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R30006 Cobalt vs. 2124 Aluminum

R30006 cobalt belongs to the cobalt alloys classification, while 2124 aluminum belongs to the aluminum alloys. There are 27 material properties with values for both materials. Properties with values for just one material (6, 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 R30006 cobalt and the bottom bar is 2124 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
71
Elongation at Break, % 1.0
5.7
Fatigue Strength, MPa 260
130
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 85
27
Tensile Strength: Ultimate (UTS), MPa 900
490
Tensile Strength: Yield (Proof), MPa 540
430

Thermal Properties

Latent Heat of Fusion, J/g 320
390
Melting Completion (Liquidus), °C 1400
640
Melting Onset (Solidus), °C 1290
500
Specific Heat Capacity, J/kg-K 450
880
Thermal Conductivity, W/m-K 15
150
Thermal Expansion, µm/m-K 11
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.6
38
Electrical Conductivity: Equal Weight (Specific), % IACS 1.7
110

Otherwise Unclassified Properties

Density, g/cm3 8.6
3.0
Embodied Carbon, kg CO2/kg material 7.8
8.2
Embodied Energy, MJ/kg 110
150
Embodied Water, L/kg 500
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.8
27
Resilience: Unit (Modulus of Resilience), kJ/m3 670
1290
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
46
Strength to Weight: Axial, points 29
45
Strength to Weight: Bending, points 24
46
Thermal Diffusivity, mm2/s 3.9
58
Thermal Shock Resistance, points 26
21

Alloy Composition


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Aluminum (Al), % 0
91.3 to 94.7
Carbon (C), % 0.9 to 1.4
0
Chromium (Cr), % 27 to 32
0 to 0.1
Cobalt (Co), % 48.6 to 68.1
0
Copper (Cu), % 0
3.8 to 4.9
Iron (Fe), % 0 to 3.0
0 to 0.3
Magnesium (Mg), % 0
1.2 to 1.8
Manganese (Mn), % 0
0.3 to 0.9
Molybdenum (Mo), % 0 to 1.0
0
Nickel (Ni), % 0 to 3.0
0
Silicon (Si), % 0 to 2.0
0 to 0.2
Titanium (Ti), % 0
0 to 0.15
Tungsten (W), % 4.0 to 6.0
0
Zinc (Zn), % 0
0 to 0.25
Residuals, % 0
0 to 0.15