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515.0 Aluminum vs. R31539 Cobalt

515.0 aluminum belongs to the aluminum alloys classification, while R31539 cobalt belongs to the cobalt alloys. There are 20 material properties with values for both materials. Properties with values for just one material (12, 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 515.0 aluminum and the bottom bar is R31539 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
220
Elongation at Break, % 10
13 to 22
Fatigue Strength, MPa 130
310 to 480
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
86
Tensile Strength: Ultimate (UTS), MPa 280
1000 to 1340

Thermal Properties

Latent Heat of Fusion, J/g 470
320
Melting Completion (Liquidus), °C 620
1360
Melting Onset (Solidus), °C 620
1290
Specific Heat Capacity, J/kg-K 900
450
Thermal Expansion, µm/m-K 23
13

Otherwise Unclassified Properties

Density, g/cm3 2.6
8.4
Embodied Carbon, kg CO2/kg material 8.4
8.2
Embodied Energy, MJ/kg 150
110
Embodied Water, L/kg 1120
530

Common Calculations

Stiffness to Weight: Axial, points 15
15
Stiffness to Weight: Bending, points 52
24
Strength to Weight: Axial, points 30
33 to 44
Strength to Weight: Bending, points 36
27 to 32
Thermal Shock Resistance, points 13
24 to 32

Alloy Composition

Aluminum (Al), % 93.6 to 96.6
0.3 to 1.0
Carbon (C), % 0
0 to 0.14
Chromium (Cr), % 0
26 to 30
Cobalt (Co), % 0
57.7 to 68.7
Copper (Cu), % 0 to 0.2
0
Iron (Fe), % 0 to 1.3
0 to 0.75
Lanthanum (La), % 0
0.030 to 0.2
Magnesium (Mg), % 2.5 to 4.0
0
Manganese (Mn), % 0.4 to 0.6
0 to 1.0
Molybdenum (Mo), % 0
5.0 to 7.0
Nickel (Ni), % 0
0 to 1.0
Nitrogen (N), % 0
0 to 0.25
Silicon (Si), % 0.5 to 10
0 to 1.0
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.15
0