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324.0 Aluminum vs. R30155 Cobalt

324.0 aluminum belongs to the aluminum alloys classification, while R30155 cobalt belongs to the iron 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 324.0 aluminum and the bottom bar is R30155 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
210
Elongation at Break, % 3.0 to 4.0
34
Fatigue Strength, MPa 77 to 89
310
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
81
Tensile Strength: Ultimate (UTS), MPa 210 to 310
850
Tensile Strength: Yield (Proof), MPa 110 to 270
390

Thermal Properties

Latent Heat of Fusion, J/g 500
300
Maximum Temperature: Mechanical, °C 170
1100
Melting Completion (Liquidus), °C 610
1470
Melting Onset (Solidus), °C 550
1420
Specific Heat Capacity, J/kg-K 900
450
Thermal Conductivity, W/m-K 150
12
Thermal Expansion, µm/m-K 21
14

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
80
Density, g/cm3 2.7
8.5
Embodied Carbon, kg CO2/kg material 7.9
9.7
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1090
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 6.8 to 8.9
230
Resilience: Unit (Modulus of Resilience), kJ/m3 85 to 510
370
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 52
23
Strength to Weight: Axial, points 22 to 32
28
Strength to Weight: Bending, points 29 to 38
24
Thermal Diffusivity, mm2/s 62
3.2
Thermal Shock Resistance, points 9.7 to 14
21

Alloy Composition

Aluminum (Al), % 87.3 to 92.2
0
Carbon (C), % 0
0.080 to 0.16
Chromium (Cr), % 0
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
Copper (Cu), % 0.4 to 0.6
0
Iron (Fe), % 0 to 1.2
24.3 to 36.2
Magnesium (Mg), % 0.4 to 0.7
0
Manganese (Mn), % 0 to 0.5
1.0 to 2.0
Molybdenum (Mo), % 0
2.5 to 3.5
Nickel (Ni), % 0 to 0.3
19 to 21
Niobium (Nb), % 0
0.75 to 1.3
Nitrogen (N), % 0
0 to 0.2
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 7.0 to 8.0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tantalum (Ta), % 0
0.75 to 1.3
Titanium (Ti), % 0 to 0.2
0
Tungsten (W), % 0
2.0 to 3.0
Zinc (Zn), % 0 to 1.0
0
Residuals, % 0 to 0.2
0