Stainless steel is the most widely used watches material. At present, there are mainly 316 stainless steel and 304 stainless steel. Among them, 316 stainless steel is the case material of medium and high-grade wrist watch. Because of containing molybdenum element, it is more corrosion-resistant than 304, high-grade and expensive than 304 steel. Usually the industry is also called "fine steel".
Generally, the stainless steel behind domestic brand watches is 304 stainless steel. During the use of 304 stainless steel, there is wear and a little rust.