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The potential hazards of welding include harmful smoke (a mixture of fine particles – fumes - of metal and toxic gases), intense heat and sparks, loud noises, bright light, ultraviolet and infrared radiation. Exposure to welding fumes has been a common problem for welders, especially for those involved in railroad track and shipyard welding, automobile industry, construction, and heavy equipment manufacturing. Welding fumes are internationally classified as carcinogenic to humans ( IARC cla …

The history of joining different metals together dates back to the Bronze Age. But it wasn't until the end of the 19th century that the only welding process that existed was forge welding. Welding is a process that joins materials together by melting a metal piece with a filler metal to form a strong joint. Today, the most common types of welding processes are: Shielded Metal Arc Welding (SMAW), or Manual Metal Arc Welding (MMAW) Gas Tungsten Arc Welding (GTAW), or Tungsten Inert …