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EN 2.4964 Cobalt vs. 851.0 Aluminum

EN 2.4964 cobalt belongs to the cobalt alloys classification, while 851.0 aluminum belongs to the aluminum alloys. There are 23 material properties with values for both materials. Properties with values for just one material (7, 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 851.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
69
Elongation at Break, % 40
3.9 to 9.1
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 86
26
Tensile Strength: Ultimate (UTS), MPa 960
130 to 140

Thermal Properties

Latent Heat of Fusion, J/g 290
410
Melting Completion (Liquidus), °C 1630
630
Melting Onset (Solidus), °C 1550
360
Specific Heat Capacity, J/kg-K 400
850
Thermal Conductivity, W/m-K 15
180
Thermal Expansion, µm/m-K 12
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
46
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
140

Otherwise Unclassified Properties

Density, g/cm3 9.6
3.1
Embodied Carbon, kg CO2/kg material 9.8
8.4
Embodied Energy, MJ/kg 140
160
Embodied Water, L/kg 450
1140

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 21
45
Strength to Weight: Axial, points 28
12 to 13
Strength to Weight: Bending, points 23
19 to 20
Thermal Diffusivity, mm2/s 3.9
69
Thermal Shock Resistance, points 25
6.1 to 6.3

Alloy Composition


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Aluminum (Al), % 0
86.6 to 91.5
Carbon (C), % 0.050 to 0.15
0
Chromium (Cr), % 19 to 21
0
Cobalt (Co), % 46.4 to 58
0
Copper (Cu), % 0
0.7 to 1.3
Iron (Fe), % 0 to 3.0
0 to 0.7
Magnesium (Mg), % 0
0 to 0.1
Manganese (Mn), % 0 to 2.0
0 to 0.1
Nickel (Ni), % 9.0 to 11
0.3 to 0.7
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0 to 0.4
2.0 to 3.0
Sulfur (S), % 0 to 0.015
0
Tin (Sn), % 0
5.5 to 7.0
Titanium (Ti), % 0
0 to 0.2
Tungsten (W), % 14 to 16
0
Residuals, % 0
0 to 0.3