However, other applications increasingly seek only structural integrity or water impermeability. For example, roofs and side walls of industrial buildings. In these applications, the owner's construction cost may be more important than aesthetics, and the surface is not very clean.
Different materials of stainless steel are used in different ways. 304 stainless steel works reasonably well in dry indoor environments. However, to maintain its appearance outdoors in rural and urban areas, frequent cleaning is required. In heavily polluted industrial and coastal areas, the surface can be very dirty and even rust. However, for an aesthetic effect in an outdoor environment, nickel-containing stainless steel is required.
The advantages of using stainless steel in structural applications are now fully recognized. There are several design guidelines that include 304 stainless steel and 316 stainless steel. Because the "duplex" stainless steel 2205 combines good atmospheric corrosion resistance with high tensile and elastic strengths, this steel is also included in European guidelines.
In fact, stainless steel is manufactured in a full range of standard metal shapes and sizes, and many special shapes are also available. The most commonly used products are made from sheet and strip, but also special products are produced from medium and heavy plates, for example, in the production of hot-rolled structural steel and extruded structural steel. There are also round, oval, square, rectangular and hexagonal welded or seamless pipes and other forms, including profiles, bars, wires and castings.
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