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2011 Aluminum vs. ASTM B780 Alloy

2011 aluminum belongs to the aluminum alloys classification, while ASTM B780 alloy belongs to the otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is 2011 aluminum and the bottom bar is ASTM B780 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
83
Elongation at Break, % 8.5 to 18
1.1 to 9.1
Poisson's Ratio 0.33
0.36
Shear Modulus, GPa 27
30
Shear Strength, MPa 190 to 250
200 to 340
Tensile Strength: Ultimate (UTS), MPa 310 to 420
330 to 590

Thermal Properties

Latent Heat of Fusion, J/g 390
140
Specific Heat Capacity, J/kg-K 870
270
Thermal Expansion, µm/m-K 23
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 35 to 45
70 to 76
Electrical Conductivity: Equal Weight (Specific), % IACS 100 to 130
62 to 68

Otherwise Unclassified Properties

Density, g/cm3 3.1
10

Common Calculations

Stiffness to Weight: Axial, points 13
4.5
Stiffness to Weight: Bending, points 44
14
Strength to Weight: Axial, points 27 to 37
9.1 to 16
Strength to Weight: Bending, points 32 to 40
11 to 15
Thermal Shock Resistance, points 14 to 19
16 to 29

Alloy Composition

Aluminum (Al), % 91.3 to 94.6
0
Bismuth (Bi), % 0.2 to 0.6
0
Cadmium (Cd), % 0
0 to 0.050
Copper (Cu), % 5.0 to 6.0
23.5 to 25.7
Iron (Fe), % 0 to 0.7
0 to 0.050
Lead (Pb), % 0.2 to 0.6
0 to 0.030
Nickel (Ni), % 0
0.35 to 0.65
Silicon (Si), % 0 to 0.4
0
Silver (Ag), % 0
74 to 76
Zinc (Zn), % 0 to 0.3
0 to 0.060
Residuals, % 0 to 0.15
0