The exact origin and time of when man began working with metal is unknown, but there is no question that this monumental discovery has constantly held an extremely important place in human society. Rudimentary metalworking emerged during the earliest civilizations with the discovery of seven primary metals: gold, silver, mercury, copper, lead, tin and iron. These metals were used for decorative pieces such as jewelry and religious relics, as well as for more functional uses such as tools, currency and weapons. Using heat and tools, early metalworkers began crafting many of the objects that we could not imagine living without today. Over time, metal work became increasingly advanced and gained value in society. Today metals and metal alloys (the combination of two or more metals) are fabricated for use in virtually every commercial industry. Metal fabrication has played pivotal roles in the advancements of technology, transportation, agriculture and construction. In general terms, metal...