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R30008 Cobalt vs. EN AC-51100 Aluminum

R30008 cobalt belongs to the cobalt alloys classification, while EN AC-51100 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 EN AC-51100 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
68
Elongation at Break, % 1.1 to 73
4.5
Fatigue Strength, MPa 320 to 530
58
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 83
26
Tensile Strength: Ultimate (UTS), MPa 950 to 1700
160
Tensile Strength: Yield (Proof), MPa 500 to 1080
80

Thermal Properties

Latent Heat of Fusion, J/g 320
400
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
9.5
Density, g/cm3 8.4
2.7
Embodied Carbon, kg CO2/kg material 8.1
8.7
Embodied Energy, MJ/kg 110
150
Embodied Water, L/kg 400
1180

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 590 to 2720
47
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
51
Strength to Weight: Axial, points 31 to 56
17
Strength to Weight: Bending, points 25 to 37
25
Thermal Shock Resistance, points 25 to 44
7.3

Alloy Composition

Aluminum (Al), % 0
94.5 to 97.5
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 0.050
Iron (Fe), % 7.6 to 20
0 to 0.55
Magnesium (Mg), % 0
2.5 to 3.5
Manganese (Mn), % 1.0 to 2.0
0 to 0.45
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 0.55
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.15