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S235J2W Weathering Steel Plate Technical Specifications

S235J2W is a structural steel resistant to atmospheric corrosion as defined in the European standard EN 10025-5, with the material designation 1.8961. It is characterized by the addition of alloying elements such as Cu, Cr, and Ni to the standard structural steel S235J2. After prolonged exposure to the atmosphere, a dense, stable patina forms on its surface, effectively isolating the steel from air and moisture erosion to enhance its corrosion resistance in atmospheric environments. It is widely used in outdoor steel structures, construction projects, bridge construction, municipal facilities, and railway engineering.