Machining medical implant components is a highly interdisciplinary discipline that integrates precision engineering, materials science, manufacturing quality, and life sciences. From orthopedic joints and dental implants to spinal system components and micro fixation devices, every feature must be manufactured within extremely tight tolerances, while simultaneously meeting strict requirements for biocompatibility, cleanliness, and long-term stability inside the human body. These demands make medical implant machining one of the most technically challenging and heavily regulated fields in precision manufacturing.

In the fields of new energy, electric vehicles (EVs), aerospace, and high-end industrial equipment, bimetallic material joining has become a key trend in product development. Engineers leverage the distinct properties of different metals—such as the lightweight of aluminum, the high strength of steel, and the electrical and thermal conductivity of copper—to achieve an optimal balance of weight, performance, and cost. However, bimetallic assemblies also present high machining risks and long-term reliability challenges, requiring mature engineering strategies and process control.

In precision metal machining, material selection is the first step to ensuring component performance, machining efficiency, and long-term reliability. Stainless steel is widely used due to its corrosion resistance, mechanical strength, and versatility, yet the characteristics vary significantly across different grades. Choosing the wrong material can lead to machining difficulties, increased tool wear, or even shortened product lifespan. This article compares common stainless steel grades and shares practical selection principles to help engineers and R&D teams make optimal decisions.