Elkem two micrographs Elkem
Two micrographs show the concentration of graphites in the 3.5-mm fin of a casting, Superseed Extra Al Inoculant (left) and a ferrosilicon inoculant (right.)

New Specialty Inoculant for Gray Iron

High-aluminum foundry additive maximizes chill reduction, reduces casting porosity, and increases the tensile strength of gray-iron castings

ELKEM MATERIALS INC. offers a new high-aluminum inoculant that, according to the experience of foundries maximizes chill reduction, reduces casting porosity, and increases the tensile strength of gray-iron castings. The new Superseed® Extra Al Inoculant contains a special combination of aluminum, strontium, and zirconium that eliminates chilled white iron in thin sections and corners, increasing the machinability of gray-iron castings.

This new inoculant also achieves strong chill reduction without relying on calcium, as in other inoculation practices. As a result, this low-calcium inoculant generates very little slag, reducing the slag build-up in iron being transferred to pouring equipment and minimizing the possibility of casting defects.

Elkem’s specialty inoculants, nodularizers, cover conditioners, preconditioners, and ferrosilicon products help foundries achieve superior-quality castings that meet user requirements, including chill-free iron, improved graphite structure and mechanical properties, lack of porosity from shrinkage, and lower total costs.
Learn more at www.elkem.com

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