What is the steel blue steel? 'Blue steel strip' - you should know Precision stainless steel - Spring stainless steel belt | stainless steel spring | 301 superhard material

Blue steel, refers to the surface with a blue-black appearance, antirust function, and thus has a protective effect of steel. Blue steel produced by the process is a kind of metal passivation process, the process is also known as the high temperature oxidation, its essence is through the chemical reaction, in the steel surface to form a uniform density, has certain thickness, strong adhesion, corrosion resistance, good blue-black oxide film, which have the effect of beautification and protection of the workpiece tags: blue steel with 300 stainless steel belt