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3105 Aluminum vs. R30605 Cobalt

3105 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 (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 3105 aluminum and the bottom bar is R30605 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
210
Elongation at Break, % 1.1 to 20
34
Fatigue Strength, MPa 39 to 95
260 to 590
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
81
Tensile Strength: Ultimate (UTS), MPa 120 to 240
1130 to 1900
Tensile Strength: Yield (Proof), MPa 46 to 220
470 to 1600

Thermal Properties

Latent Heat of Fusion, J/g 400
290
Melting Completion (Liquidus), °C 660
1410
Melting Onset (Solidus), °C 640
1330
Specific Heat Capacity, J/kg-K 900
410
Thermal Conductivity, W/m-K 170
9.6
Thermal Expansion, µm/m-K 24
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 44
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 140
1.8

Otherwise Unclassified Properties

Density, g/cm3 2.8
9.6
Embodied Carbon, kg CO2/kg material 8.2
9.8
Embodied Energy, MJ/kg 150
140
Embodied Water, L/kg 1180
450

Common Calculations

Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 50
21
Strength to Weight: Axial, points 12 to 24
33 to 55
Strength to Weight: Bending, points 20 to 31
25 to 36
Thermal Diffusivity, mm2/s 68
2.5
Thermal Shock Resistance, points 5.2 to 11
31 to 52

Alloy Composition

Aluminum (Al), % 96 to 99.5
0
Carbon (C), % 0
0.050 to 0.15
Chromium (Cr), % 0 to 0.2
19 to 21
Cobalt (Co), % 0
46.4 to 57
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 0 to 0.7
0 to 3.0
Magnesium (Mg), % 0.2 to 0.8
0
Manganese (Mn), % 0.3 to 0.8
1.0 to 2.0
Nickel (Ni), % 0
9.0 to 11
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.6
0 to 0.4
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.1
0
Tungsten (W), % 0
14 to 16
Zinc (Zn), % 0 to 0.4
0
Residuals, % 0 to 0.15
0

Comparable Variants