Foundry products
since 1879

NAPAL 950 – Flux for Sodium Addition

Napal 950 is a tabletted flux, to be immersed, after preheating at 200°C, into liquid Aluminium-Silicon alloys in order to add the necessary quantity of Sodium to perform the modification. Sodium induces a radical change of the solidification structure, with the disappearance of large crystals of primary Silicon and the modification of acicular (needle type) eutectic into rounded particles, properly dispersed in the “alfa” solid structure. The result is proved by the appearance of small, fine, dentrites cells. The consequence is the improvement of mechanical properties, especially the elongation values. The product is easy to use and safe for the operators.

Packaging and storage

200 gr tablets in 20 Kg boxes.


The product is hygroscopic: Store in a dry storage and away from heat sources. Close the package after each use. If stored properly the product has a shelf life exceeding 12 months.

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