Steel is an alloy mainly of iron and carbon. Highly malleable, ductile, sonorous. Due to high tensile strength and low price, it is mainly used in tools, building materials, various parts of home appliances etc. steel is one of the most recycled material in world (about 60%). The basic material of steel alloy is Iron. MIG welding is an exact and quickest welding system for the welding of steel. It is exceedingly controllable, fumeless and splash less spotless process. The present work manages THE welding of SS304 grade of steel. The case study is of welding machine used in longway industriesfor welding of 2 steel vessels for the formation of electric geyser tank. There are various parameters which influence the welding quality.