Yamamoto Scientific Tool Laboratory Hardness standard HRB-S90

High-precision hardness standards are ISO/JIS-compliant standard test pieces for indirect verification of hardness gauges, which are used all over the world due to their standard values based on the international standard of hardness uniformity, which was developed in Japan and is recognized worldwide. Compliant with JIS/ISO, high-precision hardness standards pursue "zero variation" and have the motto of "measure with peace of mind", and are widely trusted and highly evaluated both domestically and internationally for 1. high uniformity, 2. stability, and 3. international and universal standard values.