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R30006 Cobalt vs. 3105 Aluminum

R30006 cobalt belongs to the cobalt alloys classification, while 3105 aluminum belongs to the aluminum alloys. There are 28 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 3105 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
69
Elongation at Break, % 1.0
1.1 to 20
Fatigue Strength, MPa 260
39 to 95
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 85
26
Tensile Strength: Ultimate (UTS), MPa 900
120 to 240
Tensile Strength: Yield (Proof), MPa 540
46 to 220

Thermal Properties

Latent Heat of Fusion, J/g 320
400
Melting Completion (Liquidus), °C 1400
660
Melting Onset (Solidus), °C 1290
640
Specific Heat Capacity, J/kg-K 450
900
Thermal Conductivity, W/m-K 15
170
Thermal Expansion, µm/m-K 11
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.6
44
Electrical Conductivity: Equal Weight (Specific), % IACS 1.7
140

Otherwise Unclassified Properties

Calomel Potential, mV -250
-750
Density, g/cm3 8.6
2.8
Embodied Carbon, kg CO2/kg material 7.8
8.2
Embodied Energy, MJ/kg 110
150
Embodied Water, L/kg 500
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.8
2.6 to 19
Resilience: Unit (Modulus of Resilience), kJ/m3 670
15 to 340
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
50
Strength to Weight: Axial, points 29
12 to 24
Strength to Weight: Bending, points 24
20 to 31
Thermal Diffusivity, mm2/s 3.9
68
Thermal Shock Resistance, points 26
5.2 to 11

Alloy Composition

Aluminum (Al), % 0
96 to 99.5
Carbon (C), % 0.9 to 1.4
0
Chromium (Cr), % 27 to 32
0 to 0.2
Cobalt (Co), % 48.6 to 68.1
0
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 0 to 3.0
0 to 0.7
Magnesium (Mg), % 0
0.2 to 0.8
Manganese (Mn), % 0
0.3 to 0.8
Molybdenum (Mo), % 0 to 1.0
0
Nickel (Ni), % 0 to 3.0
0
Silicon (Si), % 0 to 2.0
0 to 0.6
Titanium (Ti), % 0
0 to 0.1
Tungsten (W), % 4.0 to 6.0
0
Zinc (Zn), % 0
0 to 0.4
Residuals, % 0
0 to 0.15