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EN 2.4964 Cobalt vs. 7022 Aluminum

EN 2.4964 cobalt belongs to the cobalt alloys classification, while 7022 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 7022 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
70
Elongation at Break, % 40
6.3 to 8.0
Fatigue Strength, MPa 220
140 to 170
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 86
26
Tensile Strength: Ultimate (UTS), MPa 960
490 to 540
Tensile Strength: Yield (Proof), MPa 390
390 to 460

Thermal Properties

Latent Heat of Fusion, J/g 290
380
Melting Completion (Liquidus), °C 1630
640
Melting Onset (Solidus), °C 1550
480
Specific Heat Capacity, J/kg-K 400
870
Thermal Conductivity, W/m-K 15
140
Thermal Expansion, µm/m-K 12
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
21
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
65

Otherwise Unclassified Properties

Density, g/cm3 9.6
2.9
Embodied Carbon, kg CO2/kg material 9.8
8.5
Embodied Energy, MJ/kg 140
150
Embodied Water, L/kg 450
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 310
29 to 40
Resilience: Unit (Modulus of Resilience), kJ/m3 340
1100 to 1500
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 21
47
Strength to Weight: Axial, points 28
47 to 51
Strength to Weight: Bending, points 23
47 to 50
Thermal Diffusivity, mm2/s 3.9
54
Thermal Shock Resistance, points 25
21 to 23

Alloy Composition


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Aluminum (Al), % 0
87.9 to 92.4
Carbon (C), % 0.050 to 0.15
0
Chromium (Cr), % 19 to 21
0.1 to 0.3
Cobalt (Co), % 46.4 to 58
0
Copper (Cu), % 0
0.5 to 1.0
Iron (Fe), % 0 to 3.0
0 to 0.5
Magnesium (Mg), % 0
2.6 to 3.7
Manganese (Mn), % 0 to 2.0
0.1 to 0.4
Nickel (Ni), % 9.0 to 11
0
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0 to 0.4
0 to 0.5
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
0 to 0.2
Tungsten (W), % 14 to 16
0
Zinc (Zn), % 0
4.3 to 5.2
Zirconium (Zr), % 0
0 to 0.2
Residuals, % 0
0 to 0.15