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R30012 Cobalt vs. 8176 Aluminum

R30012 cobalt belongs to the cobalt alloys classification, while 8176 aluminum belongs to the aluminum alloys. There are 27 material properties with values for both materials. Properties with values for just one material (5, 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 8176 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
69
Elongation at Break, % 1.0
15
Fatigue Strength, MPa 320
59
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 86
26
Tensile Strength: Ultimate (UTS), MPa 830
160
Tensile Strength: Yield (Proof), MPa 650
95

Thermal Properties

Latent Heat of Fusion, J/g 320
400
Melting Completion (Liquidus), °C 1470
660
Melting Onset (Solidus), °C 1280
650
Specific Heat Capacity, J/kg-K 440
900
Thermal Conductivity, W/m-K 15
230
Thermal Expansion, µm/m-K 12
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
61
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
200

Otherwise Unclassified Properties

Density, g/cm3 8.8
2.7
Embodied Carbon, kg CO2/kg material 8.3
8.2
Embodied Energy, MJ/kg 120
150
Embodied Water, L/kg 480
1190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.7
21
Resilience: Unit (Modulus of Resilience), kJ/m3 960
66
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
50
Strength to Weight: Axial, points 26
16
Strength to Weight: Bending, points 22
24
Thermal Diffusivity, mm2/s 3.8
93
Thermal Shock Resistance, points 23
7.0

Alloy Composition

Aluminum (Al), % 0
98.6 to 99.6
Carbon (C), % 1.4 to 2.0
0
Chromium (Cr), % 27 to 32
0
Cobalt (Co), % 47.5 to 64.1
0
Gallium (Ga), % 0
0 to 0.030
Iron (Fe), % 0 to 3.0
0.4 to 1.0
Molybdenum (Mo), % 0 to 1.0
0
Nickel (Ni), % 0 to 3.0
0
Silicon (Si), % 0 to 2.0
0.030 to 0.15
Tungsten (W), % 7.5 to 9.5
0
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.15