ASTM A242 Type 2 weathering steel plates performance

Steel corrosion is a common and serious problem, the atmospheric corrosion losses accounted for about half of all corrosion losses to the national economy. According to statistics from some developed countries, the losses caused by steel structure corrosion accounting for 2%~ 4% of the whole national economic losses. At present, the economic loss caused by corrosion of steel structure has been up to hundreds of billions of dollars every year in the world. Therefore, in order to solve the problem that steel is easy to corrode in atmosphere, ASTM A242 Type 2 weathering steel plates etc. weathproof steel have been developed.

Even ASTM A242 Type 2 weathering steel plates is under same ASTM A242/ A242M standard with A242 Type 1 weather resistant steel plates, their application fields are distinct. ASTM A242 Type 2 steel plates are mainly used in urban furnishing, passenger ships or cranes., etc. While A242 Type 1 steel are usually used in housing structures, construction industry and freight cars.

The corrosion resistance of ASTM A242 Type 2 weathering steel plates is 2~8 times than that of ordinary carbon steel such as A36, S235JR, SS400, A283C. And and the longer the use time is, the more prominent the corrosion resistance of ASTM A242 Type 2 weathering steel plates is. In addition to good weatherability, A242 Type 2 weatherproof steel has excellent mechanical and welding properties also.