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Sheet for x-ray tubes.
An example of the element Tungsten

Sample Image
Tungsten Sheet for x-ray tubes
Sheet for x-ray tubes.
I'll let the source describe this one:
"Pure" tungsten sheet, a popular seller on ebay, these are from a major SNAFU at a factory where they were making x-ray tube targets. In a nutshell x-ray tube tungsten must be processed by vacuum sintering and hot rolled into an essentially solid sheet for reasonable life, this material was hydrogen sintered and in as pressed condition, OOPS! Anyway to make a long story short they didn't know until they tried the burn-in and almost all the tubes failed. Many, MANY thousands of dollars of tungsten, work, and anode assemblies were wasted all because someone decided to buy the WRONG material because it was cheaper.

Source: eBay seller heruur
Contributor: eBay seller heruur
Acquired: 24 December, 2003
Price: Donated
Size: 7"
Purity: >98%
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