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R30008 Cobalt vs. EN AC-43500 Aluminum

R30008 cobalt belongs to the cobalt alloys classification, while EN AC-43500 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-43500 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
72
Elongation at Break, % 1.1 to 73
4.5 to 13
Fatigue Strength, MPa 320 to 530
62 to 100
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 83
27
Tensile Strength: Ultimate (UTS), MPa 950 to 1700
220 to 300
Tensile Strength: Yield (Proof), MPa 500 to 1080
140 to 170

Thermal Properties

Latent Heat of Fusion, J/g 320
550
Melting Completion (Liquidus), °C 1400
600
Melting Onset (Solidus), °C 1330
590
Specific Heat Capacity, J/kg-K 450
900
Thermal Expansion, µm/m-K 13
22

Otherwise Unclassified Properties

Base Metal Price, % relative 95
9.5
Density, g/cm3 8.4
2.6
Embodied Carbon, kg CO2/kg material 8.1
7.8
Embodied Energy, MJ/kg 110
150
Embodied Water, L/kg 400
1070

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 590 to 2720
130 to 200
Stiffness to Weight: Axial, points 14
16
Stiffness to Weight: Bending, points 24
54
Strength to Weight: Axial, points 31 to 56
24 to 33
Strength to Weight: Bending, points 25 to 37
32 to 39
Thermal Shock Resistance, points 25 to 44
10 to 14

Alloy Composition

Aluminum (Al), % 0
86.4 to 90.5
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 0.25
Magnesium (Mg), % 0
0.1 to 0.6
Manganese (Mn), % 1.0 to 2.0
0.4 to 0.8
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
9.0 to 11.5
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0
0 to 0.070
Residuals, % 0
0 to 0.15