Kaiser Alloy 7X49 is used in aircraft structural parts. The alloy has characteristics of high strength and good machinability. Good resistance to stress-corrosion cracking in –T7 type temper. X represents either or 1 or 0 as noted in the tex This datasheet provides information on composition, physical properties, elasticity, tensile properties, and shear strength as well as fatigue. It also includes information on corrosion resistance as well as forming and joining. Filing Code: Al-443. Producer or source: Kaiser Aluminum Corporation.