|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