Do you know stainless steel? It's one of the most common material used in dental drill. Stainless steel is a metallic material which is characterized by its special purity. There are alloyed and unalloyed steel, but only the alloyed variant is also stainless. In stainless steel, it must be enriched with alloying elements such as titanium, niobium or chromium in addition to iron. Chromium (Cr) is the corrosion resistance of stainless steel and should have a minimum content of 12% and an extremely low carbon content. The chromium content creates a layer on the material surface which permanently protects against water and moisture.