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EN AC-51100 Aluminum vs. R30012 Cobalt

EN AC-51100 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 EN AC-51100 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, % 4.5
1.0
Fatigue Strength, MPa 58
320
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
86
Tensile Strength: Ultimate (UTS), MPa 160
830
Tensile Strength: Yield (Proof), MPa 80
650

Thermal Properties

Latent Heat of Fusion, J/g 400
320
Melting Completion (Liquidus), °C 640
1470
Melting Onset (Solidus), °C 620
1280
Specific Heat Capacity, J/kg-K 900
440
Thermal Conductivity, W/m-K 130
15
Thermal Expansion, µm/m-K 23
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 34
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 110
1.8

Otherwise Unclassified Properties

Density, g/cm3 2.7
8.8
Embodied Carbon, kg CO2/kg material 8.7
8.3
Embodied Energy, MJ/kg 150
120
Embodied Water, L/kg 1180
480

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 6.0
7.7
Resilience: Unit (Modulus of Resilience), kJ/m3 47
960
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 51
23
Strength to Weight: Axial, points 17
26
Strength to Weight: Bending, points 25
22
Thermal Diffusivity, mm2/s 53
3.8
Thermal Shock Resistance, points 7.3
23

Alloy Composition

Aluminum (Al), % 94.5 to 97.5
0
Carbon (C), % 0
1.4 to 2.0
Chromium (Cr), % 0
27 to 32
Cobalt (Co), % 0
47.5 to 64.1
Copper (Cu), % 0 to 0.050
0
Iron (Fe), % 0 to 0.55
0 to 3.0
Magnesium (Mg), % 2.5 to 3.5
0
Manganese (Mn), % 0 to 0.45
0
Molybdenum (Mo), % 0
0 to 1.0
Nickel (Ni), % 0
0 to 3.0
Silicon (Si), % 0 to 0.55
0 to 2.0
Titanium (Ti), % 0 to 0.2
0
Tungsten (W), % 0
7.5 to 9.5
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.15
0