http://www.ec21.com/ec-market/mild steel u channels.html http://canndontyre4u.en.ec21.com/Semi_Trailer_Semitrailer_Trailer--2567884_3055210.htmlMild Alloy (Q345B, tensile strength 34.5kg/mm^2) by Automatic submerged arc welding. U shape, Mild Alloy Q345B, tensil20090318 http://ritesh009.en.ec21.com/Nuts_Bolts--563321_905452.htmlsteel. All grade 5 and 8 U-Bolts are heat treated. Specifications: 1) 18 x 82 x 230 / 240 / 260 / 280 2) Mild steel, al20060127