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Abstract
The study aims to examine how the notch toughness of stainless steel weld metals are influenced by the shielding gas. The compositions of shielding gas have significant effect on the notch toughness of the stainless steel weld metal using solid wires, but only slight effect while using flux-cored wires. Inclusions and/or delta-ferrite have pronounced effects on the notch toughness of all the deposited metals. Both vermicular and lathy ferrite are observed, and the ferrite content is decreased by increasing the amount of CO2 in the Ar + CO2 mixtures in both group samples.