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R31538 Cobalt vs. 6063 Aluminum

R31538 cobalt belongs to the cobalt alloys classification, while 6063 aluminum belongs to the aluminum alloys. There are 27 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 R31538 cobalt and the bottom bar is 6063 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
68
Elongation at Break, % 13 to 23
7.3 to 21
Fatigue Strength, MPa 310 to 480
39 to 95
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 86
26
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
110 to 300
Tensile Strength: Yield (Proof), MPa 580 to 930
49 to 270

Thermal Properties

Latent Heat of Fusion, J/g 320
400
Melting Completion (Liquidus), °C 1360
650
Melting Onset (Solidus), °C 1290
620
Specific Heat Capacity, J/kg-K 450
900
Thermal Conductivity, W/m-K 13
190 to 220
Thermal Expansion, µm/m-K 13
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
49 to 58
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
160 to 190

Otherwise Unclassified Properties

Density, g/cm3 8.4
2.7
Embodied Carbon, kg CO2/kg material 8.1
8.3
Embodied Energy, MJ/kg 110
150
Embodied Water, L/kg 530
1190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 200
13 to 27
Resilience: Unit (Modulus of Resilience), kJ/m3 750 to 1920
18 to 540
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
50
Strength to Weight: Axial, points 34 to 45
11 to 31
Strength to Weight: Bending, points 27 to 32
18 to 37
Thermal Diffusivity, mm2/s 3.5
79 to 89
Thermal Shock Resistance, points 25 to 33
4.8 to 13

Alloy Composition


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Aluminum (Al), % 0
97.5 to 99.4
Carbon (C), % 0.15 to 0.35
0
Chromium (Cr), % 26 to 30
0 to 0.1
Cobalt (Co), % 58.7 to 68.9
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 0 to 0.75
0 to 0.35
Magnesium (Mg), % 0
0.45 to 0.9
Manganese (Mn), % 0 to 1.0
0 to 0.1
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 1.0
0
Nitrogen (N), % 0 to 0.25
0
Silicon (Si), % 0 to 1.0
0.2 to 0.6
Titanium (Ti), % 0
0 to 0.1
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.15

Comparable Variants