Incomag Alloy 3LC is a nickel base alloy containing 4.0 to 5.0 percent magnesium and about 0.025 percent carbon. This improved foundry additive alloy was developed by Inco for the production of ductile iron. A highly efficient magnesium transfer is achieved, resulting in magnesium recoveries of 80 to 90 percent and generation of minimal MgO fumes to acceptable emission levels.

The product has an approximate density of 7.7 g/cc compared to 6.9 g/cc for liquid cast iron. Incomag Alloy 3LC can thus be dropped into the melt in ladles or furnaces. The relatively quiet reaction which follows depends on proper balance of the alloy composition.

The capability of adding Incomag Alloy 3LC directly into the melt makes it possible to treat at the most advantageous point in the process cycle. Small trim additions can also be made to furnaces or ladles to bring subcritical magnesium residuals into range and restore full spheroidization.

The usual relationship of improved magnesium treatment efficiency with decreasing temperature applies to this alloy. Good performance in extensive laboratory and field testing has been obtained throughout the 2550°F to 2750°F (1400°C to 510°C) range for all grades of ductile iron.

Incomag Alloy 3LC is also used as a deoxidizer and desulfurizer, and to control the morphology of sulfide inclusions in ferrous and nickel-base wrought alloys.

Effective Date: 2/1/04