife under a coat, or did you did mean "hardness", which usually refers to the Rockwell Scale that determines how hard or soft the metal of a blade is.
The element neon has no hardness on either moh's hardness scale or rockwell scale unless it is frozen. These scales measure only solids.