... ,0.9mm,1.0mm,1.2mm,1.6mm2)Application: for welding of carbon steel and 500Mpa grade low-allow steel, such ... , shipping building , oil pipeline equipment, pressure vessels, steel constructions;2). welding of other 500Mpa level carbon steel and low alloy steel3 ... ). high-speed welding of light gauge plate and pipe line steel. MIG CO2 ...