Weather Resistant Steel Plate( Weathering Steel Plate) is a kind of low alloy series steel falling in between common steel and stainless steel. Weathering steel plate is made by adding little Cu, Ni and other anti- corrosion elements to common steel, which make this kind steel be with better toughness, forming property, weldability and cutting, anti- fatigue ability, etc. Weathering steel plate’s weather ability is common carbon steel plate’s twice to 8 times, coating performance is common carbon steel plate’s 1.5 to 10 times. Meanwhile, weather resistant steel plate owns anti- rusty ability, which can expand the service life for steels.