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EN 2.4964 Cobalt vs. 4045 Aluminum

EN 2.4964 cobalt belongs to the cobalt alloys classification, while 4045 aluminum belongs to the aluminum alloys. There are 27 material properties with values for both materials. Properties with values for just one material (4, 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 4045 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
71
Elongation at Break, % 40
2.3
Fatigue Strength, MPa 220
45
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 86
27
Tensile Strength: Ultimate (UTS), MPa 960
120
Tensile Strength: Yield (Proof), MPa 390
64

Thermal Properties

Latent Heat of Fusion, J/g 290
540
Melting Completion (Liquidus), °C 1630
600
Melting Onset (Solidus), °C 1550
580
Specific Heat Capacity, J/kg-K 400
900
Thermal Conductivity, W/m-K 15
170
Thermal Expansion, µm/m-K 12
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
45
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
160

Otherwise Unclassified Properties

Density, g/cm3 9.6
2.6
Embodied Carbon, kg CO2/kg material 9.8
7.8
Embodied Energy, MJ/kg 140
150
Embodied Water, L/kg 450
1070

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 310
2.4
Resilience: Unit (Modulus of Resilience), kJ/m3 340
29
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 21
54
Strength to Weight: Axial, points 28
13
Strength to Weight: Bending, points 23
21
Thermal Diffusivity, mm2/s 3.9
74
Thermal Shock Resistance, points 25
5.7

Alloy Composition

Aluminum (Al), % 0
87.4 to 91
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 to 0.3
Iron (Fe), % 0 to 3.0
0 to 0.8
Magnesium (Mg), % 0
0 to 0.050
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
9.0 to 11
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
0 to 0.2
Tungsten (W), % 14 to 16
0
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.15