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Class 3 Tungsten vs. Ductile Cast Iron

Class 3 tungsten belongs to the otherwise unclassified metals classification, while ductile cast iron belongs to the iron alloys. There are 24 material properties with values for both materials. Properties with values for just one material (8, 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 class 3 tungsten and the bottom bar is ductile cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 270
170 to 180
Elongation at Break, % 3.4
2.1 to 20
Poisson's Ratio 0.28
0.28 to 0.31
Shear Modulus, GPa 100
64 to 70
Tensile Strength: Ultimate (UTS), MPa 830
460 to 920
Tensile Strength: Yield (Proof), MPa 580
310 to 670

Thermal Properties

Latent Heat of Fusion, J/g 170
270
Specific Heat Capacity, J/kg-K 120
490
Thermal Conductivity, W/m-K 30
31 to 36
Thermal Expansion, µm/m-K 4.5
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 15
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.5
8.8 to 9.4

Otherwise Unclassified Properties

Density, g/cm3 15
7.1 to 7.5
Embodied Carbon, kg CO2/kg material 23
1.5
Embodied Energy, MJ/kg 360
21
Embodied Water, L/kg 150
43

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 25
17 to 80
Resilience: Unit (Modulus of Resilience), kJ/m3 630
280 to 1330
Stiffness to Weight: Axial, points 9.6
12 to 14
Stiffness to Weight: Bending, points 14
24 to 26
Strength to Weight: Axial, points 15
17 to 35
Strength to Weight: Bending, points 13
18 to 29
Thermal Diffusivity, mm2/s 15
8.9 to 10
Thermal Shock Resistance, points 49
17 to 35

Alloy Composition

Carbon (C), % 0
3.0 to 3.5
Iron (Fe), % 0
93.7 to 95.5
Phosphorus (P), % 0
0 to 0.080
Silicon (Si), % 0
1.5 to 2.8
Tungsten (W), % 95
0
Residuals, % 5.0
0