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358.0 Aluminum vs. R30021 Cobalt

358.0 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 (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 358.0 aluminum and the bottom bar is R30021 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition


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