Most of the requirements are to maintain the original appearance of the building for a long time. In determining the type of stainless steel to be selected, the main consideration is the aesthetic standards required, the location of the corrosive atmosphere and the cleaning system to be used. However, other applications are increasingly looking for structural integrity or impermeability. Such as the roofs and side walls of industrial buildings. In these applications, the owner of the construction cost may be more important than the aesthetic, the surface is not very clean can be. The use of 304 stainless steel in a dry indoor environment is quite effective.
However, in the countryside and the city in order to maintain its appearance in the outdoors, you need regular cleaning. In polluted industrial areas and coastal areas, the surface will be very dirty, or even rust. But to get the aesthetic effect of outdoor environment, you need to use nickel-containing stainless steel. Therefore, 304 stainless steel is widely used in curtain wall, side wall, roof and other construction purposes, but in the corrosive serious industrial or marine atmosphere, the best use of 316 stainless steel. Several design guidelines include 304 and 316 stainless steel.