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R31538 Cobalt vs. 6005A Aluminum

R31538 cobalt belongs to the cobalt alloys classification, while 6005A 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 R31538 cobalt and the bottom bar is 6005A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
69
Elongation at Break, % 13 to 23
8.6 to 17
Fatigue Strength, MPa 310 to 480
55 to 110
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 86
26
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
190 to 300
Tensile Strength: Yield (Proof), MPa 580 to 930
100 to 270

Thermal Properties

Latent Heat of Fusion, J/g 320
410
Melting Completion (Liquidus), °C 1360
650
Melting Onset (Solidus), °C 1290
600
Specific Heat Capacity, J/kg-K 450
900
Thermal Conductivity, W/m-K 13
180 to 190
Thermal Expansion, µm/m-K 13
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
47 to 50
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
150 to 170

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
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 200
24 to 29
Resilience: Unit (Modulus of Resilience), kJ/m3 750 to 1920
76 to 530
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
50
Strength to Weight: Axial, points 34 to 45
20 to 30
Strength to Weight: Bending, points 27 to 32
27 to 36
Thermal Diffusivity, mm2/s 3.5
72 to 79
Thermal Shock Resistance, points 25 to 33
8.6 to 13

Alloy Composition


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Aluminum (Al), % 0
96.5 to 99.1
Carbon (C), % 0.15 to 0.35
0
Chromium (Cr), % 26 to 30
0 to 0.3
Cobalt (Co), % 58.7 to 68.9
0
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 0 to 0.75
0 to 0.35
Magnesium (Mg), % 0
0.4 to 0.7
Manganese (Mn), % 0 to 1.0
0 to 0.5
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
0.5 to 0.9
Titanium (Ti), % 0
0 to 0.1
Zinc (Zn), % 0
0 to 0.2
Residuals, % 0
0 to 0.15