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5040 Aluminum vs. R30016 Cobalt

5040 aluminum belongs to the aluminum alloys classification, while R30016 cobalt belongs to the cobalt alloys. There are 27 material properties with values for both materials. Properties with values for just one material (9, 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 5040 aluminum and the bottom bar is R30016 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
220
Elongation at Break, % 5.7 to 6.8
8.4
Fatigue Strength, MPa 100 to 130
290
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
85
Tensile Strength: Ultimate (UTS), MPa 240 to 260
1010
Tensile Strength: Yield (Proof), MPa 190 to 230
580

Thermal Properties

Latent Heat of Fusion, J/g 400
320
Melting Completion (Liquidus), °C 650
1360
Melting Onset (Solidus), °C 600
1270
Specific Heat Capacity, J/kg-K 900
450
Thermal Conductivity, W/m-K 160
15
Thermal Expansion, µm/m-K 23
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 41
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 130
2.0

Otherwise Unclassified Properties

Density, g/cm3 2.8
8.5
Embodied Carbon, kg CO2/kg material 8.3
7.7
Embodied Energy, MJ/kg 150
110
Embodied Water, L/kg 1180
500

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 14 to 15
72
Resilience: Unit (Modulus of Resilience), kJ/m3 260 to 380
770
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
24
Strength to Weight: Axial, points 24 to 26
33
Strength to Weight: Bending, points 31 to 32
26
Thermal Diffusivity, mm2/s 64
3.9
Thermal Shock Resistance, points 10 to 11
24

Alloy Composition

Aluminum (Al), % 95.2 to 98
0
Carbon (C), % 0
0.9 to 1.4
Chromium (Cr), % 0.1 to 0.3
28 to 32
Cobalt (Co), % 0
49.6 to 66.9
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 0 to 0.7
0 to 3.0
Magnesium (Mg), % 1.0 to 1.5
0
Manganese (Mn), % 0.9 to 1.4
0.5 to 2.0
Molybdenum (Mo), % 0
0 to 1.5
Nickel (Ni), % 0
0 to 3.0
Silicon (Si), % 0 to 0.3
0.2 to 2.0
Tungsten (W), % 0
3.5 to 5.5
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0 to 0.15
0