Welding of steel sheet structures, light structural steels,automobile bodies, machinery guards..Features: 1) Welding temperature is lower than 300 degrees 2) Material: C<=0.12 Mn<=0.3-0.6 Si<=0.35 P<=0.04 Cr - Ni - Mo - V - 3)carbon steel structure Inner packing: 1) 2.5mm x 300mm, 1-5kg/inner box + plastic bag 2) 3.2mm x 350mm, 1-5kg/inner box + plastic bag 3) 4.0mm x 350mm, 1-5kg/inner box + plastic bag