Aluminium, ASTM & FED-QQQQ-A-200/3 T3511 (2024) Bar & Extrusion

High strength aerospace aluminium alloy.

A high strength alloy with, dependent upon temper, minimum proof stress up to 56 ksi/385 MPa and minimum tensile strength up to 70 ksi/482 MPa.

It is excellent on parts where good strength-to-weight ratio is needed and for use in high strength applications where no welding is required.

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Related Specifications

Aluminium alloy QQ-A-200/3 has similarities to the following standard designations and specifications but may not be a direct equivalent:

  • AMS 4164
  • AMS 4165

Temper Types

Alloy QQ-A-200/3 is supplied in a wide range of tempers:

  • T3
  • T3510
  • T81
  • T8510
  • T42
  • T3511
  • T8511
  • O


Chemical Composition


  • Aircraft structural components
  • Truck wheels
  • Medical instruments
  • Screw machine products


  • High strength
  • Very good machinability
  • Very good weldability
  • Improved stress corrosion cracking resistance
  • Excellent fatigue resistance

Additional Information

Mechanical Properties

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