Square Tube Material: carbon steel square tube, low-alloy square tube. Carbon steel is divided into: Q195, Q215, Q235, SS400,20 # steel, 45 # steel; low-alloy steel into Q345,16Mn, Q390, ST52-3 like. Divided by square tube production standards: GB square tube, the standard square tube, inch square tube of large diameter pipe, American standard tube, square tube European standard, non-standard square tube. Galvanized its protective effect more square tube plant, strong corrosion resistance. The entire structure of zinc to form a dense crystalline quaternary seamless square tube factory, this crystal form a barrier on the steel, thus effectively preventing penetration of corrosive agent. Barrier layer of zinc corrosion protection from the strong. When zinc trimming, scratches and abrasions part as a sacrificial coating, they form insoluble zinc oxide layer, exert barrier protection. Square tube manufacturers, Hefei square tube, the exhibition is provided by the Hefei exhibition of Commerce Bo Bo Trading Company. Hefei Show Bo Trading Company (www.hfzhanbo.com) strong, credible, in Hefei steel industry has accumulated a large number of loyal customers. The company better work attitude and continuous improvement will lead the development of innovative ideas of Commerce Bo into the brilliant and you work for a better future!