Tungsten

Tungsten (also called wolfram) is a chemical element which has the symbol W (from ) and atomic number 74. It is a metal found naturally on Earth almost exclusively in compounds with other elements. It was identified as a distinct element in 1781 and first isolated as a metal in 1783. Its important ores include scheelite and wolframite, the latter lending the element its alternative name.

welding process that uses a non-consumable tungsten electrode