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4104 Aluminum vs. R30605 Cobalt

4104 aluminum belongs to the aluminum alloys classification, while R30605 cobalt belongs to the cobalt alloys. There are 25 material properties with values for both materials. Properties with values for just one material (6, 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 R30605 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
210
Elongation at Break, % 2.4
34
Fatigue Strength, MPa 42
260 to 590
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
81
Tensile Strength: Ultimate (UTS), MPa 110
1130 to 1900
Tensile Strength: Yield (Proof), MPa 60
470 to 1600

Thermal Properties

Latent Heat of Fusion, J/g 540
290
Melting Completion (Liquidus), °C 600
1410
Melting Onset (Solidus), °C 560
1330
Specific Heat Capacity, J/kg-K 900
410
Thermal Conductivity, W/m-K 130
9.6
Thermal Expansion, µm/m-K 22
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 33
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 120
1.8

Otherwise Unclassified Properties

Density, g/cm3 2.6
9.6
Embodied Carbon, kg CO2/kg material 8.0
9.8
Embodied Energy, MJ/kg 150
140
Embodied Water, L/kg 1080
450

Common Calculations

Stiffness to Weight: Axial, points 15
12
Stiffness to Weight: Bending, points 54
21
Strength to Weight: Axial, points 12
33 to 55
Strength to Weight: Bending, points 20
25 to 36
Thermal Diffusivity, mm2/s 58
2.5
Thermal Shock Resistance, points 5.1
31 to 52

Alloy Composition

Aluminum (Al), % 85.8 to 90
0
Bismuth (Bi), % 0.020 to 0.2
0
Carbon (C), % 0
0.050 to 0.15
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 0
46.4 to 57
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 0 to 0.8
0 to 3.0
Magnesium (Mg), % 1.0 to 2.0
0
Manganese (Mn), % 0 to 0.1
1.0 to 2.0
Nickel (Ni), % 0
9.0 to 11
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 9.0 to 10.5
0 to 0.4
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 0
14 to 16
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.15
0