The Rockwell hardness tester utilizes either a steel ball or a conical diamond recognized as a brale and indicates hardness by determining the depth of penetration of the indenter under a known load. This depth is relative to the location under a minor initial load. Hardness is a typical of a material, not a fundamental physical property. It is defined as the confrontation to indentation, and it is determined by measuring the enduring complexity of the indentation. More essentially put, when using a fixed force (load) and a given indenter, the smaller the indentation, the harder the material. The Rockwell hardness test method, as defined in ASTM E-18, is the greatest usually used hardness test method. You must obtain a copy of this normal, read and comprehend the standard totally earlier attempting a Rockwell test. The Rockwell test is commonly easier to achieve, and more perfect than other sorts of hardness testing methods. The Rockwell test process is used on all metals, except in condition where the test metal organization or surface situations would current too much variations; where the indentations would be too large for the use; or where the sample scope or sample shape forbids its use.