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242.0-O Aluminum vs. Annealed R30008 Cobalt

242.0-O aluminum belongs to the aluminum alloys classification, while annealed R30008 cobalt belongs to the cobalt alloys. There are 23 material properties with values for both materials. Properties with values for just one material (9, 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 242.0-O aluminum and the bottom bar is annealed R30008 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
210
Elongation at Break, % 1.0
73
Fatigue Strength, MPa 110
320
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
83
Tensile Strength: Ultimate (UTS), MPa 180
950
Tensile Strength: Yield (Proof), MPa 120
500

Thermal Properties

Latent Heat of Fusion, J/g 390
320
Melting Completion (Liquidus), °C 640
1400
Melting Onset (Solidus), °C 530
1330
Specific Heat Capacity, J/kg-K 870
450
Thermal Expansion, µm/m-K 22
13

Otherwise Unclassified Properties

Base Metal Price, % relative 12
95
Density, g/cm3 3.1
8.4
Embodied Carbon, kg CO2/kg material 8.3
8.1
Embodied Energy, MJ/kg 150
110
Embodied Water, L/kg 1130
400

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 110
590
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 45
24
Strength to Weight: Axial, points 16
31
Strength to Weight: Bending, points 23
25
Thermal Shock Resistance, points 8.0
25

Alloy Composition

Aluminum (Al), % 88.4 to 93.6
0
Boron (B), % 0
0 to 0.0010
Carbon (C), % 0
0 to 0.15
Chromium (Cr), % 0 to 0.25
18.5 to 21.5
Cobalt (Co), % 0
39 to 42
Copper (Cu), % 3.5 to 4.5
0
Iron (Fe), % 0 to 1.0
7.6 to 20
Magnesium (Mg), % 1.2 to 1.8
0
Manganese (Mn), % 0 to 0.35
1.0 to 2.0
Molybdenum (Mo), % 0
6.5 to 7.5
Nickel (Ni), % 1.7 to 2.3
15 to 18
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0 to 0.7
0 to 1.2
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0 to 0.25
0
Zinc (Zn), % 0 to 0.35
0
Residuals, % 0 to 0.15
0