Buehler 22 43.33 HRC - 1.0 Hardness Standard Test Reference Block

The Buehler Wilson 22 43.33 HRC Hardness Standard Test Reference Block is a precision calibration reference used to verify and calibrate Rockwell C hardness testers in industrial and laboratory workflows. It carries a verified hardness rating of 43.33 HRC on the Rockwell C scale and a Block Identification of 22, providing a repeatable standard for hardness verification, tester calibration, and inspection verification during material testing. Designed for mounting as a tester calibration reference, this block supports use with Rockwell hardness testing equipment, laboratory inspection systems, and quality control operations that require reliable calibration performance in both laboratory and industrial settings. Common replacements include the Buehler Wilson 43 HRC Test Block, Mitutoyo Rockwell Hardness Test Block, and Instron Wilson Hardness Calibration Block.