Hardness-Standard Pieces（Hardness Classification：HRC）

Hardness test blocks are a type of gauge used when testing hardness testers in the industrial field. The hardness of a fixed value is displayed according to the determined hardness standard. There are hardness test blocks corresponding to various hardness such as HMV, HRA, HV, HBW, and they are used according to the test items. Since the material of the test blocks is required to have a certain hardness and not to change over time, alloy tool steel JIS SKS3, which has more abrasion resistance and heat resistance than SK carbon tool steels, is used. There are also a shock test blocks that measure the absorbed energy, and the material used is ultra clean steel equivalent to SNCM439. In addition, Hardnester that measures hardness with a touch measure can speed up work. Accurate hardness measurement is possible even with irregularly processed products and complicated shapes, and it is also used for local inspection.