Welding is a fabrication process that joins materials, usually metals or thermoplastics, primarily by using high temperatures to melt the parts together and allow them to cool, causing fusion. Common
Overhead stick welding
Arc welding metal plates
The iron pillar of Delhi, India
Acetylene welding on a cylinder water jacket, US Army 1918
Electric resistance welding is a welding process in which metal parts in contact are permanently joined by heating them with an electric current, melting the metal at the joint. Electric resistance we