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EN AC-48100 Aluminum vs. R31539 Cobalt

EN AC-48100 aluminum belongs to the aluminum alloys classification, while R31539 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-48100 aluminum and the bottom bar is R31539 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 76
220
Elongation at Break, % 1.1
13 to 22
Fatigue Strength, MPa 120 to 130
310 to 480
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 29
86
Tensile Strength: Ultimate (UTS), MPa 240 to 330
1000 to 1340
Tensile Strength: Yield (Proof), MPa 190 to 300
590 to 940

Thermal Properties

Latent Heat of Fusion, J/g 640
320
Melting Completion (Liquidus), °C 580
1360
Melting Onset (Solidus), °C 470
1290
Specific Heat Capacity, J/kg-K 880
450
Thermal Conductivity, W/m-K 130
13
Thermal Expansion, µm/m-K 20
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 87
2.1

Otherwise Unclassified Properties

Density, g/cm3 2.8
8.4
Embodied Carbon, kg CO2/kg material 7.3
8.2
Embodied Energy, MJ/kg 130
110
Embodied Water, L/kg 940
530

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.3 to 3.6
140 to 190
Resilience: Unit (Modulus of Resilience), kJ/m3 250 to 580
780 to 2000
Stiffness to Weight: Axial, points 15
15
Stiffness to Weight: Bending, points 51
24
Strength to Weight: Axial, points 24 to 33
33 to 44
Strength to Weight: Bending, points 31 to 38
27 to 32
Thermal Diffusivity, mm2/s 55
3.5
Thermal Shock Resistance, points 11 to 16
24 to 32

Alloy Composition


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Aluminum (Al), % 72.1 to 79.8
0.3 to 1.0
Carbon (C), % 0
0 to 0.14
Chromium (Cr), % 0
26 to 30
Cobalt (Co), % 0
57.7 to 68.7
Copper (Cu), % 4.0 to 5.0
0
Iron (Fe), % 0 to 1.3
0 to 0.75
Lanthanum (La), % 0
0.030 to 0.2
Magnesium (Mg), % 0.25 to 0.65
0
Manganese (Mn), % 0 to 0.5
0 to 1.0
Molybdenum (Mo), % 0
5.0 to 7.0
Nickel (Ni), % 0 to 0.3
0 to 1.0
Nitrogen (N), % 0
0 to 0.25
Silicon (Si), % 16 to 18
0 to 1.0
Tin (Sn), % 0 to 0.15
0
Titanium (Ti), % 0 to 0.25
0
Zinc (Zn), % 0 to 1.5
0
Residuals, % 0 to 0.25
0