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7108 Aluminum vs. Nickel 718

7108 aluminum belongs to the aluminum alloys classification, while nickel 718 belongs to the nickel alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, 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 7108 aluminum and the bottom bar is nickel 718.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
190
Elongation at Break, % 11
12 to 50
Fatigue Strength, MPa 120
460 to 760
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
75
Shear Strength, MPa 210
660 to 950
Tensile Strength: Ultimate (UTS), MPa 350
930 to 1530
Tensile Strength: Yield (Proof), MPa 290
510 to 1330

Thermal Properties

Latent Heat of Fusion, J/g 380
310
Maximum Temperature: Mechanical, °C 210
980
Melting Completion (Liquidus), °C 630
1340
Melting Onset (Solidus), °C 530
1260
Specific Heat Capacity, J/kg-K 880
450
Thermal Conductivity, W/m-K 150
11
Thermal Expansion, µm/m-K 24
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 39
1.4
Electrical Conductivity: Equal Weight (Specific), % IACS 120
1.5

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
75
Density, g/cm3 2.9
8.3
Embodied Carbon, kg CO2/kg material 8.3
13
Embodied Energy, MJ/kg 150
190
Embodied Water, L/kg 1150
250

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 38
140 to 390
Resilience: Unit (Modulus of Resilience), kJ/m3 620
660 to 4560
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
23
Strength to Weight: Axial, points 34
31 to 51
Strength to Weight: Bending, points 38
25 to 35
Thermal Diffusivity, mm2/s 59
3.0
Thermal Shock Resistance, points 16
27 to 44

Alloy Composition

Aluminum (Al), % 92.4 to 94.7
0.2 to 0.8
Boron (B), % 0
0 to 0.0060
Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0
17 to 21
Cobalt (Co), % 0
0 to 1.0
Copper (Cu), % 0 to 0.050
0 to 0.3
Iron (Fe), % 0 to 0.1
11.1 to 24.6
Magnesium (Mg), % 0.7 to 1.4
0
Manganese (Mn), % 0 to 0.050
0 to 0.35
Molybdenum (Mo), % 0
2.8 to 3.3
Nickel (Ni), % 0
50 to 55
Niobium (Nb), % 0
4.8 to 5.5
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0 to 0.1
0 to 0.35
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0 to 0.050
0.65 to 1.2
Zinc (Zn), % 4.5 to 5.5
0
Zirconium (Zr), % 0.12 to 0.25
0
Residuals, % 0 to 0.15
0