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R30008 Cobalt vs. 5657 Aluminum

R30008 cobalt belongs to the cobalt alloys classification, while 5657 aluminum belongs to the aluminum alloys. There are 23 material properties with values for both materials. Properties with values for just one material (8, 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 5657 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
68
Elongation at Break, % 1.1 to 73
6.6 to 15
Fatigue Strength, MPa 320 to 530
74 to 88
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 83
26
Tensile Strength: Ultimate (UTS), MPa 950 to 1700
150 to 200
Tensile Strength: Yield (Proof), MPa 500 to 1080
140 to 170

Thermal Properties

Latent Heat of Fusion, J/g 320
400
Melting Completion (Liquidus), °C 1400
660
Melting Onset (Solidus), °C 1330
640
Specific Heat Capacity, J/kg-K 450
900
Thermal Expansion, µm/m-K 13
24

Otherwise Unclassified Properties

Base Metal Price, % relative 95
9.5
Density, g/cm3 8.4
2.7
Embodied Carbon, kg CO2/kg material 8.1
8.4
Embodied Energy, MJ/kg 110
160
Embodied Water, L/kg 400
1200

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 590 to 2720
140 to 200
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
50
Strength to Weight: Axial, points 31 to 56
15 to 20
Strength to Weight: Bending, points 25 to 37
23 to 28
Thermal Shock Resistance, points 25 to 44
6.7 to 8.6

Alloy Composition

Aluminum (Al), % 0
98.5 to 99.4
Boron (B), % 0 to 0.0010
0
Carbon (C), % 0 to 0.15
0
Chromium (Cr), % 18.5 to 21.5
0
Cobalt (Co), % 39 to 42
0
Copper (Cu), % 0
0 to 0.1
Gallium (Ga), % 0
0 to 0.030
Iron (Fe), % 7.6 to 20
0 to 0.1
Magnesium (Mg), % 0
0.6 to 1.0
Manganese (Mn), % 1.0 to 2.0
0 to 0.030
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 0.080
Sulfur (S), % 0 to 0.015
0
Vanadium (V), % 0
0 to 0.050
Zinc (Zn), % 0
0 to 0.050
Residuals, % 0
0 to 0.050