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AMS QQ-A-225/3 / AlCu6BiPb / 2011 / T8

Chemical Properties % Value
Silicon (Si)0,40 Max
Copper (Cu)5,00 - 6,00
Lead (Pb)0,20 - 0,60
Iron (Fe)0,70 Max
Zinc (Zn)0,00 - 0,30
Nickel (Ni)0,00 - 0,20
Aluminium (Al)Balance
Physical Properties Value
Density2.82 g/cm³
Melting Point540 °C
Thermal Expansion22.9 x 10^-6 /K
Modulus of Elasticity70 GPa
Thermal Conductivity170 W/m.K
Electrical Resistivity%46 IACS
Mechanical Properties Value
Proof Strength310 MPa
Yield Strength420 MPa
Shear Strength240 MPa
Elongation A50 mm%12
Modulus of Elasticity70 GPa

Aluminium alloy 2011 is a high mechanical strength alloy that machines exceptionally well. Often called a Free Machining Alloy or ‘FMA’ it is well suited to use in automatic lathes.



Aluminium alloy 2011, AMS QQ-A-225/3 is covered by Standard BS EN 2100 and has similarities to the following standard designations and specifications:

2011, ISO AlCu6BiPb, 3.1655

UNS A92011,  BS FC1



The most common tempers for 2011 aluminium are:

  • O   - Soft
  • T3 - Solution heat treated, cold worked and naturally aged
  • T4 - Solution heat treated and naturaly aged to a substantially stable condition. 
  • T8 - Solution heat-treated, cold worked and then artificially aged.
  • T451 - Solution heat-treated, stress-relieved by controlled stretching and then artificially overaged (between T73 and T76). The products receive no further straightening after stretching.



2011 aluminium is supplied in round bar.

  • Round Bar
Mechanical Properties
Thickness (mm) Proof Strength (Min.) Yield Strength (Min.) Elongation A50 mm %
Over 3.17 up to & incl. 82.5 275 MPa 310 MPa %10