Welders cut, gouge, polish, and, most critically, unite metal components. Steel, cast iron, bronze, aluminium, or whatever metal is required for the job. Welders work by essentially melting the edges of metal pieces, causing the materials to flow together, and then cooling to produce a permanent connection. A metal welding rod is frequently melted as part of the operation to provide the additional material required to finish the weld. 

Torches capable of producing flames as high as 6,000 degrees Fahrenheit are used by some welders. Others use electricity to spark an arc between their tools and the work item. As a result, protective equipment, such as gloves and a helmet with a view plate, is required. 

Welding can be a physically demanding job. A welder must be able to work in difficult conditions and be strong enough to lift big objects. Despite the fact that plastics and other "wonder" materials get all the attention, the planet is still comprised of metal. Cars, ships, aeroplanes, bridges, and skyscrapers all require personnel who can weld metal properly and efficiently.