Aluminium, ASTM & FED-QQQQ-A-225/8 T651 (6061) Bar & Extrusion

Medium strength aerospace aluminium alloy.

A medium strength aerospace aluminium alloy with, depending upon temper, yield strength of up to 35 ksi (240 MPa) and tensile strength of 42 ksi (290 MPa).

This alloy is selected where a combination of strength, weldability and workability are required.

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Related Specifications

Aluminium alloy QQ-A-225/8 has similarities to the following standard designations and specifications but may not be a direct equivalent:

  • AMS 4113
  • AMS 4115
  • Alloy 6061
  • UNS A96061

Temper Types

Alloy QQ-A-225/8 is supplied in a wide range of tempers:

  • T42
  • T451
  • T62
  • T4
  • T651
  • O
  • T6


Chemical Composition


  • Aerospace components
  • Defence components
  • High technology applications


  • Very good machinability
  • Very good weldability using inert gas, resistance, spot or beam welding. Other welding methods are not recommended.
  • Good resistance to atmospheric corrosion

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