Knowledge about weathering steel plate

Knowledge about weathering steel plate

Weathering structural steel, i.e. atmospheric corrosion resistant steel, is a low-alloy high-strength structural steel, which can be divided into high weathering structural steel and weathering steel for welding structures according to its main characteristics

One high weathering steel

High weather resistant structural steel involves adding a small amount of copper, phosphorus, chromium, and nickel elements to the steel to form a protective layer on the collective surface of the metal to improve its atmospheric corrosion resistance. Additionally, a small amount of molybdenum, niobium, vanadium, titanium, zirconium, and other elements can be added to refine the grain size, improve the mechanical properties of the steel, improve the strength and toughness of the steel, reduce the brittle transition temperature, and make it have good resistance to brittle fracture. [1]

II. weathering steel for welding structure

The elements added to the steel grade, except for phosphorus, are basically the same as high weather resistant structural steel, and their effects are also the same, improving welding performance.

High weather resistant structural steel is mainly used for bolted, riveted and welded structural parts of vehicles, containers, buildings, towers and other structures due to its better atmospheric corrosion resistance than weathering steel for welded structures. When welding structural components, the thickness of the steel should not exceed 16mm. The welding performance of weathering steel for welding structure is better than that of high weathering structural steel, and it is mainly used for welding structural parts for bridges, buildings and other structures.