B Scale Rockwell Test Block - 55 Range is being manufactured due to worldwide material shortages in accordance with ASTM E18 and ISO 17025 standards for quality and uniformity with the highest quality aircraft aluminum.
Each test block has been calibrated on a hardness tester whose accuracy has been verified using N.I.S.T. traceable load and depth measuring devices. The test blocks are made from only the highest quality material to ensure complete uniformity and repeatability. They are hand lapped and polished to a mirror finish. Each test block is calibrated and marked with its own unique serial number along with the serial number of the indenter or penetrator in the calibration set that they were produced with. Each block comes with the latest test block certification requirements from ASTM and NIST, providing you with the most comprehensive calibration test block available.
