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7204 Aluminum vs. R30006 Cobalt

7204 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 7204 aluminum and the bottom bar is R30006 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
220
Elongation at Break, % 11 to 13
1.0
Fatigue Strength, MPa 110 to 130
260
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
85
Tensile Strength: Ultimate (UTS), MPa 220 to 380
900
Tensile Strength: Yield (Proof), MPa 120 to 310
540

Thermal Properties

Latent Heat of Fusion, J/g 380
320
Melting Completion (Liquidus), °C 640
1400
Melting Onset (Solidus), °C 520
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 39
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 8.4
7.8
Embodied Energy, MJ/kg 150
110
Embodied Water, L/kg 1140
500

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 25 to 40
7.8
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 710
670
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
23
Strength to Weight: Axial, points 21 to 36
29
Strength to Weight: Bending, points 28 to 40
24
Thermal Diffusivity, mm2/s 58
3.9
Thermal Shock Resistance, points 9.4 to 16
26

Alloy Composition

Aluminum (Al), % 90.5 to 94.8
0
Carbon (C), % 0
0.9 to 1.4
Chromium (Cr), % 0 to 0.3
27 to 32
Cobalt (Co), % 0
48.6 to 68.1
Copper (Cu), % 0 to 0.2
0
Iron (Fe), % 0 to 0.35
0 to 3.0
Magnesium (Mg), % 1.0 to 2.0
0
Manganese (Mn), % 0.2 to 0.7
0
Molybdenum (Mo), % 0
0 to 1.0
Nickel (Ni), % 0
0 to 3.0
Silicon (Si), % 0 to 0.3
0 to 2.0
Titanium (Ti), % 0 to 0.2
0
Tungsten (W), % 0
4.0 to 6.0
Vanadium (V), % 0 to 0.1
0
Zinc (Zn), % 4.0 to 5.0
0
Zirconium (Zr), % 0 to 0.25
0
Residuals, % 0 to 0.15
0