Hot Sale Lighting Industry Tungsten Wire tungsten Filament

1.Specifications

Tungsten Filament 
purity:99.95% 
density:19.35g/cm3 
grade : WAL 1, WAL 2,WAL 3 ,W1 ,W2

 

2. Feature

 

Type	Purity of tungsten	Type	Application
WAl1	≥99.92	T	Double – screwy filament. Filament for high colour temperature lamp and shockproof lamp etc.
		L	Filament for incandescent lamp. Cathode for emitting   tube. High temperature electrodes. Twisted tungsten wire etc.
		W	Folded – heater for electronic tube, etc.
WAl2	≥99.92	T	Filament for fluorescent lamp etc.
		L	Heater for electronic tube. Filament for incandescent   lamp. Twisted tungsten wire etc.
		W	Folded – heater for electronic tube, etc.
WAl3	≥99.92	L	Filament for normal lamp. Spring wire for   semiconductors, etc.
W1	≥99.95		Tungsten wire in twisted and heating parts etc.
W2	≥99.92		Grid side rod for electron tube. Tungsten wire in   twisted etc.

 

  

3.Tungsten wires

 

 Tungsten is the most widely used refractory metal. It is essential for the production of lighting products such as wire filament, and other goods where its high temperature properties are of use in wire form. The properties the tungsten wire have are a melting point of 3410° C, a low coefficient of thermal expansion and low vapor pressure at elevated temperatures, along with good electrical and thermal conductivity.  

 

 

 

3.Application

 

The important applications of tungsten wires are for the production of coiled incandescent lamp filaments, cathode and support structures for power tubes, heating elements for high temperature furnaces and evaporation sources in metallizing processes. Thicker wire sizes, straightened, finish-ground and cut into rod pieces are widely used for glass-to-metal seal lead parts in the lighting and electronic industries