Rockwell scale for specialized applications. There are special scales for measuring case-hardened specimens. Rockwell scale The Rockwell scale is a hardness scale based on indentation hardness of a material. The Rockwell test determines the hardness by measuring the depth of penetration of an indenter under a large load compared to the penetration made by a preload. There are different scales, denoted by a single letter, that use different loads or indenters. The result is a dimensionless number noted as HRA, HRB, HRC, etc., where the last letter is the respective Rockwell scale (see below). When testing metals, indentation hardness correlates linearly with
Ichalkaranji are used in engineering and other manufacturing industries, engineering institutes and research institutes for analysis. These measuring instruments are marketed in India as well as some other countries. Measuring instruments manufactured in city by varies companies include compression testing machines, torsion testing machines, horizontal chain and rope testing machines, spring testing machine, impact testing machine, Erichsen testing machines, universal testing machines, Rockwell scale hardness tester, Brinell scale hardness tester, and computerised Vickers hardness test. The city's economy. driven by the engineering goods manufacturing industry (which has been around since the 1950s). Several automotive component manufacturers have plant's in or around