  Strontium aluminum master alloy rod.
Master alloys are used to add small amounts of alloying agents to a pot of melted metal. They contain a much larger concentration of the agent pre-mixed with the base metal you want to amend. In this case it's somewhere between 10% and 30% strontium mixed into aluminum (the seller wasn't sure what grade of strontium aluminum the rods are).
Source: eBay seller consiliumdesigns
Contributor: Theodore Gray
Acquired: 28 February, 2009
Text Updated: 1 March, 2009
Price: $5
Size: 12"
Composition: SrAl
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