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Class 1 Tungsten vs. R30006 Cobalt

Class 1 tungsten belongs to the otherwise unclassified metals classification, while R30006 cobalt belongs to the cobalt alloys. There are 25 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is class 1 tungsten and the bottom bar is R30006 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 250
220
Elongation at Break, % 5.7
1.0
Poisson's Ratio 0.29
0.28
Rockwell C Hardness 28
40
Shear Modulus, GPa 98
85
Tensile Strength: Ultimate (UTS), MPa 860
900
Tensile Strength: Yield (Proof), MPa 580
540

Thermal Properties

Latent Heat of Fusion, J/g 160
320
Specific Heat Capacity, J/kg-K 120
450
Thermal Conductivity, W/m-K 21
15
Thermal Expansion, µm/m-K 5.1
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 12
1.6
Electrical Conductivity: Equal Weight (Specific), % IACS 7.4
1.7

Otherwise Unclassified Properties

Density, g/cm3 15
8.6
Embodied Carbon, kg CO2/kg material 22
7.8
Embodied Energy, MJ/kg 340
110
Embodied Water, L/kg 140
500

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 44
7.8
Resilience: Unit (Modulus of Resilience), kJ/m3 660
670
Stiffness to Weight: Axial, points 9.6
14
Stiffness to Weight: Bending, points 14
23
Strength to Weight: Axial, points 16
29
Strength to Weight: Bending, points 14
24
Thermal Diffusivity, mm2/s 12
3.9
Thermal Shock Resistance, points 48
26

Alloy Composition

Carbon (C), % 0
0.9 to 1.4
Chromium (Cr), % 0
27 to 32
Cobalt (Co), % 0
48.6 to 68.1
Iron (Fe), % 0
0 to 3.0
Molybdenum (Mo), % 0
0 to 1.0
Nickel (Ni), % 0
0 to 3.0
Silicon (Si), % 0
0 to 2.0
Tungsten (W), % 90
4.0 to 6.0
Residuals, % 10
0