The metal element of Corten A weathering steel sheetWeathering steel, also known as atmospheric corrosion-resistant steel, is a low-alloy steel made by adding a certain amount of alloying elements to ordinary steel. The main alloying components are Cu, P, Cr, Ni and other elements. CortenA weathering steel is characterized by its ability to resist corrosion under natural atmospheric conditions. Steel corrosion is one of the main causes of steel structure damage, and corrosion loss is also considerable. It is reported that North America’s annual corrosion loss is also considerable. It is reported that North America’s annual steel loss due to corrosion accounts for 20% of the annual output. The annual corrosion loss in Canada reaches 600 million US dollars. The way people solve the anti-corrosion problem of large steel structures is generally to increase the corrosion margin and apply anti-rust paint. The former will cause waste of materials, and the latter will require regular maintenance recoating, which will increase maintenance costs and sometimes affect normal use.
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Corten A weathering steel and
09MnCuPTi sheetIn 1967, two P61-type test boxcars were manufactured with two grades of weathering steel such as 09MnCuPTi steel sheet produced by BBN steel. After 18 years of operation, inspections during plant repairs in 1985 found that the corrosion resistance of the two types of weathering steels was 2 to 3 times higher than that of ordinary carbon steels. The Ministry of Railways has decided to use weathering steel for all new vehicles from 1990, which makes weathering steel the main material for railway vehicle manufacturing. Due to the use of this material, the vehicle maintenance cycle is prolonged and the cut-off rate is reduced, which to a certain extent alleviates the current contradiction of railway capacity shortage and insufficient vehicles.
