Is not aluminum alloy better than steel?
Plastic shortcomings: Each product has its shortcomings, with the extensive use of steel profiles, some shortcomings also will be exposed. China's steel profiles most of the poor quality of the use of lead salt stabilizer, finished lead content between 0.6% -1.2%. Lead is a harmful substance to the human body, when the poor quality of aging, will precipitate lead dust, long-term exposure will lead to excessive lead in the blood, and even lead poisoning. The recent introduction of calcium and zinc and organic tin solution to solve the product contains Lead problems, but because of price reasons and technology immature, there is no large-scale application.
Aluminum alloy steel has its own advantages and disadvantages, in general, aluminum alloy is better than steel, high grade.
Steel is hard plastic squeeze into the cavity, then will be coupled with the steel lining, which see the strength of the manufacturers of doors and windows, and if the thickness of the steel lining is not enough, a long time will be deformed, but the price is low, because it is plastic So it is not a special heat.
Aluminum alloy must be a new type of aluminum, not the kind of the oldest kind of aluminum, the new aluminum cavity and plastic steel is the same, but the material is aluminum, good age, metal is hot fast, but It is also possible to add a kind of insulation material, cold bridge (also called broken bridge), plus this material can solve the problem of insulation, but also can do both positive and negative colors , Aluminum alloy is the high price of the general high-end district are equipped with aluminum alloy.
Aluminum alloy usually use copper, zinc, manganese, silicon, magnesium and other alloy elements, the early 20th century by the German Alfred Wilm invention, the development of the aircraft to help greatly, after a World War II German aluminum alloy composition is classified as state secrets. Compared with ordinary carbon steel has a lighter and corrosion-resistant performance, but the corrosion resistance is not as pure aluminum. In the clean, dry environment, the surface of aluminum alloy will form a protective oxide layer.
