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204.0 Aluminum vs. R30008 Cobalt

204.0 aluminum belongs to the aluminum alloys classification, while R30008 cobalt belongs to the cobalt 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 204.0 aluminum and the bottom bar is R30008 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
210
Elongation at Break, % 5.7 to 7.8
1.1 to 73
Fatigue Strength, MPa 63 to 77
320 to 530
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
83
Tensile Strength: Ultimate (UTS), MPa 230 to 340
950 to 1700
Tensile Strength: Yield (Proof), MPa 180 to 220
500 to 1080

Thermal Properties

Latent Heat of Fusion, J/g 390
320
Melting Completion (Liquidus), °C 650
1400
Melting Onset (Solidus), °C 580
1330
Specific Heat Capacity, J/kg-K 880
450
Thermal Expansion, µm/m-K 19
13

Otherwise Unclassified Properties

Base Metal Price, % relative 11
95
Density, g/cm3 3.0
8.4
Embodied Carbon, kg CO2/kg material 8.0
8.1
Embodied Energy, MJ/kg 150
110
Embodied Water, L/kg 1150
400

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 220 to 350
590 to 2720
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
24
Strength to Weight: Axial, points 21 to 31
31 to 56
Strength to Weight: Bending, points 28 to 36
25 to 37
Thermal Shock Resistance, points 12 to 18
25 to 44

Alloy Composition

Aluminum (Al), % 93.4 to 95.5
0
Boron (B), % 0
0 to 0.0010
Carbon (C), % 0
0 to 0.15
Chromium (Cr), % 0
18.5 to 21.5
Cobalt (Co), % 0
39 to 42
Copper (Cu), % 4.2 to 5.0
0
Iron (Fe), % 0 to 0.35
7.6 to 20
Magnesium (Mg), % 0.15 to 0.35
0
Manganese (Mn), % 0 to 0.1
1.0 to 2.0
Molybdenum (Mo), % 0
6.5 to 7.5
Nickel (Ni), % 0 to 0.050
15 to 18
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0 to 0.2
0 to 1.2
Sulfur (S), % 0
0 to 0.015
Tin (Sn), % 0 to 0.050
0
Titanium (Ti), % 0.15 to 0.3
0
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.15
0