Welding is a method of bonding two pieces of metal together. In many cases, this bond can be stronger than the base material. The process of fusing two separate pieces of metal requires the base metal to melt and flow together. Old methods would use a blowtorch to heat metal until the base pieces reached melting temperature. New methods use electric arcs to generate the required heat. An electrode—consumable and charged positively or negatively depending on the character of the weld—is passed to a workpiece. There are many methods to achieve metal fusion via welding and choosing the right method is crucial. Here are the different welding methods and their applications: