Recently, austenitic stainless steel is becoming very important and widely used in the industry due to their superior properties. Therefore, welding process of those has gained popularity in the construction of stainless steel. Gas metal arc welding (GMAW) and gas tungsten arc welding (GTAW) processes are easily used and more suitable compared with the other welding process for the austenitic stainless steel welding applications. In this study, the effect of shielding gases used in the welding process on the microstructure and mechanical properties of austenitic stainless steel weldments has been investigated using the knowledge available in the literature. It is stressed in the study that shielding-gas composition has great influence on the microstructure and mechanical properties of stainless steel weldment. The gases of Ar+H2, Ar+CO2, Ar+N2 used for welding process effects on microstructure therefore, mechanical properties of weldments.