standard Knoop hardness test block microhardness tester calibration

The standard Knoop hardness test block used to ensure the accuracy of Knoop microhardness testers. Crafted from high-quality materials and meticulously calibrated, these hardness calibration blocks feature clearly marked hardness values ，The knoop microhardness tester  in metallographic laboratory and Metallurgy, machinery manufacturing and other industries applications wide range of applications. Ideal for measuring thin materials, coatings, and small areas, Knoop hardness blocks support compliance with international testing standards. Their use guarantees consistent, precise measurements, making them essential for quality control, research, and instrument reliability in microhardness testing.