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7005 Aluminum vs. R30016 Cobalt

7005 aluminum belongs to the aluminum alloys classification, while R30016 cobalt belongs to the cobalt alloys. There are 27 material properties with values for both materials. Properties with values for just one material (9, 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 7005 aluminum and the bottom bar is R30016 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
220
Elongation at Break, % 10 to 20
8.4
Fatigue Strength, MPa 100 to 190
290
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
85
Tensile Strength: Ultimate (UTS), MPa 200 to 400
1010
Tensile Strength: Yield (Proof), MPa 95 to 350
580

Thermal Properties

Latent Heat of Fusion, J/g 380
320
Melting Completion (Liquidus), °C 640
1360
Melting Onset (Solidus), °C 610
1270
Specific Heat Capacity, J/kg-K 880
450
Thermal Conductivity, W/m-K 140 to 170
15
Thermal Expansion, µm/m-K 23
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 35 to 43
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 110 to 130
2.0

Otherwise Unclassified Properties

Density, g/cm3 2.9
8.5
Embodied Carbon, kg CO2/kg material 8.3
7.7
Embodied Energy, MJ/kg 150
110
Embodied Water, L/kg 1150
500

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 32 to 57
72
Resilience: Unit (Modulus of Resilience), kJ/m3 65 to 850
770
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
24
Strength to Weight: Axial, points 19 to 38
33
Strength to Weight: Bending, points 26 to 41
26
Thermal Diffusivity, mm2/s 54 to 65
3.9
Thermal Shock Resistance, points 8.7 to 18
24

Alloy Composition

Aluminum (Al), % 91 to 94.7
0
Carbon (C), % 0
0.9 to 1.4
Chromium (Cr), % 0.060 to 0.2
28 to 32
Cobalt (Co), % 0
49.6 to 66.9
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0 to 0.4
0 to 3.0
Magnesium (Mg), % 1.0 to 1.8
0
Manganese (Mn), % 0.2 to 0.7
0.5 to 2.0
Molybdenum (Mo), % 0
0 to 1.5
Nickel (Ni), % 0
0 to 3.0
Silicon (Si), % 0 to 0.35
0.2 to 2.0
Titanium (Ti), % 0.010 to 0.060
0
Tungsten (W), % 0
3.5 to 5.5
Zinc (Zn), % 4.0 to 5.0
0
Zirconium (Zr), % 0.080 to 0.2
0
Residuals, % 0 to 0.15
0