Hardness reference blocks, also referred to as test plates, are used for indirect calibration methods and periodic daily inspection of hardness testing instruments.

The use of high quality, consistent hardness reference blocks with minimal hardness deviation is essential to ensure the operational reliability of hardness testing machines. To ensure traceability to the hardness standard, the reference blocks must have a minimal hardness deviation and be calibrated with minimal measurement uncertainty.

UnitedTest offers a full line up of hardness test blocks and other accessories for your metal hardness testing needs. Certified Test Blocks are a requirement as a reference material for any type of hardness testing. At UnitedTest, we understand the importance of a Test Block to ensure the accuracy of your hardness testing procedures. Industry standards, such as ASTM, specify that a test block must be used every day that your testing apparatus is in operation as well as whenever an indenter, anvil or load force is changed.

UnitedTest offers most Brinell, and Rockwell blocks in stock. We also carry Knoop, and Vickers Micro blocks, and heavy load Vickers blocks. To complete the line of accessories, we also carry a full line of certified indenters for Rockwell, Brinell, Vickers and Knoop testing and test anvils which are compatible with a wide majority of hardness testers.  Vickers hardness reference blocks ISO 6507