Welding wire is a wire designed for welding and has the necessary physical and chemical properties for this. Welding wire is used for welding various metals and alloys using automatic or semi-automatic welding machines. Some types of welding wire require welding in an atmosphere of inert gases, and some have additives in their composition that allow welding in a normal atmosphere. To improve the quality of welds and stabilize the welding process, some types of welding wire are produced with copper coating. The industry produces various types of welding wire, which differ in physical and chemical properties, as well as the conditions for their use in welding work.