Aluminium Master Alloys

The use of Aluminium Master Alloys for the purpose of modification and grain refinement are becoming common in the aluminium foundry industry.  Ease of addition, cleaner environment, greater control over treatment processes, improved consistency in the casting quality are some of the advantages of using master alloys.

ACME ALLOY 101

This is used as a grain refiner in case of most of the aluminium alloys.  A fine equiaxed grain structure is obtained in the casting which otherwise solidifies with coarse columnar structure. This fine structure helps in better feeding characteristics, avoids cracking during metal working and improves response to the surface treatment processes.

Product Purpose Alloy Application Rate Packing
ACME ALLOY 101 (Aluminium 5% T: 1% B) Grain refinement of aluminum grain All alloys except high conductivity aluminium 0.2 – 0.4% Piglets of 200 gm.

ACME ALLOY 102 & ACME ALLOY 103

This is used as a modifier in case of aluminium silicon eutectic alloys. Modification of the morphology of the eutectic silicon phase in aluminium silicon alloy casting from coarse platelets to a fine fibers structure results in improved soundness and mechanical properties, particularly ductility.  Strontium is superior to sodium in its ability to retain its modification effect for extended periods of melt holding.  The modification provided by strontium is commonly referred to as a “permanent” modifier.

Product Purpose Alloy Application Rate Packing
ACME ALLOY 102 (Aluminium 5% Sr.) Modification of aluminium silicon eutectic Aluminium Silicon hypo and eutectic alloys 0.5 – 0.6 % Piglets of 200 gm.
ACME ALLOY 103 (Aluminium 10% Sr.) Modification of aluminium silicon eutectic Aluminium Silicon hypo and eutectic alloys 0.25 – 0.3 % Piglets of 200 gm.