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7178 Aluminum vs. Nickel 30

7178 aluminum belongs to the aluminum alloys classification, while nickel 30 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 30.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
210
Elongation at Break, % 4.5 to 12
34
Fatigue Strength, MPa 120 to 210
200
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 27
82
Shear Strength, MPa 140 to 380
440
Tensile Strength: Ultimate (UTS), MPa 240 to 640
660
Tensile Strength: Yield (Proof), MPa 120 to 560
270

Thermal Properties

Latent Heat of Fusion, J/g 370
320
Maximum Temperature: Mechanical, °C 180
1020
Melting Completion (Liquidus), °C 630
1480
Melting Onset (Solidus), °C 480
1430
Specific Heat Capacity, J/kg-K 860
450
Thermal Conductivity, W/m-K 130
10
Thermal Expansion, µm/m-K 23
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 31
1.5
Electrical Conductivity: Equal Weight (Specific), % IACS 91
1.6

Otherwise Unclassified Properties

Base Metal Price, % relative 10
60
Density, g/cm3 3.1
8.5
Embodied Carbon, kg CO2/kg material 8.2
9.4
Embodied Energy, MJ/kg 150
130
Embodied Water, L/kg 1110
290

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24 to 52
180
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 2220
180
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 45
23
Strength to Weight: Axial, points 21 to 58
22
Strength to Weight: Bending, points 28 to 54
20
Thermal Diffusivity, mm2/s 47
2.7
Thermal Shock Resistance, points 10 to 28
18

Alloy Composition

Aluminum (Al), % 85.4 to 89.5
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0.18 to 0.28
28 to 31.5
Cobalt (Co), % 0
0 to 5.0
Copper (Cu), % 1.6 to 2.4
1.0 to 2.4
Iron (Fe), % 0 to 0.5
13 to 17
Magnesium (Mg), % 2.4 to 3.1
0
Manganese (Mn), % 0 to 0.3
0 to 0.030
Molybdenum (Mo), % 0
4.0 to 6.0
Nickel (Ni), % 0
30.2 to 52.2
Niobium (Nb), % 0
0.3 to 1.5
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.4
0 to 0.8
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 0 to 0.2
0
Tungsten (W), % 0
1.5 to 4.0
Zinc (Zn), % 6.3 to 7.3
0
Residuals, % 0 to 0.15
0