The selection of a suitable Rockwell hardness tester mainly depends on the hardness range and properties of the material. The following are some reference suggestions:

one

For materials with high hardness, such as quenched steel, hard alloys, etc., the Rockwell hardness tester with HRC scale is usually chosen. Because the HRC ruler uses a diamond cone indenter and a larger test force, it can effectively measure such high hardness materials.

two

For non-ferrous metals with lower hardness, such as copper, aluminum and their alloys, as well as annealed and normalized steel, HRB rulers are more suitable. The steel ball indenter and relatively small test force used in the HRB ruler can accurately measure the hardness of such softer materials.

three

If the hardness range of the material is at a moderate level, such as quenched and tempered steel, malleable cast iron, etc., HRF ruler can be considered.

four

For thin sheets, surface hardening layers, or small piece materials, it may be necessary to choose a surface Rockwell hardness tester, such as HR15N, HR30N, HR45N and other scales, which use lower test forces to avoid excessive damage to the material and accurately measure the hardness of thin surfaces or small pieces.

For example, when measuring quenched gears in car engines, due to their high hardness, they should be selected

Rockwell hardness tester with HRC scale; When testing aluminum alloy door and window materials, due to the relatively low hardness of aluminum alloy, using HRB ruler is more suitable.

In addition, the size and shape of the material also need to be considered. If the material is small or irregular in shape, special fixtures or testing methods may be required to ensure accurate measurement. At the same time, the accuracy requirements and practical application scenarios of the measurement should also be considered to select the Rockwell hardness tester that best meets the needs.