Hardness testers are mainly used for ferrous metals, non ferrous metals, IC wafers, surface coatings, and laminated metals; Glass, ceramics, agate, gemstones, thin plastic, etc; Hardness testing of the depth and gradient of the carbonized and hardened layer under load.

Impact of steel ball indenter: When the diameter of the steel ball indenter with Brinell hardness increases, its hardness value decreases, and vice versa. If the steel ball used is small and made of steel, when applying a load, the steel ball itself will also undergo elastic deformation and plastic deformation, which has a significant impact on low hardness value errors. Therefore, measurements must be made under standard indenter diameter conditions.