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5182 Aluminum vs. R30012 Cobalt

5182 aluminum belongs to the aluminum alloys classification, while R30012 cobalt belongs to the cobalt 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 5182 aluminum and the bottom bar is R30012 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
220
Elongation at Break, % 1.1 to 12
1.0
Fatigue Strength, MPa 100 to 130
320
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 25
86
Tensile Strength: Ultimate (UTS), MPa 280 to 420
830
Tensile Strength: Yield (Proof), MPa 130 to 360
650

Thermal Properties

Latent Heat of Fusion, J/g 390
320
Melting Completion (Liquidus), °C 640
1470
Melting Onset (Solidus), °C 590
1280
Specific Heat Capacity, J/kg-K 900
440
Thermal Conductivity, W/m-K 130
15
Thermal Expansion, µm/m-K 24
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 28
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 94
1.8

Otherwise Unclassified Properties

Density, g/cm3 2.7
8.8
Embodied Carbon, kg CO2/kg material 8.9
8.3
Embodied Energy, MJ/kg 150
120
Embodied Water, L/kg 1180
480

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.6 to 49
7.7
Resilience: Unit (Modulus of Resilience), kJ/m3 120 to 950
960
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 51
23
Strength to Weight: Axial, points 29 to 44
26
Strength to Weight: Bending, points 36 to 47
22
Thermal Diffusivity, mm2/s 53
3.8
Thermal Shock Resistance, points 12 to 19
23

Alloy Composition


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Aluminum (Al), % 93.2 to 95.8
0
Carbon (C), % 0
1.4 to 2.0
Chromium (Cr), % 0 to 0.1
27 to 32
Cobalt (Co), % 0
47.5 to 64.1
Copper (Cu), % 0 to 0.15
0
Iron (Fe), % 0 to 0.35
0 to 3.0
Magnesium (Mg), % 4.0 to 5.0
0
Manganese (Mn), % 0.2 to 0.5
0
Molybdenum (Mo), % 0
0 to 1.0
Nickel (Ni), % 0
0 to 3.0
Silicon (Si), % 0 to 0.2
0 to 2.0
Titanium (Ti), % 0 to 0.1
0
Tungsten (W), % 0
7.5 to 9.5
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0 to 0.15
0