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Class 3 Tungsten vs. R30155 Cobalt

Class 3 tungsten belongs to the otherwise unclassified metals classification, while R30155 cobalt belongs to the iron alloys. There are 22 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is class 3 tungsten and the bottom bar is R30155 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 270
210
Elongation at Break, % 3.4
34
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 100
81
Tensile Strength: Ultimate (UTS), MPa 830
850
Tensile Strength: Yield (Proof), MPa 580
390

Thermal Properties

Latent Heat of Fusion, J/g 170
300
Specific Heat Capacity, J/kg-K 120
450
Thermal Conductivity, W/m-K 30
12
Thermal Expansion, µm/m-K 4.5
14

Otherwise Unclassified Properties

Density, g/cm3 15
8.5
Embodied Carbon, kg CO2/kg material 23
9.7
Embodied Energy, MJ/kg 360
150
Embodied Water, L/kg 150
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 25
230
Resilience: Unit (Modulus of Resilience), kJ/m3 630
370
Stiffness to Weight: Axial, points 9.6
14
Stiffness to Weight: Bending, points 14
23
Strength to Weight: Axial, points 15
28
Strength to Weight: Bending, points 13
24
Thermal Diffusivity, mm2/s 15
3.2
Thermal Shock Resistance, points 49
21

Alloy Composition

Carbon (C), % 0
0.080 to 0.16
Chromium (Cr), % 0
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
Iron (Fe), % 0
24.3 to 36.2
Manganese (Mn), % 0
1.0 to 2.0
Molybdenum (Mo), % 0
2.5 to 3.5
Nickel (Ni), % 0
19 to 21
Niobium (Nb), % 0
0.75 to 1.3
Nitrogen (N), % 0
0 to 0.2
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tantalum (Ta), % 0
0.75 to 1.3
Tungsten (W), % 95
2.0 to 3.0
Residuals, % 5.0
0