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5383 Aluminum vs. R30021 Cobalt

5383 aluminum belongs to the aluminum alloys classification, while R30021 cobalt belongs to the cobalt alloys. There are 27 material properties with values for both materials. Properties with values for just one material (7, 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 5383 aluminum and the bottom bar is R30021 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
220
Elongation at Break, % 6.7 to 15
9.0
Fatigue Strength, MPa 130 to 200
250
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
86
Tensile Strength: Ultimate (UTS), MPa 310 to 370
700
Tensile Strength: Yield (Proof), MPa 150 to 310
500

Thermal Properties

Latent Heat of Fusion, J/g 390
330
Melting Completion (Liquidus), °C 650
1350
Melting Onset (Solidus), °C 540
1190
Specific Heat Capacity, J/kg-K 900
450
Thermal Conductivity, W/m-K 130
15
Thermal Expansion, µm/m-K 24
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 29
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 97
2.1

Otherwise Unclassified Properties

Density, g/cm3 2.7
8.4
Embodied Carbon, kg CO2/kg material 9.0
8.0
Embodied Energy, MJ/kg 160
110
Embodied Water, L/kg 1170
520

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 23 to 40
57
Resilience: Unit (Modulus of Resilience), kJ/m3 170 to 690
570
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 50
24
Strength to Weight: Axial, points 32 to 38
23
Strength to Weight: Bending, points 38 to 42
21
Thermal Diffusivity, mm2/s 51
3.8
Thermal Shock Resistance, points 14 to 16
21

Alloy Composition


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Aluminum (Al), % 92 to 95.3
0
Carbon (C), % 0
0.2 to 0.35
Chromium (Cr), % 0 to 0.25
26 to 29
Cobalt (Co), % 0
61.7 to 67.3
Copper (Cu), % 0 to 0.2
0
Iron (Fe), % 0 to 0.25
0 to 3.0
Magnesium (Mg), % 4.0 to 5.2
0
Manganese (Mn), % 0.7 to 1.0
0
Molybdenum (Mo), % 0
4.5 to 6.0
Nickel (Ni), % 0
2.0 to 3.0
Silicon (Si), % 0 to 0.25
0 to 1.5
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.4
0
Zirconium (Zr), % 0 to 0.2
0
Residuals, % 0 to 0.15
0