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EN AC-44100 Aluminum vs. R31538 Cobalt

EN AC-44100 aluminum belongs to the aluminum alloys classification, while R31538 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-44100 aluminum and the bottom bar is R31538 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 72
220
Elongation at Break, % 4.9
13 to 23
Fatigue Strength, MPa 64
310 to 480
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
86
Tensile Strength: Ultimate (UTS), MPa 180
1020 to 1360
Tensile Strength: Yield (Proof), MPa 87
580 to 930

Thermal Properties

Latent Heat of Fusion, J/g 570
320
Melting Completion (Liquidus), °C 590
1360
Melting Onset (Solidus), °C 580
1290
Specific Heat Capacity, J/kg-K 900
450
Thermal Conductivity, W/m-K 130
13
Thermal Expansion, µm/m-K 21
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 34
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 120
2.1

Otherwise Unclassified Properties

Density, g/cm3 2.5
8.4
Embodied Carbon, kg CO2/kg material 7.7
8.1
Embodied Energy, MJ/kg 140
110
Embodied Water, L/kg 1050
530

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.1
140 to 200
Resilience: Unit (Modulus of Resilience), kJ/m3 53
750 to 1920
Stiffness to Weight: Axial, points 16
15
Stiffness to Weight: Bending, points 55
24
Strength to Weight: Axial, points 19
34 to 45
Strength to Weight: Bending, points 27
27 to 32
Thermal Diffusivity, mm2/s 58
3.5
Thermal Shock Resistance, points 8.2
25 to 33

Alloy Composition

Aluminum (Al), % 84.4 to 89.5
0
Carbon (C), % 0
0.15 to 0.35
Chromium (Cr), % 0
26 to 30
Cobalt (Co), % 0
58.7 to 68.9
Copper (Cu), % 0 to 0.15
0
Iron (Fe), % 0 to 0.65
0 to 0.75
Lead (Pb), % 0 to 0.1
0
Magnesium (Mg), % 0 to 0.1
0
Manganese (Mn), % 0 to 0.55
0 to 1.0
Molybdenum (Mo), % 0
5.0 to 7.0
Nickel (Ni), % 0 to 0.1
0 to 1.0
Nitrogen (N), % 0
0 to 0.25
Silicon (Si), % 10.5 to 13.5
0 to 1.0
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 0 to 0.15
0
Residuals, % 0 to 0.15
0