ALUMINUM 138 is an aluminum permanent mold casting alloy recommended for applications where a combination of high hardness is as-cast condition, good casting characteristics and good machinability are required. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive and shear strength. It also includes information on corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: Al-135. Producer or source: Aluminum Company of America.