Aluminium 7075 Aircraft Grade

Aluminium 7075 is one of the highest strength aluminium alloys available. It has an excellent strength-to-weight ratio and is ideally suited for highly stressed structural applications in the aerospace and defence industries. 7075 was first developed in Japan in 1943 and was immediately used for airframe structures in World War II aircraft. Today it remains the most widely used aluminium alloy for aircraft applications including wing spars, fuselage structures, and other critical components. -- KEY FEATURES -- ~ One of the highest strength aluminium alloys ~ Excellent fatigue resistance ~ Good machinability ~ Average corrosion resistance (often clad for protection) ~ Stress-corrosion cracking resistant in T73 temper -- APPLICATIONS -- 7075 is typically used in: ~ Aircraft structural components ~ Wing spars and fuselage ~ Military equipment and ordnance ~ Rock climbing equipment ~ Bicycle components ~ High-stress recreational equipment ~ Mould tooling (in softer tempers) ~ Keys and key blanks -- TEMPER TYPES -- Common tempers include: T6 – Solution heat treated and artificially aged (highest strength) T651 – T6 plus stress relieved by stretching T73 – Overaged for improved stress-corrosion resistance O – Annealed (soft) -- WELDABILITY -- 7075 is generally considered not weldable by conventional methods due to its tendency to crack. Mechanical fastening is the preferred joining method. If welding is required, friction stir welding or specialized techniques may be used.