Corten steel, also known as weathering steel or atmospheric corrosion-resistant steel, is often referred to by its trademarked name COR-TEN steel (sometimes written as Corten steel). The name COR-TEN refers to the two distinguishing properties of this type of steel, Corrosion resistance and tensile strength.Corten steel plate or sheet, is a type of alloy steel plate. When uncoated and exposed to the weather, Corten steel plates rusts, and the rust forms a protective coating on the external surface which slows the rate of future corrosion, thus preventing the steel material from acidic environments and harsh weather conditions. Note: minor rust spotting may occur on light coloured surfaces during the initial weathering in process.

Due to the atmospheric corrosion resistance, excellent strength, durability and aesthetically-appealing appearance of corten steel plate, it is used wider and wider in varies of field.