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R30006 Cobalt vs. EN AC-71100 Aluminum

R30006 cobalt belongs to the cobalt alloys classification, while EN AC-71100 aluminum belongs to the aluminum alloys. There are 25 material properties with values for both materials. Properties with values for just one material (8, 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 EN AC-71100 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
72
Elongation at Break, % 1.0
1.1
Fatigue Strength, MPa 260
150
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 85
27
Tensile Strength: Ultimate (UTS), MPa 900
260
Tensile Strength: Yield (Proof), MPa 540
230

Thermal Properties

Latent Heat of Fusion, J/g 320
490
Melting Completion (Liquidus), °C 1400
580
Melting Onset (Solidus), °C 1290
520
Specific Heat Capacity, J/kg-K 450
860
Thermal Expansion, µm/m-K 11
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.6
32
Electrical Conductivity: Equal Weight (Specific), % IACS 1.7
97

Otherwise Unclassified Properties

Density, g/cm3 8.6
2.9
Embodied Carbon, kg CO2/kg material 7.8
7.4
Embodied Energy, MJ/kg 110
140
Embodied Water, L/kg 500
1010

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.8
2.8
Resilience: Unit (Modulus of Resilience), kJ/m3 670
360
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
47
Strength to Weight: Axial, points 29
25
Strength to Weight: Bending, points 24
31
Thermal Shock Resistance, points 26
12

Alloy Composition


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Aluminum (Al), % 0
78.7 to 83.3
Carbon (C), % 0.9 to 1.4
0
Chromium (Cr), % 27 to 32
0
Cobalt (Co), % 48.6 to 68.1
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 0 to 3.0
0 to 0.3
Magnesium (Mg), % 0
0.2 to 0.5
Manganese (Mn), % 0
0 to 0.15
Molybdenum (Mo), % 0 to 1.0
0
Nickel (Ni), % 0 to 3.0
0
Silicon (Si), % 0 to 2.0
7.5 to 9.5
Titanium (Ti), % 0
0 to 0.15
Tungsten (W), % 4.0 to 6.0
0
Zinc (Zn), % 0
9.0 to 10.5
Residuals, % 0
0 to 0.15