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6018 Aluminum vs. N06985 Nickel

6018 aluminum belongs to the aluminum alloys classification, while N06985 nickel 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 6018 aluminum and the bottom bar is N06985 nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
210
Elongation at Break, % 9.0 to 9.1
45
Fatigue Strength, MPa 85 to 89
220
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
80
Shear Strength, MPa 170 to 180
480
Tensile Strength: Ultimate (UTS), MPa 290 to 300
690
Tensile Strength: Yield (Proof), MPa 220 to 230
260

Thermal Properties

Latent Heat of Fusion, J/g 400
320
Maximum Temperature: Mechanical, °C 160
990
Melting Completion (Liquidus), °C 640
1350
Melting Onset (Solidus), °C 570
1260
Specific Heat Capacity, J/kg-K 890
450
Thermal Conductivity, W/m-K 170
10
Thermal Expansion, µm/m-K 23
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 44
1.5
Electrical Conductivity: Equal Weight (Specific), % IACS 140
1.6

Otherwise Unclassified Properties

Base Metal Price, % relative 10
55
Density, g/cm3 2.9
8.4
Embodied Carbon, kg CO2/kg material 8.2
8.8
Embodied Energy, MJ/kg 150
120
Embodied Water, L/kg 1180
270

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24 to 25
250
Resilience: Unit (Modulus of Resilience), kJ/m3 360 to 380
160
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 48
23
Strength to Weight: Axial, points 28 to 29
23
Strength to Weight: Bending, points 34 to 35
21
Thermal Diffusivity, mm2/s 65
2.6
Thermal Shock Resistance, points 13
16

Alloy Composition

Aluminum (Al), % 93.1 to 97.8
0
Bismuth (Bi), % 0.4 to 0.7
0
Carbon (C), % 0
0 to 0.015
Chromium (Cr), % 0 to 0.1
21 to 23.5
Cobalt (Co), % 0
0 to 5.0
Copper (Cu), % 0.15 to 0.4
1.5 to 2.5
Iron (Fe), % 0 to 0.7
18 to 21
Lead (Pb), % 0.4 to 1.2
0
Magnesium (Mg), % 0.6 to 1.2
0
Manganese (Mn), % 0.3 to 0.8
0 to 1.0
Molybdenum (Mo), % 0
6.0 to 8.0
Nickel (Ni), % 0
35.9 to 53.5
Niobium (Nb), % 0
0 to 0.5
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0.5 to 1.2
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.2
0
Tungsten (W), % 0
0 to 1.5
Zinc (Zn), % 0 to 0.3
0
Residuals, % 0 to 0.15
0