1, high temperature corrosion resistance: doctors need to sterilize tools in surgery, high temperature sterilization is very high for the material requirements. Food grade stainless steel is difficult to process: stainless steel hardness, processing difficulty, the need for specialized processing equipment and processes.
2, biocompatibility: in the medical field, stainless steel materials need to be in contact with human tissue. Food grade stainless steel is more expensive: stainless steel is more expensive to produce, so it is more expensive.