DOW AZ81A is a heat treatable magnesium alloy containing aluminum and zinc as its primary alloying elements. It is exclusively a sand-casting alloy. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive, shear, and and bearing strength It also includes information on corrosion resistance as well as heat treating, machining, joining, and surface treatment. Filing Code: Mg-31. Producer or source: The Dow Chemical Company.