"Stainless steel" one word is not only a kind of stainless steel, but said more than one hundred kinds of industrial stainless steel, stainless steel developed for each has a good performance in the specific field of application. The key to success is first to understand the use, and then determine the correct steel. Further details of the stainless steel can see compiled by the NiDI "stainless steel guide" floppy disk.

Fortunately, production technology and application fields of building construction is usually only six. They all contain 17 ~ 22% chromium, good steel containing nickel. Addition of molybdenum can further improve the atmospheric corrosion resistance, especially in chloride-containing atmospheric corrosion resistance.