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Class 3 Tungsten vs. AWS BCo-1

Class 3 tungsten belongs to the otherwise unclassified metals classification, while AWS BCo-1 belongs to the cobalt alloys. There are 16 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is class 3 tungsten and the bottom bar is AWS BCo-1.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 270
200
Poisson's Ratio 0.28
0.3
Shear Modulus, GPa 100
78
Tensile Strength: Ultimate (UTS), MPa 830
700

Thermal Properties

Latent Heat of Fusion, J/g 170
420
Specific Heat Capacity, J/kg-K 120
480
Thermal Expansion, µm/m-K 4.5
12

Otherwise Unclassified Properties

Density, g/cm3 15
8.1
Embodied Carbon, kg CO2/kg material 23
8.0
Embodied Energy, MJ/kg 360
110
Embodied Water, L/kg 150
430

Common Calculations

Stiffness to Weight: Axial, points 9.6
14
Stiffness to Weight: Bending, points 14
24
Strength to Weight: Axial, points 15
24
Strength to Weight: Bending, points 13
22
Thermal Shock Resistance, points 49
21

Alloy Composition

Aluminum (Al), % 0
0 to 0.050
Boron (B), % 0
0.7 to 0.9
Carbon (C), % 0
0.35 to 0.45
Chromium (Cr), % 0
18 to 20
Cobalt (Co), % 0
46 to 54
Iron (Fe), % 0
0 to 1.0
Nickel (Ni), % 0
16 to 18
Phosphorus (P), % 0
0 to 0.020
Selenium (Se), % 0
0 to 0.0050
Silicon (Si), % 0
7.5 to 8.5
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 0
0 to 0.050
Tungsten (W), % 95
3.5 to 4.5
Zirconium (Zr), % 0
0 to 0.050
Residuals, % 0
0 to 0.5