| THEORY & FORMULAE |
The hardness of a work material is primary parameter in machining operations. Hardness is essentially the resistance to cutting, scratching or abrasion. Hardness is measured by four main methods: Brinell, Rockwell, Vickers and Scleroscope, each with its own unique scales and ranges.
It is common practice to convert hardness numbers from the other methods to the equivalent Brinnel numbers. To this end, Isakov has presented a series of semi-analytic conversion equations, which is implemented here. The Brinell number is assumed measured using the Tungsten carbide ball/3000 kgf load, the Vickers method using the 10kgf/pyramidic diamond, the Rockwell C number using the 150kgf/Brale penetrator, and Rockwell B using 100kgf penetrator.