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201.0 Aluminum vs. R31537 Cobalt

201.0 aluminum belongs to the aluminum alloys classification, while R31537 cobalt belongs to the cobalt alloys. There are 26 material properties with values for both materials. Properties with values for just one material (10, 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 201.0 aluminum and the bottom bar is R31537 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
220
Elongation at Break, % 4.4 to 20
14 to 23
Fatigue Strength, MPa 120 to 150
310 to 480
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
87
Tensile Strength: Ultimate (UTS), MPa 370 to 470
1000 to 1340
Tensile Strength: Yield (Proof), MPa 220 to 400
590 to 940

Thermal Properties

Latent Heat of Fusion, J/g 390
320
Melting Completion (Liquidus), °C 650
1360
Melting Onset (Solidus), °C 570
1290
Specific Heat Capacity, J/kg-K 870
450
Thermal Conductivity, W/m-K 120
13
Thermal Expansion, µm/m-K 19
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 30 to 33
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 87 to 97
2.1

Otherwise Unclassified Properties

Density, g/cm3 3.1
8.4
Embodied Carbon, kg CO2/kg material 8.7
8.1
Embodied Energy, MJ/kg 160
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19 to 63
140 to 200
Resilience: Unit (Modulus of Resilience), kJ/m3 330 to 1160
780 to 1990
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 45
24
Strength to Weight: Axial, points 33 to 42
33 to 44
Strength to Weight: Bending, points 37 to 44
26 to 32
Thermal Diffusivity, mm2/s 45
3.4
Thermal Shock Resistance, points 19 to 25
24 to 32

Alloy Composition

Aluminum (Al), % 92.1 to 95.1
0
Carbon (C), % 0
0 to 0.14
Chromium (Cr), % 0
26 to 30
Cobalt (Co), % 0
58.9 to 69
Copper (Cu), % 4.0 to 5.2
0
Iron (Fe), % 0 to 0.15
0 to 0.75
Magnesium (Mg), % 0.15 to 0.55
0
Manganese (Mn), % 0.2 to 0.5
0 to 1.0
Molybdenum (Mo), % 0
5.0 to 7.0
Nickel (Ni), % 0
0 to 1.0
Nitrogen (N), % 0
0 to 0.25
Silicon (Si), % 0 to 0.1
0 to 1.0
Silver (Ag), % 0.4 to 1.0
0
Titanium (Ti), % 0.15 to 0.35
0
Residuals, % 0 to 0.1
0