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7178 Aluminum vs. Nickel 242

7178 aluminum belongs to the aluminum alloys classification, while nickel 242 belongs to the nickel alloys. 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 7178 aluminum and the bottom bar is nickel 242.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
220
Elongation at Break, % 4.5 to 12
45
Fatigue Strength, MPa 120 to 210
300
Poisson's Ratio 0.32
0.3
Shear Modulus, GPa 27
84
Shear Strength, MPa 140 to 380
570
Tensile Strength: Ultimate (UTS), MPa 240 to 640
820
Tensile Strength: Yield (Proof), MPa 120 to 560
350

Thermal Properties

Latent Heat of Fusion, J/g 370
330
Maximum Temperature: Mechanical, °C 180
930
Melting Completion (Liquidus), °C 630
1380
Melting Onset (Solidus), °C 480
1290
Specific Heat Capacity, J/kg-K 860
400
Thermal Conductivity, W/m-K 130
11
Thermal Expansion, µm/m-K 23
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 31
1.4
Electrical Conductivity: Equal Weight (Specific), % IACS 91
1.4

Otherwise Unclassified Properties

Base Metal Price, % relative 10
75
Density, g/cm3 3.1
9.0
Embodied Carbon, kg CO2/kg material 8.2
14
Embodied Energy, MJ/kg 150
180
Embodied Water, L/kg 1110
290

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24 to 52
300
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 2220
280
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 45
22
Strength to Weight: Axial, points 21 to 58
25
Strength to Weight: Bending, points 28 to 54
21
Thermal Diffusivity, mm2/s 47
3.1
Thermal Shock Resistance, points 10 to 28
25

Alloy Composition

Aluminum (Al), % 85.4 to 89.5
0 to 0.5
Boron (B), % 0
0 to 0.0060
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0.18 to 0.28
7.0 to 9.0
Cobalt (Co), % 0
0 to 1.0
Copper (Cu), % 1.6 to 2.4
0 to 0.5
Iron (Fe), % 0 to 0.5
0 to 2.0
Magnesium (Mg), % 2.4 to 3.1
0
Manganese (Mn), % 0 to 0.3
0 to 0.8
Molybdenum (Mo), % 0
24 to 26
Nickel (Ni), % 0
59.3 to 69
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.4
0 to 0.8
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 6.3 to 7.3
0
Residuals, % 0 to 0.15
0