Product Overview
12% Silicon Aluminum is an aluminum-silicon alloy with a nominal composition of 88% Al and 12% Si, close to the aluminum-silicon eutectic of 12.6% Si. At this composition the alloy melts at a single low temperature of about 1,071–1,080°F (577–582°C), the lowest melting point of any aluminum-silicon alloy, so it melts quickly and blends easily into an aluminum bath.
It is used to raise the silicon content of aluminum melts without the slow dissolution of silicon metal, and as a base for producing high-silicon casting alloys. The near-eutectic composition is also the basis of 4047 aluminum filler and brazing alloy and of 413-type casting alloys, which have excellent fluidity.
Supplied as 3-16 ingot. For larger silicon additions, our 50/50 Silicon Aluminum delivers more silicon per pound.
