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Investment cast super-alloys may require surfaces with specially
controlled grain sizing. The most common means of obtaining these
critical grain domains on the surface is by incorporating nucleating
compounds in the prime dip coat. The following lists the most commonly
used nucleating compounds.

Cobalt Aluminate 6330 Co 39-41.5%
Cobalt Aluminate K-4704 Co 30.5-33%
Cobalt Aluminate 6370 Co 38.5-41%
Cobalt Meta-Silicate K-4538 Co 40.5-44%

The materials above have helped in the manufacture of engineering
components for major aerospace, automotive and medical equipment
suppliers throughout the world. Other foundries, including grey-iron
(sand molds) occasionally paint the molds at points of stress
with a slurry of a nucleating compound such as cobalt-aluminate.
It is reported this tends to reduce cracking. Proprietary
compounds will be prepared upon request for both
experimental testing and in commercial quantities.

For assistance with any questions or orders related to
Mason Nucleating Compounds, please contact: Eric Davis.

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