Grade

Purity of Tungsten%

Type

Application

WALI

>=99.92

T

Double-screwy filament, Filament for high colour temperature lamp and shockproof lamp,ect.

L

Filament for incadscent lamp.Cathode for emitting tube.High temperature electrides.Tungsten wire in twisted,ect.

W

Folded-heater for electronic tube,ect.

WAL2

>=99.92

T

Filament for fluorescent lamp,ect.

L

Heater for electronic tube,Filament for incandescent lamp.Tungstem wire in twisted,ect.

W

Folded-hrater,Grid and Cathode for electronic tube.

W1

>=99.95

-

Tungsten wire in twisted and heating parts,ect.