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6081 Aluminum vs. Nickel 725

6081 aluminum belongs to the aluminum alloys classification, while nickel 725 belongs to the nickel alloys. There are 28 material properties with values for both materials. Properties with values for just one material (3, 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 6081 aluminum and the bottom bar is nickel 725.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
200
Elongation at Break, % 9.0
34
Fatigue Strength, MPa 110
260
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
78
Shear Strength, MPa 180
580
Tensile Strength: Ultimate (UTS), MPa 310
860
Tensile Strength: Yield (Proof), MPa 270
350

Thermal Properties

Latent Heat of Fusion, J/g 410
320
Maximum Temperature: Mechanical, °C 160
980
Melting Completion (Liquidus), °C 640
1340
Melting Onset (Solidus), °C 610
1270
Specific Heat Capacity, J/kg-K 900
440
Thermal Expansion, µm/m-K 23
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 47
1.5
Electrical Conductivity: Equal Weight (Specific), % IACS 160
1.6

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
75
Density, g/cm3 2.7
8.5
Embodied Carbon, kg CO2/kg material 8.3
13
Embodied Energy, MJ/kg 150
190
Embodied Water, L/kg 1180
270

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 27
240
Resilience: Unit (Modulus of Resilience), kJ/m3 540
300
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 50
23
Strength to Weight: Axial, points 32
28
Strength to Weight: Bending, points 37
24
Thermal Shock Resistance, points 14
23

Alloy Composition

Aluminum (Al), % 96.3 to 98.6
0 to 0.35
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0 to 0.1
19 to 22.5
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0 to 0.5
2.3 to 15.3
Magnesium (Mg), % 0.6 to 1.0
0
Manganese (Mn), % 0.1 to 0.45
0 to 0.35
Molybdenum (Mo), % 0
7.0 to 9.5
Nickel (Ni), % 0
55 to 59
Niobium (Nb), % 0
2.8 to 4.0
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0.7 to 1.1
0 to 0.2
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0 to 0.15
1.0 to 1.7
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.15
0