日韩精品一区二区三区成人vr_国产亚洲一区字幕_国产欧美成人一区二区三区_91成人动漫在线观看_欧美性电影在线播放_午夜精品亚洲_最新版的成人一区二区_亚洲一区二区在线免费观看视频伦理在线观看一区二区_婷婷在线影院在线观看_亚洲成色77777在线观看_在线观看亚洲福利小说_亚洲精品久久av_久久久久久久久久久久久久久综合_色久青草国产在线视频_av日韩精品一区在线观看

Characteristics of aluminum shell processing: 
1. Corrosion resistance. 
The density of aluminum shell is only 2.7g 7.83g/ cm3,8.93g/ cm3 cm3, which is about the density of steel, copper or brass. 
Aluminum exhibits excellent corrosion resistance in most environmental conditions, including air, water (or salt water), petrochemistry, and many chemical systems. 
2. Electrical conductivity. 
Aluminum shell processing is often selected because of its excellent electrical conductivity. 
On the basis of equal weight, the electrical conductivity of aluminum is nearly twice that of copper. 
3. Thermal conductivity. 
The thermal conductivity of aluminum alloy is about 50-60% of that of copper, which is beneficial to the manufacture of heat exchangers, evaporators, heating appliances, cooking utensils, as well as cylinder heads and radiators of cars. 
4. Non-ferromagnetism. 
Aluminum profiles are non-ferromagnetic, which is an important characteristic for the electrical and electronic industries. 
Aluminum profiles cannot be ignited spontaneously, which is important for applications involving loading, unloading or contact with flammable and explosive materials. 
5. Machinability. 
The machinability of aluminum shell is excellent. 
In all kinds of deformed aluminum alloy and cast aluminum alloy, as well as in various states after the production of these alloys, the machining properties change greatly, which requires special machine tools or technology. 
6. Formability. 
Specific tensile strength, yield strength, ductility and corresponding processing hardening rate dominate the change of allowable deformation.