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7129 Aluminum vs. R30006 Cobalt

7129 Aluminum belongs to the aluminum alloys classification, while R30006 cobalt belongs to the cobalt alloys. There are 27 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 7129 Aluminum and the bottom bar is R30006 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
220
Elongation at Break, % 9.0 to 9.1
1.0
Fatigue Strength, MPa 150 to 190
260
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
85
Tensile Strength: Ultimate (UTS), MPa 430
900
Tensile Strength: Yield (Proof), MPa 380 to 390
540

Thermal Properties

Latent Heat of Fusion, J/g 380
320
Melting Completion (Liquidus), °C 630
1400
Melting Onset (Solidus), °C 510
1290
Specific Heat Capacity, J/kg-K 880
450
Thermal Conductivity, W/m-K 150
15
Thermal Expansion, µm/m-K 24
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
1.6
Electrical Conductivity: Equal Weight (Specific), % IACS 120
1.7

Otherwise Unclassified Properties

Density, g/cm3 2.9
8.6
Embodied Carbon, kg CO2/kg material 8.3
7.8
Embodied Energy, MJ/kg 150
110
Embodied Water, L/kg 1150
500

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 37 to 38
7.8
Resilience: Unit (Modulus of Resilience), kJ/m3 1050 to 1090
670
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
23
Strength to Weight: Axial, points 41
29
Strength to Weight: Bending, points 43 to 44
24
Thermal Diffusivity, mm2/s 58
3.9
Thermal Shock Resistance, points 19
26

Alloy Composition

Aluminum (Al), % 91 to 94
0
Carbon (C), % 0
0.9 to 1.4
Chromium (Cr), % 0 to 0.1
27 to 32
Cobalt (Co), % 0
48.6 to 68.1
Copper (Cu), % 0.5 to 0.9
0
Gallium (Ga), % 0 to 0.030
0
Iron (Fe), % 0 to 0.3
0 to 3.0
Magnesium (Mg), % 1.3 to 2.0
0
Manganese (Mn), % 0 to 0.1
0
Molybdenum (Mo), % 0
0 to 1.0
Nickel (Ni), % 0
0 to 3.0
Silicon (Si), % 0 to 0.15
0 to 2.0
Titanium (Ti), % 0 to 0.050
0
Tungsten (W), % 0
4.0 to 6.0
Vanadium (V), % 0 to 0.050
0
Zinc (Zn), % 4.2 to 5.2
0
Residuals, % 0 to 0.15
0