Non-ferrous metal tubes are very close relationship with humans, are widely used in electrical, light industry, machinery manufacturing, construction industry, defense industry and other fields, after the aluminum consumption in China's non-ferrous materials. Power transmission needs to consume a lot of highly conductive aluminum tubes, mainly for power application. Cables, busbars, transformers, switches, plug connectors and couplings, etc. Aluminum HAZ embrittlement is often the root cause of broken tubes, induced catastrophic accidents. Partial embrittlement has two main areas, namely the heat-affected zone CGHAZ embrittlement due to grain grown too hot zone and cause adverse tissue formation, and when the multi-layer welding CGHAZ another critical embrittlement Shandong aluminum square tube manufacturers, namely CGHAZ again before the weld bead is heated by a subsequent two-phase region caused. This is done by adding a certain amount of aluminum in the Ti, Nb micro alloying elements and control weld cooling rate to get the right t8 / 5 to improve toughness. Because of the low carbon content aluminum, hardened tendency decreases, cold cracking tends to decrease. But as the intensity level increases Shandong aluminum square tube manufacturers, increasing the thickness of the aluminum square tube manufacturer Jinan, still has a certain tendency to cold cracking. When the scene is often used because of cellulose electrode welding, self-shielded flux-cored wire and other high hydrogen content of welding consumables, line energy is small, fast cooling aluminum square tube, cold cracking susceptibility increases, the need to take the necessary measures welding such as preheating before welding aluminum square tube manufacturer in Shandong, aluminum tube, aluminum rolls provided by the Aluminum Co., Ltd. Jinan rolls. Jinan Heshun Aluminum Co. (www.jnhsly.com) strong, credible, in Jinan, Shandong aluminum products industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead rolls in aluminum and you hand into the brilliant, for a better future!