Higher Strength 7xxx Options

According to Aluminum Standards and Data, the minimum tensile yield strength for 7075-T62 and T651 plate varies from 54.0 ksi to 67.0 ksi, depending on thickness, with the lower value applying to the thickest (4.000”) plate for which properties are registered. The minimum ultimate tensile strength for 7075-T6, T62, T6510 and T6511 extrusions varies from 68.0 ksi to 72.0 ksi, again depending on thickness.
There are a number of 7xxx plate and extrusion products having higher strengths that have been registered with the Aluminum Association by Alcan (and former Pechiney), Alcoa, Aleris, and Universal Alloy Corporation. For plate products, a tensile yield strength minimum as high as 86 ksi and an ultimate tensile strength as high as 89 ksi have been registered. For extrusions, a tensile yield strength minimum as high as 95 ksi and an ultimate tensile strength as high as 99 ksi have been registered.
Tables 1 and 2, below, summarize the longitudinal tensile properties registered for various high strength 7xxx plate and extruded products, respectively. Actual registrations provide a single value for minimum ultimate tensile strength, tensile yield strength and elongation for a specific thickness range. In the summary tables below, for simplicity, ranges are given for the entire registered range of production.

To obtain minimum values for a particular thickness, for transverse minimum properties and for specific notes concerning the resistance to stress corrosion cracking, exfoliation corrosion or fracture toughness, please refer to the publication, Yellow Sheets - Tempers for Aluminum and Aluminum Alloy Products or to specification sheets from the individual producers:

• Alcoa's 7055 Alloy - T7751 Plate and T77511 Extrusions
• Kaiser's Tube and Pipe Alloy 7068
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