Brinell Hardness Test Block BHN / HB

A Brinell Hardness Test Block (BHN/HB) is a standardized, calibrated metal reference block used to verify and calibrate Brinell hardness testing machines, ensuring accuracy. These blocks, often made of steel or aluminum, are produced to meet ASTM E10 or ISO 6506 standards. They provide a consistent reference point to maintain testing integrity