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2011 Aluminum vs. 2011A Aluminum

Both 2011 aluminum and 2011A aluminum are aluminum alloys. Their average alloy composition is basically identical.

For each property being compared, the top bar is 2011 aluminum and the bottom bar is 2011A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
70
Elongation at Break, % 8.5 to 18
6.8 to 16
Fatigue Strength, MPa 74 to 120
75 to 100
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 27
26
Shear Strength, MPa 190 to 250
190 to 250
Tensile Strength: Ultimate (UTS), MPa 310 to 420
310 to 410
Tensile Strength: Yield (Proof), MPa 140 to 310
140 to 310

Thermal Properties

Latent Heat of Fusion, J/g 390
390
Maximum Temperature: Mechanical, °C 190
190
Melting Completion (Liquidus), °C 640
660
Melting Onset (Solidus), °C 540
550
Specific Heat Capacity, J/kg-K 870
870
Thermal Conductivity, W/m-K 140 to 170
130
Thermal Expansion, µm/m-K 23
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 35 to 45
33
Electrical Conductivity: Equal Weight (Specific), % IACS 100 to 130
96

Otherwise Unclassified Properties

Base Metal Price, % relative 11
11
Density, g/cm3 3.1
3.1
Embodied Carbon, kg CO2/kg material 7.9
7.9
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1150
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 29 to 52
20 to 40
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 680
140 to 670
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 44
44
Strength to Weight: Axial, points 27 to 37
28 to 37
Strength to Weight: Bending, points 32 to 40
33 to 40
Thermal Diffusivity, mm2/s 51 to 64
49
Thermal Shock Resistance, points 14 to 19
14 to 18

Alloy Composition

Aluminum (Al), % 91.3 to 94.6
91.5 to 95.1
Bismuth (Bi), % 0.2 to 0.6
0.2 to 0.6
Copper (Cu), % 5.0 to 6.0
4.5 to 6.0
Iron (Fe), % 0 to 0.7
0 to 0.5
Lead (Pb), % 0.2 to 0.6
0.2 to 0.6
Silicon (Si), % 0 to 0.4
0 to 0.4
Zinc (Zn), % 0 to 0.3
0 to 0.3
Residuals, % 0
0 to 0.15

Comparable Variants