... for gas shielding arc welding : 1,Diameter: 1.2mm, 1.4mm, 1.6mm 2, Approved by CCS, ER49-1 welding wire for gas shielding arc ... improved impact properties, avoid use of excessive amperage levels.• Backstep method should be applied to prevent blowholes and pits during arc ... %P0.151.600.750.0350.035Typicle Values(%) <0.081.00-1.200.30-0.45<0.020<0.025