Alcan Aerospace has developed a family of thick plate products offering significant improvements in strength and fracture toughness compared to conventional 7050 products.  7140 T7651 is the latest solution in thick rolled plates offering very high strength combined with a good level fracture toughness and stress corrosion resistance.
 
These products allow for consolidation of built-up structures and weight savings opportunities for airframe producers.  Availability of rolled plates with low residual stress quality in very large cross sections also provides an alternative to forged products when control of machining distortion is critical.
 
Design data representing over 40 industrial plates is now available.  This information will be submitted for MMPDS and AMS specification coverage.  Additionally, The Boeing Commercial Airplane Group has performed an extensive testing program using the material.  Full scale machining of parts has also been conducted with very positive results and low machining distortion behavior.
 

Applications for 7140 T7651 may include wing spars and ribs, bulkheads, fuselage frames and various other fittings in aircraft structure.  This rolled plate product will be offered from 4 to 10 inches thick.