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7049 Aluminum vs. C72900 Copper-nickel

7049 aluminum belongs to the aluminum alloys classification, while C72900 copper-nickel belongs to the copper alloys. There are 29 material properties with values for both materials. Properties with values for just one material (2, 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 7049 aluminum and the bottom bar is C72900 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
120
Elongation at Break, % 6.2 to 7.0
6.0 to 20
Poisson's Ratio 0.32
0.34
Shear Modulus, GPa 27
45
Shear Strength, MPa 300 to 310
540 to 630
Tensile Strength: Ultimate (UTS), MPa 510 to 530
870 to 1080
Tensile Strength: Yield (Proof), MPa 420 to 450
700 to 920

Thermal Properties

Latent Heat of Fusion, J/g 370
210
Maximum Temperature: Mechanical, °C 180
210
Melting Completion (Liquidus), °C 640
1120
Melting Onset (Solidus), °C 480
950
Specific Heat Capacity, J/kg-K 860
380
Thermal Conductivity, W/m-K 130
29
Thermal Expansion, µm/m-K 23
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 36
7.8
Electrical Conductivity: Equal Weight (Specific), % IACS 110
8.0

Otherwise Unclassified Properties

Base Metal Price, % relative 10
39
Density, g/cm3 3.1
8.8
Embodied Carbon, kg CO2/kg material 8.1
4.6
Embodied Energy, MJ/kg 140
72
Embodied Water, L/kg 1110
360

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31 to 34
49 to 210
Resilience: Unit (Modulus of Resilience), kJ/m3 1270 to 1440
2030 to 3490
Stiffness to Weight: Axial, points 13
7.6
Stiffness to Weight: Bending, points 45
19
Strength to Weight: Axial, points 46 to 47
27 to 34
Strength to Weight: Bending, points 46 to 47
23 to 27
Thermal Diffusivity, mm2/s 51
8.6
Thermal Shock Resistance, points 22 to 23
31 to 38

Alloy Composition

Aluminum (Al), % 85.7 to 89.5
0
Chromium (Cr), % 0.1 to 0.22
0
Copper (Cu), % 1.2 to 1.9
74.1 to 78
Iron (Fe), % 0 to 0.35
0 to 0.5
Lead (Pb), % 0
0 to 0.020
Magnesium (Mg), % 2.0 to 2.9
0 to 0.15
Manganese (Mn), % 0 to 0.2
0 to 0.3
Nickel (Ni), % 0
14.5 to 15.5
Niobium (Nb), % 0
0 to 0.1
Silicon (Si), % 0 to 0.25
0
Tin (Sn), % 0
7.5 to 8.5
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 7.2 to 8.2
0 to 0.5
Residuals, % 0
0 to 0.3