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R31537 Cobalt vs. 2219 Aluminum

R31537 cobalt belongs to the cobalt alloys classification, while 2219 aluminum belongs to the aluminum alloys. There are 27 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 R31537 cobalt and the bottom bar is 2219 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
72
Elongation at Break, % 14 to 23
2.2 to 20
Fatigue Strength, MPa 310 to 480
90 to 130
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 87
27
Tensile Strength: Ultimate (UTS), MPa 1000 to 1340
180 to 480
Tensile Strength: Yield (Proof), MPa 590 to 940
88 to 390

Thermal Properties

Latent Heat of Fusion, J/g 320
390
Melting Completion (Liquidus), °C 1360
640
Melting Onset (Solidus), °C 1290
540
Specific Heat Capacity, J/kg-K 450
870
Thermal Conductivity, W/m-K 13
110 to 170
Thermal Expansion, µm/m-K 13
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
28 to 44
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
81 to 130

Otherwise Unclassified Properties

Density, g/cm3 8.4
3.1
Embodied Carbon, kg CO2/kg material 8.1
8.2
Embodied Energy, MJ/kg 110
150
Embodied Water, L/kg 530
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 200
9.6 to 60
Resilience: Unit (Modulus of Resilience), kJ/m3 780 to 1990
54 to 1060
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 24
44
Strength to Weight: Axial, points 33 to 44
16 to 43
Strength to Weight: Bending, points 26 to 32
23 to 44
Thermal Diffusivity, mm2/s 3.4
42 to 63
Thermal Shock Resistance, points 24 to 32
8.2 to 22

Alloy Composition

Aluminum (Al), % 0
91.5 to 93.8
Carbon (C), % 0 to 0.14
0
Chromium (Cr), % 26 to 30
0
Cobalt (Co), % 58.9 to 69
0
Copper (Cu), % 0
5.8 to 6.8
Iron (Fe), % 0 to 0.75
0 to 0.3
Magnesium (Mg), % 0
0 to 0.020
Manganese (Mn), % 0 to 1.0
0.2 to 0.4
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 1.0
0
Nitrogen (N), % 0 to 0.25
0
Silicon (Si), % 0 to 1.0
0 to 0.2
Titanium (Ti), % 0
0.020 to 0.1
Vanadium (V), % 0
0.050 to 0.15
Zinc (Zn), % 0
0 to 0.1
Zirconium (Zr), % 0
0.1 to 0.25
Residuals, % 0
0 to 0.15

Comparable Variants