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EN 2.4964 Cobalt vs. 7108A Aluminum

EN 2.4964 cobalt belongs to the cobalt alloys classification, while 7108A aluminum belongs to the aluminum alloys. There are 27 material properties with values for both materials. Properties with values for just one material (3, 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 2.4964 cobalt and the bottom bar is 7108A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
69
Elongation at Break, % 40
11 to 13
Fatigue Strength, MPa 220
120 to 130
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 86
26
Tensile Strength: Ultimate (UTS), MPa 960
350
Tensile Strength: Yield (Proof), MPa 390
290 to 300

Thermal Properties

Latent Heat of Fusion, J/g 290
380
Melting Completion (Liquidus), °C 1630
630
Melting Onset (Solidus), °C 1550
520
Specific Heat Capacity, J/kg-K 400
870
Thermal Conductivity, W/m-K 15
150
Thermal Expansion, µm/m-K 12
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
36
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
110

Otherwise Unclassified Properties

Density, g/cm3 9.6
2.9
Embodied Carbon, kg CO2/kg material 9.8
8.3
Embodied Energy, MJ/kg 140
150
Embodied Water, L/kg 450
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 310
38 to 44
Resilience: Unit (Modulus of Resilience), kJ/m3 340
610 to 640
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 21
47
Strength to Weight: Axial, points 28
33 to 34
Strength to Weight: Bending, points 23
38
Thermal Diffusivity, mm2/s 3.9
59
Thermal Shock Resistance, points 25
15 to 16

Alloy Composition

Aluminum (Al), % 0
91.6 to 94.4
Carbon (C), % 0.050 to 0.15
0
Chromium (Cr), % 19 to 21
0 to 0.040
Cobalt (Co), % 46.4 to 58
0
Copper (Cu), % 0
0 to 0.050
Gallium (Ga), % 0
0 to 0.030
Iron (Fe), % 0 to 3.0
0 to 0.3
Magnesium (Mg), % 0
0.7 to 1.5
Manganese (Mn), % 0 to 2.0
0 to 0.050
Nickel (Ni), % 9.0 to 11
0
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0 to 0.4
0 to 0.2
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
0 to 0.030
Tungsten (W), % 14 to 16
0
Zinc (Zn), % 0
4.8 to 5.8
Zirconium (Zr), % 0
0.15 to 0.25
Residuals, % 0
0 to 0.15