aluminum coil for roofing

Aluminum is now the second in the metal application in human production and life. When smelting aluminum, a variety of aluminum alloys have been formed by adding other metals such as manganese, magnesium, copper, zinc, iron and tin. The addition of various metals can greatly improve the mechanical, physical and chemical properties of aluminum alloy. According to the proportion of various metals in aluminum alloy, the aluminum alloy can be greatly improved, Nine series of aluminum alloys have been formed. Different industries adopt different series of aluminum alloy according to the requirements and characteristics of application. aluminum coil for roofing has been applied to buildings at the beginning of this century. For example, a gymnasium near Pittsburgh City, USA, was built in 1927 and aluminum plate was used as roofing material. After 61 years of construction, relevant departments inspected it in 1988, and found that the roof condition was still in good condition. Aluminum roof material has excellent durability.
aluminum coil for roofing has such excellent durability because aluminum plate and atmosphere contact will produce a layer of alumina film on the surface, which protects the inner aluminum plate from further corrosion. This layer of oxide film has good chemical resistance, so it is suitable for industrial buildings, where air pollution is serious or has marine climate. The relevant departments have tested the thickness of aluminum plate due to corrosion is 0.5 μ m every year. In this way, the 0.7mm thick aluminum plate can be 0.65mm thick after 100 years of atmospheric corrosion. Therefore, it can be considered that aluminum coil for roofing is one of the most durable roofing metal materials.
The aluminum used in the roof in the United States is 35million tons per year. Aluminum alloy is mainly used in the construction industry in extrusion profile and roll rolling plate. The extruded profile mainly uses 6000 series alloy, aa6062, aa6063 and so on are commonly used brands.
The aluminum magnesium manganese alloy plate roof / curtain wall system mainly uses 3000 series of aluminum manganese (aluminum manganese magnesium) alloy. The elongation, hardness, tensile strength and yield strength of 3000 series aluminum manganese alloy are very suitable for the processing of roof edging and rolling equipment, so it is widely used in the maintenance projects outside the building such as roof / wall system, In addition, the architectural appearance is enriched and colorful with various painting systems and coating technology, and the corrosion resistance of aluminum alloy itself is increased. The thickness of aluminum coil for roofing is 0.7mm. When the thickness of aluminum is 1mm, the weight is 2.7kg/m2 and the thickness is 0.7mm, the mass of aluminum is 1.89kg/m2. The length of the coil is unlimited. The main characteristics of the system are: density is 2.7, melting point is 658, linear expansion coefficient is 0.0000023 when the temperature is 20-100 ℃, fracture load coefficient is 8-12kg/mm2 (varies according to material hardness), elongation rate is 10-40%, thickness is 0.7-1.2mm, and when it is aluminum corrugated plate, the thickness can be reduced to 0.6mm. in addition to crimping and riveting, the fixed method is used, Welding can also be used.