Aluminum Silicon Modifiers

StroBor 10/2
Combination Grain Refiner and Modifier

KB Alloys, LLC. announces the introduction of a new aluminum based master alloy that serves both as a grain refiner and modifier for hypoeutectic aluminum silicon foundry alloys. The advantages of this combination product for foundrymen include:

Cost savings when compared to the use of discrete individual grain refiner and modifier product
Simplified foundry operations, only one product
to add to the melt as opposed to two
Reduced raw material inventory levels
Operator preferred
Better chemistry controls
Excellent modification and grain refining performance
Available in Ingot, Rod or Bar Form

Operative Mechanism

The benefits of grain refinement and modification of aluminum-silicon foundry alloys are well known. Conventional master alloy grain refiners containing titanium and boron, as well as modifiers, such as strontium, are used routinely throughout today's aluminum foundry industry.

While it has been known for some time that boron is an effective grain refiner, especially in silicon-bearing alloys, the practice has not been widely used nor commercially promoted. KBAlloy's, Inc. provides this opportunity by combining aluminum-based master alloy that provides both grain refinement and modification from a single product. The alloy is 10% Strontium and 2% Boron, balance Aluminum, giving a strontium-to-boron ratio of 5:1.

Other strontium-to-boron ratios are available upon request.

Unlike traditional grain refiners, StroBor master alloy contains no titanium. Rather it takes advantage of the fact that both primary and secondary aluminum-silicon foundry alloy ingot contain titanium, either as a purposeful addition by primary ingot producers or as residual titanium in the scrap stream used by producers of secondary alloy ingot.