Alloy AL7
Designation
Description
Alloy AL7 used: for the manufacture of shaped castings sredneshirotnykh parts, small in size; of casting parts, metallurgical engineering (parts of small size, bearing high static and shock loads).
Note
Aluminum foundry alloy system Al-Cu. Alloy AL7 in the hardened mortar type, and also at the expense of dispersed precipitates phase CuAl2. AL7 alloy has a high shrinkage (1.4 percent), prone to hot cracks and is therefore not recommended for casting in a metal mold.
Advantages: Satisfactory casting properties and good machinability.
Disadvantages: Low casting properties inhibit its use for complex and large workpieces. You should not use the alloy at temperatures above 200 °C.
Standards
Chemical composition
Al is the base.
According to OST 24.916.01-71, the iron content is indicated for sand casting, for melted models, die casting and die casting. The amount of impurities to be accounted for should be for sand casting, for melted models, die casting, die casting ≤ 2.20%.
According to OST 24.916.01-71, the iron content is indicated for sand casting, for melted models, die casting and die casting. The amount of impurities to be accounted for should be for sand casting, for melted models, die casting, die casting ≤ 2.20%.