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Strength in numbers

Aluminium Alloy   |   ASTM & FED-QQ

QQ-A-250/11 'T6' Sheet

Commercial6061

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)


Chemical Composition

SAE AMS QQ-A-250/11
Alloy QQ A 250/11
Chemical Element % Present
Aluminium (Al) balance
Other (Each) 0.05 max
Manganese (Mn) 0.15 max
Titanium (Ti) 0.15 max
Others (Total) 0.15 max
Zinc (Zn) 0.25 max
Chromium (Cr) 0.04 - 0.35
Copper (Cu) 0.15 - 0.4
Iron (Fe) 0.7 max
Silicon (Si) 0.4 - 0.8
Magnesium (Mg) 0.8 - 1.2

Alloy Designations

Aluminium alloy QQ-A-250/11 has similarities to the following standard designations and specifications but may not be a direct equivalent:

Alloy 6061, UNS A96061, ASTM B209, AMS 4026, AMS 4027


Temper Types

Alloy QQ-A-250/11 is supplied in a wide range of tempers:

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

Supplied Forms

Alloy QQ-A-250/11 is supplied in plate and sheet

  • Plate
  • Sheet

Generic Physical Properties

Physical Property Value
Density 2.63 g/cm³
Melting Point 650 °C
Thermal Expansion 23.3 x10^-6 /K
Modulus of Elasticity 70 GPa
Thermal Conductivity 166 W/m.K
Electrical Resistivity 0.04 x10^-6 Ω .m
Electrical Resistivity 43 % IACS
'Typical' Physical Properties are shown

Mechanical Properties

Mechanical Properties shown are for T6 temper

Thickness (mm) Proof Strength (Min) Tensile Strength (Min) Elongation % (Min)
Over 0.2 up to & incl. 0.5 241 290 8
Over 0.5 up to & incl. 6.3 241 290 10