Require the use of stainless steel is most typical uses of long-term keep the building the original appearance. In determining the type to use stainless steel, the main consideration is the location of the atmospheric corrosion of aesthetic standards, requirements and the cleaning system. However, a growing number of other applications just seek structural integrity or impermeable. For example, the roof and side wall of industrial buildings. In these applications, the owner of the construction costs may be more important than the aesthetic, the surface is not very clean can. The use of 304 stainless steel in dry indoor environment is quite good. However, in the country and the city to maintain its appearance in the outdoors, they need frequent cleaning. In the industrial pollution and coastal areas, the surface will be very dirty, even rust. But to get the aesthetic effect of outdoor environments, would need to use nickel-containing stainless steel. So, 304 stainless steel is widely used in curtain wall, side walls, roof and other construction purposes, but the erosion of serious industrial or marine atmosphere, the best use of 316 stainless steel. Stainless steel door.