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Strength in numbers

Aluminium Alloy   |   ASTM & FED-QQ

QQ-A-200/3 T3511 Bar

Commercial2024
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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.
Used in high strength applications where no welding is required.

Chemical Composition

SAE AMS QQ-A-200/3
Alloy QQ-A-200/3
Chemical Element % Present
Aluminium (Al) balance
Other (Each) 0.05 max
Chromium (Cr) 0.1 max
Titanium (Ti) 0.15 max
Others (Total) 0.15 max
Zinc (Zn) 0.25 max
Silicon (Si) 0.5 max
Iron (Fe) 0.5 max
Manganese (Mn) 0.3 - 0.9
Magnesium (Mg) 1.2 - 1.8
Copper (Cu) 3.8 - 4.9

Alloy Designations

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:

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

Supplied Forms

Alloy QQ-A-200/3 is supplied in Bar, Rod, Wire, Tube and Extruded Sections.

  • Bar
  • Extrusions
  • Tube

Generic Physical Properties

Physical Property Value
Density 2.79 g/cm³
Melting Point 640 °C
Thermal Expansion 23.1 x10^-6 /K
Modulus of Elasticity 73 GPa
Thermal Conductivity 121-150 W/m.K
Electrical Resistivity 30-40 % IACS
'Typical' Physical Properties are given

Mechanical Properties

These Mechanical Properties are for QQ-A-200/3 Bar in the T3511 temper

Diameter (mm) Proof Strength (Min) Tensile Strength (Min) Elongation % (Min)
Up to & incl. 6.3 290 392 12
Over 6.3 up to & incl. 19 303 413 12
Over 19 up to & incl. 38.1 317 448 10
Over 38.1 358 482 10