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R31537 Cobalt vs. 444.0 Aluminum

R31537 cobalt belongs to the cobalt alloys classification, while 444.0 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 444.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
71
Elongation at Break, % 14 to 23
25
Fatigue Strength, MPa 310 to 480
51
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 87
27
Tensile Strength: Ultimate (UTS), MPa 1000 to 1340
190
Tensile Strength: Yield (Proof), MPa 590 to 940
83

Thermal Properties

Latent Heat of Fusion, J/g 320
500
Melting Completion (Liquidus), °C 1360
610
Melting Onset (Solidus), °C 1290
600
Specific Heat Capacity, J/kg-K 450
900
Thermal Conductivity, W/m-K 13
160
Thermal Expansion, µm/m-K 13
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
40
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
140

Otherwise Unclassified Properties

Density, g/cm3 8.4
2.6
Embodied Carbon, kg CO2/kg material 8.1
7.9
Embodied Energy, MJ/kg 110
150
Embodied Water, L/kg 530
1110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 200
39
Resilience: Unit (Modulus of Resilience), kJ/m3 780 to 1990
49
Stiffness to Weight: Axial, points 15
15
Stiffness to Weight: Bending, points 24
53
Strength to Weight: Axial, points 33 to 44
20
Strength to Weight: Bending, points 26 to 32
28
Thermal Diffusivity, mm2/s 3.4
67
Thermal Shock Resistance, points 24 to 32
8.8

Alloy Composition

Aluminum (Al), % 0
90.5 to 93.5
Carbon (C), % 0 to 0.14
0
Chromium (Cr), % 26 to 30
0
Cobalt (Co), % 58.9 to 69
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 0 to 0.75
0 to 0.6
Magnesium (Mg), % 0
0 to 0.1
Manganese (Mn), % 0 to 1.0
0 to 0.35
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
6.5 to 7.5
Titanium (Ti), % 0
0 to 0.25
Zinc (Zn), % 0
0 to 0.35
Residuals, % 0
0 to 0.15