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Molten welding rod.
An example of the element Tungsten

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Tungsten Molten welding rod
Molten welding rod.
This is a button of pure tungsten metal melted in an arc furnace I built out of a few fire bricks I got at an auction, a couple of graphite rods from a welding shop, and an old stick welder ("buzz box") I inherited from the former owner of my farm, the infamous Larry. It's surprisingly easy to build such a furnace and use it to melt the highest melting point element in the world, tungsten. You can read more about this process in my article in the May issue of Popular Science magazine.
Source: Theodore Gray
Contributor: Theodore Gray
Acquired: 20 February, 2004
Price: $1
Size: 0.75"
Purity: 99%
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