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EN 2.4964 Cobalt vs. EN AC-71100 Aluminum

EN 2.4964 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 (5, 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 EN AC-71100 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
72
Elongation at Break, % 40
1.1
Fatigue Strength, MPa 220
150
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 86
27
Tensile Strength: Ultimate (UTS), MPa 960
260
Tensile Strength: Yield (Proof), MPa 390
230

Thermal Properties

Latent Heat of Fusion, J/g 290
490
Melting Completion (Liquidus), °C 1630
580
Melting Onset (Solidus), °C 1550
520
Specific Heat Capacity, J/kg-K 400
860
Thermal Expansion, µm/m-K 12
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
32
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
97

Otherwise Unclassified Properties

Density, g/cm3 9.6
2.9
Embodied Carbon, kg CO2/kg material 9.8
7.4
Embodied Energy, MJ/kg 140
140
Embodied Water, L/kg 450
1010

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 310
2.8
Resilience: Unit (Modulus of Resilience), kJ/m3 340
360
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 21
47
Strength to Weight: Axial, points 28
25
Strength to Weight: Bending, points 23
31
Thermal Shock Resistance, points 25
12

Alloy Composition

Aluminum (Al), % 0
78.7 to 83.3
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 0.1
Iron (Fe), % 0 to 3.0
0 to 0.3
Magnesium (Mg), % 0
0.2 to 0.5
Manganese (Mn), % 0 to 2.0
0 to 0.15
Nickel (Ni), % 9.0 to 11
0
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0 to 0.4
7.5 to 9.5
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
0 to 0.15
Tungsten (W), % 14 to 16
0
Zinc (Zn), % 0
9.0 to 10.5
Residuals, % 0
0 to 0.15