Not what materials can be precision mechanical parts processing, some materials hardness exceeds the hardness of machine parts, it is possible to crash machine parts, so these materials are not suitable for precision machining, unless it is a special material made of machine parts or laser cutting.

Materials used for precision machining are divided into two categories, metallic materials and non-metallic materials. For metal materials, stainless steel has the greatest hardness, followed by cast iron, followed by copper, and finally aluminum. Non-metallic materials, such as ceramics, plastics.

1, the first is the material hardness requirements, for some occasions, the higher the hardness of the material, the better, but only the hardness requirements of the processing machine, the processed material can not be too hard, if it is harder than the machine can not be processed.

2, secondly, the material hardness is moderate, at least one grade lower than the hardness of the machine, but also depends on the role of the processed equipment is what, in order to achieve a reasonable choice of machine parts of the material.

In short, there are still some requirements for materials for precision machining, and not all materials are suitable for processing, such as materials that are too soft or too hard, too soft do not need processing, and too hard materials are not processed.

Therefore, we must pay attention to the density of the material before processing, if the density is too large, the equivalent of hardness is also very large, if the hardness exceeds the hardness of the machine tool (lathe tool), it can not be processed, not only will damage the parts, but also cause danger, such as the turning tool flying out to hurt people. Therefore, in general, for the processing of precision mechanical parts, the material material should be lower than the hardness of the machine tool, so that it can be processed.