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7050 Aluminum vs. C72700 Copper-nickel

7050 aluminum belongs to the aluminum alloys classification, while C72700 copper-nickel belongs to the copper alloys. There are 29 material properties with values for both materials. Properties with values for just one material (1, 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 7050 aluminum and the bottom bar is C72700 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
120
Elongation at Break, % 2.2 to 12
4.0 to 36
Poisson's Ratio 0.32
0.34
Shear Modulus, GPa 26
44
Shear Strength, MPa 280 to 330
310 to 620
Tensile Strength: Ultimate (UTS), MPa 490 to 570
460 to 1070
Tensile Strength: Yield (Proof), MPa 390 to 500
580 to 1060

Thermal Properties

Latent Heat of Fusion, J/g 370
210
Maximum Temperature: Mechanical, °C 190
200
Melting Completion (Liquidus), °C 630
1100
Melting Onset (Solidus), °C 490
930
Specific Heat Capacity, J/kg-K 860
380
Thermal Conductivity, W/m-K 140
54
Thermal Expansion, µm/m-K 24
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 35
11
Electrical Conductivity: Equal Weight (Specific), % IACS 100
11

Otherwise Unclassified Properties

Base Metal Price, % relative 10
36
Density, g/cm3 3.1
8.8
Embodied Carbon, kg CO2/kg material 8.2
4.0
Embodied Energy, MJ/kg 150
62
Embodied Water, L/kg 1120
350

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 10 to 55
20 to 380
Resilience: Unit (Modulus of Resilience), kJ/m3 1110 to 1760
1420 to 4770
Stiffness to Weight: Axial, points 13
7.4
Stiffness to Weight: Bending, points 45
19
Strength to Weight: Axial, points 45 to 51
14 to 34
Strength to Weight: Bending, points 45 to 50
15 to 26
Thermal Diffusivity, mm2/s 54
16
Thermal Shock Resistance, points 21 to 25
16 to 38

Alloy Composition

Aluminum (Al), % 87.3 to 92.1
0
Chromium (Cr), % 0 to 0.040
0
Copper (Cu), % 2.0 to 2.6
82.1 to 86
Iron (Fe), % 0 to 0.15
0 to 0.5
Lead (Pb), % 0
0 to 0.020
Magnesium (Mg), % 1.9 to 2.6
0 to 0.15
Manganese (Mn), % 0 to 0.1
0.050 to 0.3
Nickel (Ni), % 0
8.5 to 9.5
Niobium (Nb), % 0
0 to 0.1
Silicon (Si), % 0 to 0.12
0
Tin (Sn), % 0
5.5 to 6.5
Titanium (Ti), % 0 to 0.060
0
Zinc (Zn), % 5.7 to 6.7
0 to 0.5
Zirconium (Zr), % 0.080 to 0.15
0
Residuals, % 0
0 to 0.3