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R30816 Cobalt vs. 8090 Aluminum

R30816 cobalt belongs to the cobalt alloys classification, while 8090 aluminum belongs to the aluminum alloys. There are 25 material properties with values for both materials. Properties with values for just one material (7, 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 R30816 cobalt and the bottom bar is 8090 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
67
Elongation at Break, % 23
3.5 to 13
Fatigue Strength, MPa 250
91 to 140
Poisson's Ratio 0.3
0.33
Shear Modulus, GPa 81
25
Tensile Strength: Ultimate (UTS), MPa 1020
340 to 490
Tensile Strength: Yield (Proof), MPa 460
210 to 420

Thermal Properties

Latent Heat of Fusion, J/g 300
400
Melting Completion (Liquidus), °C 1540
660
Melting Onset (Solidus), °C 1460
600
Specific Heat Capacity, J/kg-K 420
960
Thermal Conductivity, W/m-K 13
95 to 160
Thermal Expansion, µm/m-K 12
24

Otherwise Unclassified Properties

Density, g/cm3 9.1
2.7
Embodied Carbon, kg CO2/kg material 20
8.6
Embodied Energy, MJ/kg 320
170
Embodied Water, L/kg 440
1160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
16 to 41
Resilience: Unit (Modulus of Resilience), kJ/m3 510
340 to 1330
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 22
50
Strength to Weight: Axial, points 31
34 to 49
Strength to Weight: Bending, points 25
39 to 50
Thermal Diffusivity, mm2/s 3.3
36 to 60
Thermal Shock Resistance, points 28
15 to 22

Alloy Composition

Aluminum (Al), % 0
93 to 98.4
Carbon (C), % 0.32 to 0.42
0
Chromium (Cr), % 19 to 21
0 to 0.1
Cobalt (Co), % 40 to 49.8
0
Copper (Cu), % 0
1.0 to 1.6
Iron (Fe), % 0 to 5.0
0 to 0.3
Lithium (Li), % 0
2.2 to 2.7
Magnesium (Mg), % 0
0.6 to 1.3
Manganese (Mn), % 1.0 to 2.0
0 to 0.1
Molybdenum (Mo), % 3.5 to 4.5
0
Nickel (Ni), % 19 to 21
0
Niobium (Nb), % 3.5 to 4.5
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 0.2
Sulfur (S), % 0 to 0.030
0
Tantalum (Ta), % 3.5 to 4.5
0
Titanium (Ti), % 0
0 to 0.1
Tungsten (W), % 3.5 to 4.5
0
Zinc (Zn), % 0
0 to 0.25
Zirconium (Zr), % 0
0.040 to 0.16
Residuals, % 0
0 to 0.15