S355J0W Weathering steel: tough shield for buildings and Bridges

S355J0W weathering tempering chemical components

With iron (Fe) as the main component, containing an appropriate amount of carbon (C), usually controlled below 0.16%, to ensure good toughness and weldability of steel; The content of manganese (Mn) is about 1.5%, which can effectively refine the grain and improve the strength and fatigue resistance of steel. Chromium (Cr), nickel (Ni), copper (Cu) and other alloying elements are added in a certain proportion, chromium enhances the corrosion resistance of steel, nickel optimizes the toughness of steel in complex environments such as low temperature, copper promotes the formation of a dense and strong adhesion protective rust layer on the surface of steel in the atmospheric environment, slows down the corrosion process, so that the steel has excellent weather resistance.

S355J0W weathering steel performance characteristics

High strength: the yield strength reaches 355MPa and above, and the tensile strength is generally in the range of 470MPa-630MPa, which makes it able to withstand huge static and dynamic loads, providing stable support for large building structures, heavy machinery frames, etc., to ensure that the structure does not have obvious deformation or damage under long-term stress.

Good toughness: with enough impact toughness, especially in the low temperature environment is outstanding, such as in some cold areas of the project, even if the temperature drops to -20℃ or even lower, S355J0W steel can still maintain good toughness, effectively prevent brittle fracture, to ensure the safety and reliability of the project.

Excellent weather resistance: Specially designed for outdoor long-term exposure environment, under the action of natural factors such as atmosphere, rain, ultraviolet light, steel surface will gradually form a stable layer of oxide film and rust layer, this layer of "protective coat" not only will not accelerate corrosion, but can isolate external oxygen, water vapor and other corrosive media, inhibit corrosion to the inner layer expansion, greatly extend the service life of steel. Reduce later maintenance costs, and have full advantages in long-term open-air structures such as Bridges and building facades.

S355J0W weathering steel processing properties

Welding performance: Good welding performance, through reasonable selection of welding process parameters, such as welding current, voltage, welding speed, with suitable welding materials, can achieve high-quality welding, weld strength and base metal similar, and the weld area of the weather resistance can be effectively guaranteed, which is very important for the on-site assembly of large steel structures, splicing.

Cold processing performance: with a certain cold bending, cold rolling and other cold processing capabilities, according to the engineering design needs to process steel into various shapes of components, such as C-type, Z-type purlin, cold bending process of steel internal organization structure is basically stable, mechanical properties change in a controllable range, to meet the building roof, wall system diversified modeling needs.

S355J0W weathering steel application field

Architectural engineering: widely used in industrial plants, stadiums, exhibition halls and other large buildings of the roof, wall enclosure structure and load-bearing frame, not only the use of its high strength to carry the building load, but also with the weather resistance to reduce the appearance of maintenance frequency, to achieve the perfect unity of structural function and aesthetic effect, long-term maintain the building appearance clean and stable.

Bridge construction: It is a common material for modern Bridges, which is used for steel beams, bridge towers, railings and other components, which can withstand wind and rain, water erosion and vehicle driving vibration, while ensuring the safety of bridge structure, reducing the cost of anti-corrosion maintenance in long-term operation, extending the service life of Bridges, and improving the durability of traffic infrastructure.

Machinery manufacturing: Some open-air mechanical equipment, such as mining machinery, port cranes, wind turbine towers, etc., use S355J0W steel to make the frame and shell, which can adapt to the complex and changeable outdoor environment, reduce equipment failures caused by corrosion, improve the reliability and stability of equipment operation, and reduce the cost of the whole life cycle of equipment.