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R31537 Cobalt vs. 2007 Aluminum

R31537 cobalt belongs to the cobalt alloys classification, while 2007 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 R31537 cobalt and the bottom bar is 2007 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
71
Elongation at Break, % 14 to 23
5.6 to 8.0
Fatigue Strength, MPa 310 to 480
91 to 110
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 87
27
Tensile Strength: Ultimate (UTS), MPa 1000 to 1340
370 to 420
Tensile Strength: Yield (Proof), MPa 590 to 940
240 to 270

Thermal Properties

Latent Heat of Fusion, J/g 320
390
Melting Completion (Liquidus), °C 1360
640
Melting Onset (Solidus), °C 1290
510
Specific Heat Capacity, J/kg-K 450
870
Thermal Conductivity, W/m-K 13
130
Thermal Expansion, µm/m-K 13
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
47
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
140

Otherwise Unclassified Properties

Density, g/cm3 8.4
3.1
Embodied Carbon, kg CO2/kg material 8.1
8.0
Embodied Energy, MJ/kg 110
150
Embodied Water, L/kg 530
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 200
21 to 26
Resilience: Unit (Modulus of Resilience), kJ/m3 780 to 1990
390 to 530
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 24
44
Strength to Weight: Axial, points 33 to 44
33 to 38
Strength to Weight: Bending, points 26 to 32
37 to 40
Thermal Diffusivity, mm2/s 3.4
48
Thermal Shock Resistance, points 24 to 32
16 to 19

Alloy Composition

Aluminum (Al), % 0
87.5 to 95
Bismuth (Bi), % 0
0 to 0.2
Carbon (C), % 0 to 0.14
0
Chromium (Cr), % 26 to 30
0 to 0.1
Cobalt (Co), % 58.9 to 69
0
Copper (Cu), % 0
3.3 to 4.6
Iron (Fe), % 0 to 0.75
0 to 0.8
Lead (Pb), % 0
0.8 to 1.5
Magnesium (Mg), % 0
0.4 to 1.8
Manganese (Mn), % 0 to 1.0
0.5 to 1.0
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 1.0
0 to 0.2
Nitrogen (N), % 0 to 0.25
0
Silicon (Si), % 0 to 1.0
0 to 0.8
Tin (Sn), % 0
0 to 0.2
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0
0 to 0.8
Residuals, % 0
0 to 0.3