Aluminum tube is a kind of high-strength duralumin, which can be strengthened by heat treatment. It has medium plasticity in annealing, hard quenching and hot state, and good spot welding. When gas welding and argon arc welding are used, the aluminum tube tends to form intergranular cracks; The machinability of aluminum tube is good after quenching and cold work hardening, but it is not good in the annealing state. The corrosion resistance is not high. Anodic oxidation and painting methods are often used or aluminum coating is added on the surface to improve the corrosion resistance.
 

SHANDONG BAOWU STEEL GROUP CO.,LTD.

is a comprehensive steel enterprise integrating warehousing pro- cessing. trading and distribution.It has its own processing plant which can process a series of surface processing, cutting process- ing forming,rolling,sandblasting and so on.The company's main products are stainless steel products (sheet, coil, pipe etc.), carbon steel products ( plate, coil, pipe etc.), galvanized steel products ( sheet, coil and pipe etc. )and other steel products, plates, and profiles! There is a stock of 20,000 tons of flat panels of variousspecifications. Own storage and processing 45,000 square meters. It has more than ten processing equipments such as cold-rolled slitting, decoiling proces and surface processing,with an annual processing capacity of 150000 tons.