Foundry products
since 1879

CRYSTAL X-09 – Granular Flux for Aluminium Alloys

Crystal X-09 is a granular flux suitable for treating Aluminium alloys containing disturbing elements such as Calcium and Sodium. High Magnesium Aluminium alloys, such as 5000 and 7000 series, might have a high content of Calcium which reduce castability and homogeneous alloy structure. Eutectic and hypereutectic Aluminium-Silicon alloys may carry these elements. In Aluminium-Silicon eutectic alloys, Calcium, as an impurity, can affect the results of modification treatments with sodium fluxes or metallic sodium. It can also influence, in the negative way, gas absorption in the liquid metal. The elimination mechanism of Crystal X-09 is based on the reaction of Magnesium versus Calcium and Sodium, both soluble in molten aluminium. The products of this reaction are insoluble in the molten metal and have a lower specific gravity. The products released from reaction tend to float on the surface of liquid metal and can be drossed off.

Packaging and storage

25 kg paper bag laminated with polythene, moisture resistant, heat sealed at the base.


The product is hygroscopic. Store in a dry storage and close the package after each use. If the product is stored in a dry place away from sunlight, the product does not expire.

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