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AWS BCo-1 vs. 5021 Aluminum

AWS BCo-1 belongs to the cobalt alloys classification, while 5021 aluminum belongs to the aluminum alloys. There are 18 material properties with values for both materials. Properties with values for just one material (13, 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 AWS BCo-1 and the bottom bar is 5021 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
68
Poisson's Ratio 0.3
0.33
Shear Modulus, GPa 78
26
Tensile Strength: Ultimate (UTS), MPa 700
300 to 310

Thermal Properties

Latent Heat of Fusion, J/g 420
400
Melting Completion (Liquidus), °C 1150
640
Melting Onset (Solidus), °C 1120
590
Specific Heat Capacity, J/kg-K 480
900
Thermal Expansion, µm/m-K 12
23

Otherwise Unclassified Properties

Density, g/cm3 8.1
2.7
Embodied Carbon, kg CO2/kg material 8.0
8.6
Embodied Energy, MJ/kg 110
150
Embodied Water, L/kg 430
1180

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
50
Strength to Weight: Axial, points 24
30 to 32
Strength to Weight: Bending, points 22
37
Thermal Shock Resistance, points 21
13 to 14

Alloy Composition

Aluminum (Al), % 0 to 0.050
95.2 to 97.7
Boron (B), % 0.7 to 0.9
0
Carbon (C), % 0.35 to 0.45
0
Chromium (Cr), % 18 to 20
0 to 0.15
Cobalt (Co), % 46 to 54
0
Copper (Cu), % 0
0 to 0.15
Iron (Fe), % 0 to 1.0
0 to 0.5
Magnesium (Mg), % 0
2.2 to 2.8
Manganese (Mn), % 0
0.1 to 0.5
Nickel (Ni), % 16 to 18
0
Phosphorus (P), % 0 to 0.020
0
Selenium (Se), % 0 to 0.0050
0
Silicon (Si), % 7.5 to 8.5
0 to 0.4
Sulfur (S), % 0 to 0.020
0
Titanium (Ti), % 0 to 0.050
0
Tungsten (W), % 3.5 to 4.5
0
Zinc (Zn), % 0
0 to 0.15
Zirconium (Zr), % 0 to 0.050
0
Residuals, % 0
0 to 0.15