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R31537 Cobalt vs. 6182 Aluminum

R31537 cobalt belongs to the cobalt alloys classification, while 6182 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 6182 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
70
Elongation at Break, % 14 to 23
6.8 to 13
Fatigue Strength, MPa 310 to 480
63 to 99
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 87
26
Tensile Strength: Ultimate (UTS), MPa 1000 to 1340
230 to 320
Tensile Strength: Yield (Proof), MPa 590 to 940
130 to 270

Thermal Properties

Latent Heat of Fusion, J/g 320
410
Melting Completion (Liquidus), °C 1360
640
Melting Onset (Solidus), °C 1290
600
Specific Heat Capacity, J/kg-K 450
900
Thermal Conductivity, W/m-K 13
160
Thermal Expansion, µm/m-K 13
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
40
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
130

Otherwise Unclassified Properties

Density, g/cm3 8.4
2.7
Embodied Carbon, kg CO2/kg material 8.1
8.4
Embodied Energy, MJ/kg 110
150
Embodied Water, L/kg 530
1170

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
110 to 520
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
50
Strength to Weight: Axial, points 33 to 44
23 to 32
Strength to Weight: Bending, points 26 to 32
30 to 38
Thermal Diffusivity, mm2/s 3.4
65
Thermal Shock Resistance, points 24 to 32
10 to 14

Alloy Composition

Aluminum (Al), % 0
95 to 97.9
Carbon (C), % 0 to 0.14
0
Chromium (Cr), % 26 to 30
0 to 0.25
Cobalt (Co), % 58.9 to 69
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 0 to 0.75
0 to 0.5
Magnesium (Mg), % 0
0.7 to 1.2
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
Nitrogen (N), % 0 to 0.25
0
Silicon (Si), % 0 to 1.0
0.9 to 1.3
Titanium (Ti), % 0
0 to 0.1
Zinc (Zn), % 0
0 to 0.2
Zirconium (Zr), % 0
0.050 to 0.2
Residuals, % 0
0 to 0.15