Show Tungsten Lamp Filament Wire The use of tungsten as a lamp filament wire is based upon certain properties which make it a metal of extremes Outstanding among these properties arc are a melting point of degrees Centigrade a n low vapor pressure and a tensile strength in the worked condition of pounds per square inch At Atone one time one time tungsten was regarded as asa asa a n brittle metal but an expert succeeded succeeded succeeded suc suc- in drawing a wire in such a away away away way as to make it bex at room temperature |