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R30012 Cobalt vs. 5456 Aluminum

R30012 cobalt belongs to the cobalt alloys classification, while 5456 aluminum belongs to the aluminum alloys. There are 27 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 R30012 cobalt and the bottom bar is 5456 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
68
Elongation at Break, % 1.0
11 to 18
Fatigue Strength, MPa 320
130 to 210
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 86
26
Tensile Strength: Ultimate (UTS), MPa 830
320 to 340
Tensile Strength: Yield (Proof), MPa 650
150 to 250

Thermal Properties

Latent Heat of Fusion, J/g 320
390
Melting Completion (Liquidus), °C 1470
640
Melting Onset (Solidus), °C 1280
570
Specific Heat Capacity, J/kg-K 440
900
Thermal Conductivity, W/m-K 15
120
Thermal Expansion, µm/m-K 12
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
29
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
97

Otherwise Unclassified Properties

Density, g/cm3 8.8
2.7
Embodied Carbon, kg CO2/kg material 8.3
9.0
Embodied Energy, MJ/kg 120
150
Embodied Water, L/kg 480
1170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.7
33 to 46
Resilience: Unit (Modulus of Resilience), kJ/m3 960
170 to 470
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
50
Strength to Weight: Axial, points 26
33 to 35
Strength to Weight: Bending, points 22
38 to 40
Thermal Diffusivity, mm2/s 3.8
48
Thermal Shock Resistance, points 23
14 to 15

Alloy Composition

Aluminum (Al), % 0
92 to 94.8
Carbon (C), % 1.4 to 2.0
0
Chromium (Cr), % 27 to 32
0.050 to 0.2
Cobalt (Co), % 47.5 to 64.1
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 0 to 3.0
0 to 0.4
Magnesium (Mg), % 0
4.7 to 5.5
Manganese (Mn), % 0
0.5 to 1.0
Molybdenum (Mo), % 0 to 1.0
0
Nickel (Ni), % 0 to 3.0
0
Silicon (Si), % 0 to 2.0
0 to 0.25
Titanium (Ti), % 0
0 to 0.2
Tungsten (W), % 7.5 to 9.5
0
Zinc (Zn), % 0
0 to 0.25
Residuals, % 0
0 to 0.15