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6061 Aluminum vs. AWS BCo-1

6061 aluminum belongs to the aluminum alloys classification, while AWS BCo-1 belongs to the cobalt 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 6061 aluminum and the bottom bar is AWS BCo-1.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
200
Poisson's Ratio 0.33
0.3
Shear Modulus, GPa 26
78
Tensile Strength: Ultimate (UTS), MPa 130 to 410
700

Thermal Properties

Latent Heat of Fusion, J/g 400
420
Melting Completion (Liquidus), °C 650
1150
Melting Onset (Solidus), °C 580
1120
Specific Heat Capacity, J/kg-K 900
480
Thermal Expansion, µm/m-K 24
12

Otherwise Unclassified Properties

Density, g/cm3 2.7
8.1
Embodied Carbon, kg CO2/kg material 8.3
8.0
Embodied Energy, MJ/kg 150
110
Embodied Water, L/kg 1180
430

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
24
Strength to Weight: Axial, points 13 to 42
24
Strength to Weight: Bending, points 21 to 45
22
Thermal Shock Resistance, points 5.7 to 18
21

Alloy Composition

Aluminum (Al), % 95.9 to 98.6
0 to 0.050
Boron (B), % 0
0.7 to 0.9
Carbon (C), % 0
0.35 to 0.45
Chromium (Cr), % 0.040 to 0.35
18 to 20
Cobalt (Co), % 0
46 to 54
Copper (Cu), % 0.15 to 0.4
0
Iron (Fe), % 0 to 0.7
0 to 1.0
Magnesium (Mg), % 0.8 to 1.2
0
Manganese (Mn), % 0 to 0.15
0
Nickel (Ni), % 0
16 to 18
Phosphorus (P), % 0
0 to 0.020
Selenium (Se), % 0
0 to 0.0050
Silicon (Si), % 0.4 to 0.8
7.5 to 8.5
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 0 to 0.15
0 to 0.050
Tungsten (W), % 0
3.5 to 4.5
Zinc (Zn), % 0 to 0.25
0
Zirconium (Zr), % 0
0 to 0.050
Residuals, % 0
0 to 0.5