Aluminium, ASTM & FED-QQQQ-A-200/11 T6511 Bar & Extrusion

Very high strength aerospace aluminium alloy.

A very high strength aerospace aluminium alloy with, depending upon temper, yield strength of 24-68 ksi (165 - 465 MPa) and tensile strength of 40-78 ksi (275 - 540 MPa).

This alloy is used where high strength is required and where good resistance to general corrosion is NOT important.

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Related Specifications

Aluminium alloy QQ-A-200/11 has similarities to the following standard designations and specifications but may not be a direct equivalent:

  • AMS 4166
  • AMS 4168
  • AMS 4169

Temper Types

Alloy QQ-A-200/11 is supplied in a wide range of tempers:

  • T62
  • T6510
  • T73
  • T7310
  • T7311
  • T8511
  • T7351
  • T73511
  • T6511
  • O
  • T6


Chemical Composition


  • Aerospace components
  • Defence components
  • High technology applications


  • High strength
  • Very good machinability
  • Weldable using resistancce, spot & beam methods
  • Poor resistance to atmospheric corrosion

Additional Information

Mechanical Properties

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