Not all materials can be precision machined, and some materials with excessive hardness exceeding the hardness of the machined parts may damage the parts. Therefore, unless these materials are parts made of special materials or laser cut, they are not suitable for the processing of precision parts.

The materials used for precision machining of general parts are divided into two categories: metallic materials and non-metallic materials.

In terms of metal materials, stainless steel has the highest hardness, followed by cast iron, copper, and finally aluminum, while the processing of ceramics, plastics, and other materials belongs to the processing of non-metallic materials.

Firstly, there is a requirement for the hardness of the material. In some cases, the higher the hardness of the material, the better. Just limited to the hardness requirements of the machining parts, the material cannot be too hard. If it is harder than the parts, it will cause the inability to process.

Secondly, the material should be moderately soft and hard, at least one level lower than the hardness of the components. At the same time, it also depends on the purpose of the processing components and the rational selection of materials for the parts.

In short, precision machining still has some material requirements, and not all materials are suitable for processing. For example, materials that are too soft or too hard do not require processing, while materials that are too hard cannot be processed.