09CuPCrNi is Cor-Ten weathering steel (i.e. atmospheric corrosion resistant steel) in a
Element content: C:0.06 Si:0.57 Mn:0.74 P:0.018 S:0.013 Ni:0.71 Cr:0.53 Mo:0.01 V:0.01 Cu:0.46 (unit:%)
For sulfur containing flue gas, air preheater, economizer and boiler air preheater, it is commonly used for low temperature weathering steel to prevent acid dew point and so on. It has strong ability to resist low-temperature corrosion.
Cor-Ten (Corten), this kind of steel has protective effect of anti corrosion, as used in the appearance of the building, can make the facade of the building without the protection of paint. Once the "rust film" is generated, 80 years of corrosion resistance, no need to protect the paint.
Note: weathering steel is one kind, but it originated from Cor-Ten
Cor-Ten weathering steel originated in North America (Corten Steel), is widely used in the production of train carriage, container and bridge; weathering steel is used as building facade materials are in North America, Western Europe, Australia and Asia, Japan and South Korea have history. The earliest example was the Chicago Civic Center building, which was built in 1965, exposed to weatherproof steel structures and a mixed curtain wall of weathering steel plates and glass.
Weatherproof steel can be used as the main technical support of the facade material. The weatherproof steel has a strong corrosion resistance compared with the ordinary steel. In natural climate, the corrosion and thinning of steel can be reduced by 0.1 to 1mm for 5 years, and the thinning is more serious in a long time or in a special and artificial environment. The weathering steel (taking Wuhan Iron and steel products as an example) by adding copper, chromium, nickel and other weatherability elements, make the iron and steel materials between the rust layer and the matrix form a thick oxide layer with 50~100 m thick and good adhesion with the base metal. This special dense oxide layer has a stable and uniform natural rusty red.
Weathering steel has become an attractive building material with relatively low cost at the same time. The weathering steel curtain wall of China France center is further designed by the Zhongnan curtain wall company and the architect. It adopts 4 millimeter thick plate, which is lined with galvanized steel stiffeners, and then hangs on the outer wall keel. The slot between the boards is lined with drainage tanks. The heat resistance of the 30 thick extruded plate between the keel and the maintenance wall makes the thermal resistance of the outer wall meet the regulations of the "standard of energy saving for public buildings".
Weathering steel (i.e. atmospheric corrosion resistant steel) is between ordinary steel and stainless steel and low alloy steel series, sustainable development and innovation in the integration of modern metallurgy and new mechanism, new technology and new technology, is one of the world series of steel super steel technology level. By adding a small amount of carbon steel and copper, chromium, nickel and other corrosion resistant elements, toughness, plastic forming, welding, extension, abrasion, high temperature, fatigue properties of high quality steel; weathering resistance is 3~8 times of ordinary carbon steel, coating is 1.5~10 times of ordinary carbon steel, can reduce the use of thin, naked the use of simplified painting or use lotion. The steel has the characteristics of corrosion resistance, corrosion prolonging, thinning and reducing consumption, saving energy and saving energy, and benefiting the member manufacturers and users. For example, weathering steel bridge beams can save more than 10% of the construction investment. Weathering steel is of great economic and strategic significance, which is in line with the "green" concept of high efficiency, longevity, energy saving and environmental protection and the guidance of national development policy.
Steel structure has many advantages, such as high strength, high toughness, aseismatic and light weight, so as to reduce the cost and cost of foundation, and to meet the large opening and flexible segmentation of buildings, so as to increase the utilization rate.