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EN 2.4964 Cobalt vs. 771.0 Aluminum

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

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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