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EN 2.4964 Cobalt vs. 7005 Aluminum

EN 2.4964 cobalt belongs to the cobalt alloys classification, while 7005 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 7005 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
70
Elongation at Break, % 40
10 to 20
Fatigue Strength, MPa 220
100 to 190
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 86
26
Tensile Strength: Ultimate (UTS), MPa 960
200 to 400
Tensile Strength: Yield (Proof), MPa 390
95 to 350

Thermal Properties

Latent Heat of Fusion, J/g 290
380
Melting Completion (Liquidus), °C 1630
640
Melting Onset (Solidus), °C 1550
610
Specific Heat Capacity, J/kg-K 400
880
Thermal Conductivity, W/m-K 15
140 to 170
Thermal Expansion, µm/m-K 12
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
35 to 43
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
110 to 130

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
32 to 57
Resilience: Unit (Modulus of Resilience), kJ/m3 340
65 to 850
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 21
47
Strength to Weight: Axial, points 28
19 to 38
Strength to Weight: Bending, points 23
26 to 41
Thermal Diffusivity, mm2/s 3.9
54 to 65
Thermal Shock Resistance, points 25
8.7 to 18

Alloy Composition

Aluminum (Al), % 0
91 to 94.7
Carbon (C), % 0.050 to 0.15
0
Chromium (Cr), % 19 to 21
0.060 to 0.2
Cobalt (Co), % 46.4 to 58
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 0 to 3.0
0 to 0.4
Magnesium (Mg), % 0
1.0 to 1.8
Manganese (Mn), % 0 to 2.0
0.2 to 0.7
Nickel (Ni), % 9.0 to 11
0
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0 to 0.4
0 to 0.35
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
0.010 to 0.060
Tungsten (W), % 14 to 16
0
Zinc (Zn), % 0
4.0 to 5.0
Zirconium (Zr), % 0
0.080 to 0.2
Residuals, % 0
0 to 0.15