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4104 Aluminum vs. R30816 Cobalt

4104 aluminum belongs to the aluminum alloys classification, while R30816 cobalt belongs to the cobalt alloys. There are 25 material properties with values for both materials. Properties with values for just one material (8, 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 4104 aluminum and the bottom bar is R30816 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
210
Elongation at Break, % 2.4
23
Fatigue Strength, MPa 42
250
Poisson's Ratio 0.33
0.3
Shear Modulus, GPa 27
81
Tensile Strength: Ultimate (UTS), MPa 110
1020
Tensile Strength: Yield (Proof), MPa 60
460

Thermal Properties

Latent Heat of Fusion, J/g 540
300
Melting Completion (Liquidus), °C 600
1540
Melting Onset (Solidus), °C 560
1460
Specific Heat Capacity, J/kg-K 900
420
Thermal Conductivity, W/m-K 130
13
Thermal Expansion, µm/m-K 22
12

Otherwise Unclassified Properties

Density, g/cm3 2.6
9.1
Embodied Carbon, kg CO2/kg material 8.0
20
Embodied Energy, MJ/kg 150
320
Embodied Water, L/kg 1080
440

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.3
190
Resilience: Unit (Modulus of Resilience), kJ/m3 25
510
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 54
22
Strength to Weight: Axial, points 12
31
Strength to Weight: Bending, points 20
25
Thermal Diffusivity, mm2/s 58
3.3
Thermal Shock Resistance, points 5.1
28

Alloy Composition

Aluminum (Al), % 85.8 to 90
0
Bismuth (Bi), % 0.020 to 0.2
0
Carbon (C), % 0
0.32 to 0.42
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 0
40 to 49.8
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 0 to 0.8
0 to 5.0
Magnesium (Mg), % 1.0 to 2.0
0
Manganese (Mn), % 0 to 0.1
1.0 to 2.0
Molybdenum (Mo), % 0
3.5 to 4.5
Nickel (Ni), % 0
19 to 21
Niobium (Nb), % 0
3.5 to 4.5
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 9.0 to 10.5
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tantalum (Ta), % 0
3.5 to 4.5
Tungsten (W), % 0
3.5 to 4.5
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.15
0