Indentation hardness evaluates a material's resistance to change when compressed. Workers compress the material with machines to measure indentation hardness. They then estimate the amount of indentation left on the material. A wider indentation generally means a tougher substance. The method for measuring indentation hardness varies depending on the scale used. There are four different scales to pick from when measuring indentation hardness. Brinell Scale - The Brinell scale, invented by Johan August Brinell in 1900, was the first metal hardness tester scale used by engineers and workers. An indenter is used to penetrate the target substance in order to conduct a Brinell test. People prefer using Brinell scale when determining the UTS of steel. Rockwell Scale - Hugh and Stanley Rockwell developed the Rockwell scale in the early 1900s. This scale contrasts the indentation caused by a heavy load with the indentation caused by a light load. The Rockwell test protects the durabil...
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