The density of pure aluminum (ρ = 2.7g / cm3), about 1/3 of iron, low melting point (660 ℃), aluminum is face-centered cubic structure, it has a high plasticity (δ: 32 ~ 40%, ψ: 70 ~ 90%), ease of processing, sub copper recovery can be made into a variety of profiles, sheet metal, good corrosion resistance. But the strength of aluminum is very low, annealed σb value of approximately 8kgf / mm2, it is not suitable for structural materials. Through long-term production practice and scientific experiments, people gradually adding alloying elements and heat treatment and other methods to strengthen the aluminum, which has been a series of aluminum alloy. Add some elements to form the alloy while maintaining the advantages of lightweight aluminum with high intensity while, σb values ??of up to 24 ~ 60kgf / mm2. This makes the "specific strength" (strength and weight ratio σb / ρ) is better than a lot of steel, an ideal structural material, widely used in machinery manufacturing, transportation machinery, power machinery and aviation industries, the aircraft fuselage , skin, compressor, often aluminum alloy, Jiangsu Zi copper recovery, to reduce weight. Aluminum instead of steel materials, welding, structural weight can reduce more than 50%. To solve the casting defects caused by hereditary charge, we must use high metallurgical quality of aluminum ingots, master alloys and other charge. Specific criteria are as follows: (1) on the fracture surface should not have pinholes, pores pinhole should be less than three, Hunan child copper recovery, local (not more than 25% of the subject area) should not exceed three, Hubei child copper recovery , more than three must take heavy melting ways to reduce pinhole. Remelting refining the same way as regular aluminum smelting, casting temperature should not exceed 660 ℃, for those of the original large grain of aluminum ingots, ingots, etc., should be used to lower the temperature of the ingot mold, making them rapid solidification, grain refinement tablets. Zhejiang child copper recovery | Sun Shine scrap metal recycling (Online) | Sub copper recovery recycling scrap metal from the Linyi City Shengxin Limited. Linyi City Shengxin scrap metal recycling Ltd. (shengxin.tz1288.com) Shandong Linyi, leading scrap metal, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Shengxin scrap metal recycling leadership with the staff warmly welcome all inquiries negotiations to create Shengxin scrap metal recycling better future.