Welding technique is one of the widely used permanent fastener techniques, where in different types of welding are used for different applications. Welding creates property changes in the welded location. So it is important to investigate the mechanical properties after welding to create better joint design using welding techniques. In this work the effect of welding process using Metal Inert Gas Welding (MIG) and Manual Arc Welding (MAW) process on mild steel is studied. Welding process is carried out on 4 mm, 5 mm, 6mm thick plates of mild Steel using MIG and MAW welding processes. Properties such as tensile strength, toughness, hardness and micro structure of the each welding process of weld joints are evaluated and compared with the properties of MIG and MAW processes. The investigation reveals that MIGW joints are having higher mechanical properties than MAW joints while joining mild steel plates and V joint design is better than square butt joint.
