SHIELDING GAS FOR MAG WELDING, MAG WELDING METHOD, AND WELDED STRUCTURE

摘要

The shielding gas for MAG welding according to an embodiment is a shielding gas for MAG welding to perform narrow gap welding of a high Cr steel containing 8 wt % to 13 wt % of Cr with one layer-one pass by using a solid wire containing 8 wt % to 13 wt % of Cr, and the shielding gas for MAG welding comprises a ternary mixed gas of 5% by volume to 17% by volume of a carbon dioxide gas, 30% by volume to 80% by volume of a helium gas, and a balance of an argon gas.