High-accuracy Standard Blocks for Hardness

Yamamoto test blocks represent the premier test blocks in the industry and are the de facto standard for reference. Yamamoto Test Blocks Yamamoto test blocks are reference materials, standardized to determine the average hardness of the block surface. The resulting certified value provides a reference number and tolerance that should be met during hardness tester verification to ensure compliance with performance standards. Yamamoto test blocks are calibrated in accordance with ASTM E18-00 section C using Rockwell HRC standard reference materials

Yamamoto Test Blocks Features and Benefits:
- Regular, Superficial and Special Blocks
- High precision, precision hardness tolerance
- Certified blocks traceable to NIST
- Calibrated in accordance with ASTM E18-00 section C using NIST Rockwell HRC standard reference material