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8079 Aluminum vs. ASTM B596 Au-Cu

8079 aluminum belongs to the aluminum alloys classification, while ASTM B596 Au-Cu belongs to the otherwise unclassified metals. There are 18 material properties with values for both materials. Properties with values for just one material (12, 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 8079 aluminum and the bottom bar is ASTM B596 Au-Cu.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
100
Elongation at Break, % 2.2
4.3 to 17
Poisson's Ratio 0.33
0.41
Shear Modulus, GPa 26
36
Tensile Strength: Ultimate (UTS), MPa 150
450 to 620

Thermal Properties

Latent Heat of Fusion, J/g 400
77
Melting Completion (Liquidus), °C 650
1060
Melting Onset (Solidus), °C 640
930
Specific Heat Capacity, J/kg-K 900
150
Thermal Expansion, µm/m-K 23
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 58
14
Electrical Conductivity: Equal Weight (Specific), % IACS 190
6.7

Otherwise Unclassified Properties

Density, g/cm3 2.8
18

Common Calculations

Stiffness to Weight: Axial, points 14
3.1
Stiffness to Weight: Bending, points 50
8.5
Strength to Weight: Axial, points 15
6.8 to 9.4
Strength to Weight: Bending, points 22
7.1 to 8.8
Thermal Shock Resistance, points 6.4
22 to 30

Alloy Composition

Aluminum (Al), % 98.1 to 99.3
0
Copper (Cu), % 0 to 0.050
9.0 to 11
Gold (Au), % 0
89 to 91
Iron (Fe), % 0.7 to 1.3
0
Silicon (Si), % 0.050 to 0.3
0
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0
0 to 0.4