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R30816 Cobalt vs. Sintered 2014 Aluminum

R30816 cobalt belongs to the cobalt alloys classification, while sintered 2014 aluminum belongs to the aluminum alloys. There are 25 material properties with values for both materials. Properties with values for just one material (6, 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 sintered 2014 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
70
Elongation at Break, % 23
0.5 to 3.0
Fatigue Strength, MPa 250
52 to 100
Poisson's Ratio 0.3
0.33
Shear Modulus, GPa 81
26
Tensile Strength: Ultimate (UTS), MPa 1020
140 to 290
Tensile Strength: Yield (Proof), MPa 460
97 to 280

Thermal Properties

Latent Heat of Fusion, J/g 300
390
Melting Completion (Liquidus), °C 1540
650
Melting Onset (Solidus), °C 1460
560
Specific Heat Capacity, J/kg-K 420
880
Thermal Conductivity, W/m-K 13
130
Thermal Expansion, µm/m-K 12
23

Otherwise Unclassified Properties

Density, g/cm3 9.1
2.9
Embodied Carbon, kg CO2/kg material 20
8.0
Embodied Energy, MJ/kg 320
150
Embodied Water, L/kg 440
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
1.0 to 5.7
Resilience: Unit (Modulus of Resilience), kJ/m3 510
68 to 560
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 22
47
Strength to Weight: Axial, points 31
13 to 27
Strength to Weight: Bending, points 25
20 to 33
Thermal Diffusivity, mm2/s 3.3
51
Thermal Shock Resistance, points 28
6.2 to 13

Alloy Composition

Aluminum (Al), % 0
91.5 to 96.3
Carbon (C), % 0.32 to 0.42
0
Chromium (Cr), % 19 to 21
0
Cobalt (Co), % 40 to 49.8
0
Copper (Cu), % 0
3.5 to 5.0
Iron (Fe), % 0 to 5.0
0
Magnesium (Mg), % 0
0.2 to 0.8
Manganese (Mn), % 1.0 to 2.0
0
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 1.2
Sulfur (S), % 0 to 0.030
0
Tantalum (Ta), % 3.5 to 4.5
0
Tungsten (W), % 3.5 to 4.5
0
Residuals, % 0
0 to 1.5