ER70S-6 MIG Premium Welding Wire, Carbon Steel, 0.030 in dia, 33 lb SpoolMild steel welding wire that contains high levels of manganese and silicon which produces high quality welds when used on dirty, oily or rusty steel The high silicon content increases the fluidity of the weld pool, creating a smoother bead appearance resulting in minimal post weld grinding Engineered to provide porosity free, x ray quality welds at the highest tensile strength of all the plain carbon steel wires Requires a shielding gas of CO2 and or