SYLVANIA Large Diameter Tungsten Rod is manufactured by powder-metallurgical techniques.  Hydrogen-reduced tungsten powder, produced by SYLVANIA to rigidly controlled purity, particle size, and size distribution is consolidated by pressing and sintering into billets, which are worked by rolling and/or swaging into rod.  The rod is furnished in straight random lengths with an as swaged, as machined, or as centerless ground surface at diameters from 0.625” to 2.000”.  Maximum length and weight is 8 foot or 50kg.  Specific lengths and special fabrications, such as beveling, pointing, and step grinding will be supplied upon request. 

For additional technical information see our Large Diameter Tungsten Rod Technical Information Bulletin...

SYLVANIA also offers tungsten rod in diameters less than 0.625” in the following types of material: pure tungsten, potassium doped (VM grade) tungsten, 1.3% lanthanated tungsten, 1 and 2% thoriated tungsten, potassium doped 1 and 2% thoriated tungsten and lighting grade potassium doped tungsten. 

For information on tungsten rod sizes less than 0.625” diameter, see our Tungsten Rod Technical Information Bulletin...

PURE TUNGSTEN
Pure tungsten rod is 99.95% pure tungsten with a fine-grained worked structure.  The material is used for high-temperature furnace elements and as feed for subsequent operations such as machining, forging, or extrusion.

POTASSIUM DOPED TUNGSTEN (VM GRADE)
Potassium doped (VM grade) tungsten rod is 99.95% pure tungsten doped with 15 to 40 ppm of potassium with a fine-grained worked structure.  The material’s main applications are as high intenstity lamp electrodes and as feed for subsequent operations such as machining, forging, or extrusion.

TUNGSTEN LANTHANA (1.3% La2O3)
Tungsten 1.3% lanthana rod contains 1.1% to 1.6% lanthana (La2O3).  It is an alloy of 98.7% pure tungsten with 1.1% lanthanum (1.3% lanthana) with a fine-grained worked structure.  The material’s main applications are as rocket nozzles and as feed for subsequent operations such as machining, forging, or extrusion.