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AWS BCo-1 vs. 4115 Aluminum

AWS BCo-1 belongs to the cobalt alloys classification, while 4115 aluminum belongs to the aluminum alloys. There are 18 material properties with values for both materials. Properties with values for just one material (14, 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 4115 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
70
Poisson's Ratio 0.3
0.33
Shear Modulus, GPa 78
26
Tensile Strength: Ultimate (UTS), MPa 700
120 to 220

Thermal Properties

Latent Heat of Fusion, J/g 420
420
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
8.1
Embodied Energy, MJ/kg 110
150
Embodied Water, L/kg 430
1160

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
50
Strength to Weight: Axial, points 24
12 to 23
Strength to Weight: Bending, points 22
20 to 30
Thermal Shock Resistance, points 21
5.2 to 9.9

Alloy Composition

Aluminum (Al), % 0 to 0.050
94.6 to 97.4
Boron (B), % 0.7 to 0.9
0
Carbon (C), % 0.35 to 0.45
0
Chromium (Cr), % 18 to 20
0
Cobalt (Co), % 46 to 54
0
Copper (Cu), % 0
0.1 to 0.5
Iron (Fe), % 0 to 1.0
0 to 0.7
Magnesium (Mg), % 0
0.1 to 0.5
Manganese (Mn), % 0
0.6 to 1.2
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
1.8 to 2.2
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 0.2
Zirconium (Zr), % 0 to 0.050
0
Residuals, % 0
0 to 0.15