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2618A Aluminum vs. Nickel 686

2618A aluminum belongs to the aluminum alloys classification, while nickel 686 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 2618A aluminum and the bottom bar is nickel 686.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 72
220
Elongation at Break, % 4.5
51
Fatigue Strength, MPa 120
410
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
77
Shear Strength, MPa 260
560
Tensile Strength: Ultimate (UTS), MPa 440
780
Tensile Strength: Yield (Proof), MPa 410
350

Thermal Properties

Latent Heat of Fusion, J/g 390
320
Maximum Temperature: Mechanical, °C 230
980
Melting Completion (Liquidus), °C 670
1380
Melting Onset (Solidus), °C 560
1340
Specific Heat Capacity, J/kg-K 880
420
Thermal Conductivity, W/m-K 150
9.8
Thermal Expansion, µm/m-K 23
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 37
1.4
Electrical Conductivity: Equal Weight (Specific), % IACS 110
1.4

Otherwise Unclassified Properties

Base Metal Price, % relative 11
70
Density, g/cm3 3.0
9.0
Embodied Carbon, kg CO2/kg material 8.4
12
Embodied Energy, MJ/kg 150
170
Embodied Water, L/kg 1150
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19
320
Resilience: Unit (Modulus of Resilience), kJ/m3 1180
280
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
22
Strength to Weight: Axial, points 41
24
Strength to Weight: Bending, points 44
21
Thermal Diffusivity, mm2/s 59
2.6
Thermal Shock Resistance, points 19
21

Alloy Composition

Aluminum (Al), % 91.5 to 95.2
0
Carbon (C), % 0
0 to 0.010
Chromium (Cr), % 0
19 to 23
Copper (Cu), % 1.8 to 2.7
0
Iron (Fe), % 0.9 to 1.4
0 to 5.0
Magnesium (Mg), % 1.2 to 1.8
0
Manganese (Mn), % 0 to 0.25
0 to 0.75
Molybdenum (Mo), % 0
15 to 17
Nickel (Ni), % 0.8 to 1.4
49.5 to 63
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0.15 to 0.25
0 to 0.080
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 0 to 0.2
0.020 to 0.25
Tungsten (W), % 0
3.0 to 4.4
Zinc (Zn), % 0 to 0.15
0
Zirconium (Zr), % 0 to 0.25
0
Residuals, % 0 to 0.15
0