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R30008 Cobalt vs. 8090 Aluminum

R30008 cobalt belongs to the cobalt alloys classification, while 8090 aluminum belongs to the aluminum alloys. There are 23 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 R30008 cobalt and the bottom bar is 8090 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
67
Elongation at Break, % 1.1 to 73
3.5 to 13
Fatigue Strength, MPa 320 to 530
91 to 140
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 83
25
Tensile Strength: Ultimate (UTS), MPa 950 to 1700
340 to 490
Tensile Strength: Yield (Proof), MPa 500 to 1080
210 to 420

Thermal Properties

Latent Heat of Fusion, J/g 320
400
Melting Completion (Liquidus), °C 1400
660
Melting Onset (Solidus), °C 1330
600
Specific Heat Capacity, J/kg-K 450
960
Thermal Expansion, µm/m-K 13
24

Otherwise Unclassified Properties

Base Metal Price, % relative 95
18
Density, g/cm3 8.4
2.7
Embodied Carbon, kg CO2/kg material 8.1
8.6
Embodied Energy, MJ/kg 110
170
Embodied Water, L/kg 400
1160

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 590 to 2720
340 to 1330
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
50
Strength to Weight: Axial, points 31 to 56
34 to 49
Strength to Weight: Bending, points 25 to 37
39 to 50
Thermal Shock Resistance, points 25 to 44
15 to 22

Alloy Composition

Aluminum (Al), % 0
93 to 98.4
Boron (B), % 0 to 0.0010
0
Carbon (C), % 0 to 0.15
0
Chromium (Cr), % 18.5 to 21.5
0 to 0.1
Cobalt (Co), % 39 to 42
0
Copper (Cu), % 0
1.0 to 1.6
Iron (Fe), % 7.6 to 20
0 to 0.3
Lithium (Li), % 0
2.2 to 2.7
Magnesium (Mg), % 0
0.6 to 1.3
Manganese (Mn), % 1.0 to 2.0
0 to 0.1
Molybdenum (Mo), % 6.5 to 7.5
0
Nickel (Ni), % 15 to 18
0
Phosphorus (P), % 0 to 0.015
0
Silicon (Si), % 0 to 1.2
0 to 0.2
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
0 to 0.1
Zinc (Zn), % 0
0 to 0.25
Zirconium (Zr), % 0
0.040 to 0.16
Residuals, % 0
0 to 0.15