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771.0 Aluminum vs. EN 2.4964 Cobalt

771.0 aluminum belongs to the aluminum alloys classification, while EN 2.4964 cobalt belongs to the cobalt 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 771.0 aluminum and the bottom bar is EN 2.4964 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
220
Elongation at Break, % 1.7 to 6.5
40
Fatigue Strength, MPa 92 to 180
220
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 26
86
Tensile Strength: Ultimate (UTS), MPa 250 to 370
960
Tensile Strength: Yield (Proof), MPa 210 to 350
390

Thermal Properties

Latent Heat of Fusion, J/g 380
290
Melting Completion (Liquidus), °C 630
1630
Melting Onset (Solidus), °C 620
1550
Specific Heat Capacity, J/kg-K 870
400
Thermal Conductivity, W/m-K 140 to 150
15
Thermal Expansion, µm/m-K 24
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 82
1.8

Otherwise Unclassified Properties

Density, g/cm3 3.0
9.6
Embodied Carbon, kg CO2/kg material 8.0
9.8
Embodied Energy, MJ/kg 150
140
Embodied Water, L/kg 1130
450

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.4 to 20
310
Resilience: Unit (Modulus of Resilience), kJ/m3 310 to 900
340
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
21
Strength to Weight: Axial, points 23 to 35
28
Strength to Weight: Bending, points 29 to 39
23
Thermal Diffusivity, mm2/s 54 to 58
3.9
Thermal Shock Resistance, points 11 to 16
25

Alloy Composition

Aluminum (Al), % 90.5 to 92.5
0
Carbon (C), % 0
0.050 to 0.15
Chromium (Cr), % 0.060 to 0.2
19 to 21
Cobalt (Co), % 0
46.4 to 58
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0 to 0.15
0 to 3.0
Magnesium (Mg), % 0.8 to 1.0
0
Manganese (Mn), % 0 to 0.1
0 to 2.0
Nickel (Ni), % 0
9.0 to 11
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 0.15
0 to 0.4
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0.1 to 0.2
0
Tungsten (W), % 0
14 to 16
Zinc (Zn), % 6.5 to 7.5
0
Residuals, % 0 to 0.15
0