Casting properties directly affect the machining quality, the hardness value is an important index of casting processing.

1 Brinell hardness : mainly used for determination of castings, forgings, metal parts, pieces of hot rolling blank and annealing the hardness of HB450, measuring range.

2 Rockwell hardness: HRA is mainly used for high hardness test, determination of hardness above HRC67 materials and surface hardness, such as cemented carbide, nitride steel such as HRA>70, measuring range. HRC is mainly used for steel parts ( such as carbon steel, tool steel, alloy steel, Quenched and tempered ) after the hardness measurement, measuring range HRC20~67.

3 Vivtorinox hardness: used to measure thin plates and workpiece hardness, can also be used for the determination of cyanide carburizing, nitriding, surface hardening workpiece hardness.