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3105 Aluminum vs. R30003 Cobalt

3105 aluminum belongs to the aluminum alloys classification, while R30003 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 3105 aluminum and the bottom bar is R30003 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
210
Elongation at Break, % 1.1 to 20
10 to 73
Fatigue Strength, MPa 39 to 95
320 to 560
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
83
Tensile Strength: Ultimate (UTS), MPa 120 to 240
970 to 1720
Tensile Strength: Yield (Proof), MPa 46 to 220
510 to 1090

Thermal Properties

Latent Heat of Fusion, J/g 400
310
Melting Completion (Liquidus), °C 660
1400
Melting Onset (Solidus), °C 640
1440
Specific Heat Capacity, J/kg-K 900
450
Thermal Conductivity, W/m-K 170
13
Thermal Expansion, µm/m-K 24
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 44
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 140
2.1

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
95
Density, g/cm3 2.8
8.4
Embodied Carbon, kg CO2/kg material 8.2
8.0
Embodied Energy, MJ/kg 150
110
Embodied Water, L/kg 1180
400

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 15 to 340
600 to 2790
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
24
Strength to Weight: Axial, points 12 to 24
32 to 57
Strength to Weight: Bending, points 20 to 31
26 to 38
Thermal Diffusivity, mm2/s 68
3.3
Thermal Shock Resistance, points 5.2 to 11
26 to 45

Alloy Composition

Aluminum (Al), % 96 to 99.5
0
Boron (B), % 0
0 to 0.1
Carbon (C), % 0
0 to 0.15
Chromium (Cr), % 0 to 0.2
19 to 21
Cobalt (Co), % 0
39 to 41
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 0 to 0.7
10 to 20.5
Magnesium (Mg), % 0.2 to 0.8
0
Manganese (Mn), % 0.3 to 0.8
1.5 to 2.5
Molybdenum (Mo), % 0
6.0 to 8.0
Nickel (Ni), % 0
14 to 16
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0 to 0.6
0 to 1.2
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.4
0
Residuals, % 0 to 0.15
0

Comparable Variants