... WIRE ER70S-6For welding low carbon and high strength steel structures of 500Mpa.80%Ar+20%CO2CO2 gas-shielded welding wires ... are primarily used for all position welding of steel structures, pressure vessels, containers, construction machinery, ships, railways, automobiles, ... 29) MIG/MAG Wire ER70S-3 For welding carbon steel and low-alloy steel structures.Shield gas:80%Ar+20%CO2