Investigation of Mild Steel Mechanical Properties Welded by Gas Metal Arc Welding

In global environment, welding plays a major important role in manufacturing technology. Gas Metal Arc Welding process (GMAW) dominates other welding processes. The selection of shielding gas is a big challenge in industries. The usages of shielding gases have been increased towards better productivity, good weld quality and better mechanical properties. In this study, the shielding gases like pure CO2 and pure Argon + pure CO2 are used and experimented. The multipass welding is used in this method by four passes procedure. The mechanical properties like tensile strength, impact energy and hardness values were tested in parent metal since it was widely used for most of applications like marine, machine tools and structural applications. The welds produced by the shielding gases pure Argon + pure CO2 gives the better mechanical properties compared to welds produced by the pure CO2 shielding gas.