Tungsten is comparatively harder than any other metal and slightly radioactive. The melting point of Tungsten is very high approximately 3400° C.
It has excellent characteristics of electrical conductivity to pass the current within high temperatures and keep protection from burning up. There is a unique characteristic of tungsten alloy to produce a hotter arc than the actual melting point of the tungsten.
The tensile strength is up to 500,000 lbs./square inch which is extremely from any other metal component. Though Tungsten is much strong it is also brittle. For these reasons, TIG welding is used for a non-consumable electrode for creating an arch in TIG welding.