Buy Pure Tungsten Rods Online

We stock tungsten rods 12" and 36" in length with different diameters. The surface of the tungsten rods can be either regular or polished.

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We try our best to keep every product in stock. However, some items may require a lead time of 1 month due to unexpected variation in demand.

First Uses of Tungsten

Tungsten’s first use was in incandescent lamp filaments. Even though incandescent lamps are being dislodged by more energy-efficient LED lamps, tungsten is still of great importance to the lighting industry because it offers exceptionally high strength at very high temperatures. In fact, it has the best high-temperature strength of the four common refractory metals: Molybdenum, Tantalum, Tungsten, and Niobium.

If you want to learn more, please visit our website Customized Metal Tungsten Products.

Some specialty incandescent lamps such as halogen lamps still use tungsten filaments, and high-intensity arc lamps employ tungsten electrodes.

Lamp filaments are not pure tungsten, but a “doped” alloy containing micron-sized potassium bubbles that stabilize the filament’s grain structure and produce a highly creep-resistant material. Arc lamp electrodes were previously made from tungsten doped with thoria (thorium oxide), but the thoria undergoes a nuclear decay process that produces radon. Concerns for radon exposure resulting from inhaling thoria particles have virtually eliminated the alloy’s use throughout the world.

Instead, alternative materials are now in use for such applications. Potassium-doped tungsten and tungsten doped with lanthanum oxide or a combination of lanthanum and zirconium oxides have replaced thoria-doped material.

While these alloys are not as effective at promoting easy arc formation and stable arcs in the lamps, they are far less of an environmental and health concern.

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