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R30021 Cobalt vs. 358.0 Aluminum

R30021 cobalt belongs to the cobalt alloys classification, while 358.0 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 R30021 cobalt and the bottom bar is 358.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
71
Elongation at Break, % 9.0
3.5 to 6.0
Fatigue Strength, MPa 250
100 to 110
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 86
27
Tensile Strength: Ultimate (UTS), MPa 700
350 to 370
Tensile Strength: Yield (Proof), MPa 500
290 to 320

Thermal Properties

Latent Heat of Fusion, J/g 330
520
Melting Completion (Liquidus), °C 1350
600
Melting Onset (Solidus), °C 1190
560
Specific Heat Capacity, J/kg-K 450
900
Thermal Conductivity, W/m-K 15
150
Thermal Expansion, µm/m-K 11
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
36
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
130

Otherwise Unclassified Properties

Density, g/cm3 8.4
2.6
Embodied Carbon, kg CO2/kg material 8.0
8.7
Embodied Energy, MJ/kg 110
160
Embodied Water, L/kg 520
1090

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 57
12 to 20
Resilience: Unit (Modulus of Resilience), kJ/m3 570
590 to 710
Stiffness to Weight: Axial, points 15
15
Stiffness to Weight: Bending, points 24
53
Strength to Weight: Axial, points 23
37 to 39
Strength to Weight: Bending, points 21
42 to 44
Thermal Diffusivity, mm2/s 3.8
63
Thermal Shock Resistance, points 21
16 to 17

Alloy Composition


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Aluminum (Al), % 0
89.1 to 91.8
Beryllium (Be), % 0
0.1 to 0.3
Carbon (C), % 0.2 to 0.35
0
Chromium (Cr), % 26 to 29
0 to 0.2
Cobalt (Co), % 61.7 to 67.3
0
Copper (Cu), % 0
0 to 0.2
Iron (Fe), % 0 to 3.0
0 to 0.3
Magnesium (Mg), % 0
0.4 to 0.6
Manganese (Mn), % 0
0 to 0.2
Molybdenum (Mo), % 4.5 to 6.0
0
Nickel (Ni), % 2.0 to 3.0
0
Silicon (Si), % 0 to 1.5
7.6 to 8.6
Titanium (Ti), % 0
0.1 to 0.2
Zinc (Zn), % 0
0 to 0.2
Residuals, % 0
0 to 0.15