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R30008 Cobalt vs. 4006 Aluminum

R30008 cobalt belongs to the cobalt alloys classification, while 4006 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 4006 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
69
Elongation at Break, % 1.1 to 73
3.4 to 24
Fatigue Strength, MPa 320 to 530
35 to 110
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 83
26
Tensile Strength: Ultimate (UTS), MPa 950 to 1700
110 to 160
Tensile Strength: Yield (Proof), MPa 500 to 1080
62 to 140

Thermal Properties

Latent Heat of Fusion, J/g 320
410
Melting Completion (Liquidus), °C 1400
640
Melting Onset (Solidus), °C 1330
620
Specific Heat Capacity, J/kg-K 450
900
Thermal Expansion, µm/m-K 13
23

Otherwise Unclassified Properties

Base Metal Price, % relative 95
9.0
Density, g/cm3 8.4
2.7
Embodied Carbon, kg CO2/kg material 8.1
8.1
Embodied Energy, MJ/kg 110
150
Embodied Water, L/kg 400
1180

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 590 to 2720
28 to 130
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
50
Strength to Weight: Axial, points 31 to 56
11 to 16
Strength to Weight: Bending, points 25 to 37
19 to 24
Thermal Shock Resistance, points 25 to 44
4.9 to 7.0

Alloy Composition

Aluminum (Al), % 0
97.4 to 98.7
Boron (B), % 0 to 0.0010
0
Carbon (C), % 0 to 0.15
0
Chromium (Cr), % 18.5 to 21.5
0 to 0.2
Cobalt (Co), % 39 to 42
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 7.6 to 20
0.5 to 0.8
Magnesium (Mg), % 0
0 to 0.010
Manganese (Mn), % 1.0 to 2.0
0 to 0.050
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
0.8 to 1.2
Sulfur (S), % 0 to 0.015
0
Zinc (Zn), % 0
0 to 0.050
Residuals, % 0
0 to 0.15

Comparable Variants