SYLVANIA is a leading manufacturer of Tungsten–3% Rhenium Wire (Type 3RW).  Type 3RW contains 3.1–3.4% rhenium by weight; the balance being tungsten, which is 99.95% pure. 

For more information see our Technical Information Bulletin...

Type 3RW is used for certain applications in lamps, electronic tubes, and other devices requiring the characteristic of recrystallizing to a ductile state.  In applications requiring elongation or resistance to shock and vibration, tungsten–3% rhenium wire is often superior to tungsten wire.  Tungsten–3% rhenium heaters in radio tubes and cathode ray tubes remain ductile after thousands of hours of operation.