AZ63

AZ63 is a magnesium-based alloy in the AZ family, commonly used for die casting and, in some cases, wrought applications. It is described in industry references as a Mg-6Al-3Zn-type composition, with magnesium as the base metal and aluminum and zinc as the major alloying elements. Actual compositions can vary by producer and temper, but AZ63 generally contains around 6–7% aluminum and 3–4% zinc, with small additions of elements such as manganese or rare-earth refiners to improve grain structure and strength.

Processing and fabrication methods for AZ63 include high-volume die casting, which takes advantage of the alloy’s good castability and filling characteristics. Wrought forms may be produced by extrusion or other deformation processes. Heat treatment and aging can be used to modify mechanical properties in certain tempers, alongside work hardening and post-processing steps. Surface finishing, coating, and protective treatments are commonly applied to enhance corrosion resistance and wear performance.

Properties and performance of AZ63 are largely determined by its temper and processing. As with other magnesium alloys, AZ63 offers high specific strength and relatively good stiffness, while maintaining light weight. Its strength and ductility are highly dependent on heat treatment and alloying refinements, and it typically exhibits better castability than many aluminum alloys in the same weight class. Like other magnesium alloys, AZ63 is susceptible to galvanic corrosion and oxidation, so protective coatings and proper alloy selection are important for outdoor or aggressive environments.

Applications for AZ63 include automotive components, transmission and engine housings, precision die-cast parts, and other lightweight structural or functional components where strength-to-weight ratio is important.