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R30012 Cobalt vs. 8079 Aluminum

R30012 cobalt belongs to the cobalt alloys classification, while 8079 aluminum belongs to the aluminum alloys. There are 27 material properties with values for both materials. Properties with values for just one material (4, 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 R30012 cobalt and the bottom bar is 8079 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
69
Elongation at Break, % 1.0
2.2
Fatigue Strength, MPa 320
56
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 86
26
Tensile Strength: Ultimate (UTS), MPa 830
150
Tensile Strength: Yield (Proof), MPa 650
120

Thermal Properties

Latent Heat of Fusion, J/g 320
400
Melting Completion (Liquidus), °C 1470
650
Melting Onset (Solidus), °C 1280
640
Specific Heat Capacity, J/kg-K 440
900
Thermal Conductivity, W/m-K 15
230
Thermal Expansion, µm/m-K 12
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
58
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
190

Otherwise Unclassified Properties

Density, g/cm3 8.8
2.8
Embodied Carbon, kg CO2/kg material 8.3
8.2
Embodied Energy, MJ/kg 120
150
Embodied Water, L/kg 480
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.7
3.1
Resilience: Unit (Modulus of Resilience), kJ/m3 960
110
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
50
Strength to Weight: Axial, points 26
15
Strength to Weight: Bending, points 22
22
Thermal Diffusivity, mm2/s 3.8
92
Thermal Shock Resistance, points 23
6.4

Alloy Composition

Aluminum (Al), % 0
98.1 to 99.3
Carbon (C), % 1.4 to 2.0
0
Chromium (Cr), % 27 to 32
0
Cobalt (Co), % 47.5 to 64.1
0
Copper (Cu), % 0
0 to 0.050
Iron (Fe), % 0 to 3.0
0.7 to 1.3
Molybdenum (Mo), % 0 to 1.0
0
Nickel (Ni), % 0 to 3.0
0
Silicon (Si), % 0 to 2.0
0.050 to 0.3
Tungsten (W), % 7.5 to 9.5
0
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.15