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Class 4 Tungsten vs. ASTM Grade LC9 Steel

Class 4 tungsten belongs to the otherwise unclassified metals classification, while ASTM grade LC9 steel belongs to the iron alloys. There are 22 material properties with values for both materials. Properties with values for just one material (10, 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 4 tungsten and the bottom bar is ASTM grade LC9 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 270
190
Elongation at Break, % 2.3
22
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 110
73
Tensile Strength: Ultimate (UTS), MPa 790
660
Tensile Strength: Yield (Proof), MPa 580
590

Thermal Properties

Latent Heat of Fusion, J/g 170
260
Specific Heat Capacity, J/kg-K 130
470
Thermal Expansion, µm/m-K 4.5
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
8.9
Electrical Conductivity: Equal Weight (Specific), % IACS 9.7
10

Otherwise Unclassified Properties

Density, g/cm3 16
7.9
Embodied Carbon, kg CO2/kg material 24
2.3
Embodied Energy, MJ/kg 360
31
Embodied Water, L/kg 150
65

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 16
140
Resilience: Unit (Modulus of Resilience), kJ/m3 620
920
Stiffness to Weight: Axial, points 9.6
13
Stiffness to Weight: Bending, points 14
24
Strength to Weight: Axial, points 14
23
Strength to Weight: Bending, points 12
21
Thermal Shock Resistance, points 46
20

Alloy Composition

Carbon (C), % 0
0 to 0.13
Chromium (Cr), % 0
0 to 0.5
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 0
87.4 to 91.5
Manganese (Mn), % 0
0 to 0.9
Molybdenum (Mo), % 0
0 to 0.2
Nickel (Ni), % 0
8.5 to 10
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 0.45
Sulfur (S), % 0
0 to 0.045
Tungsten (W), % 97
0
Vanadium (V), % 0
0 to 0.030
Residuals, % 3.0
0