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Class 4 Tungsten vs. EN 1.6771 Steel

Class 4 tungsten belongs to the otherwise unclassified metals classification, while EN 1.6771 steel belongs to the iron alloys. There are 24 material properties with values for both materials. Properties with values for just one material (9, 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 EN 1.6771 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 270
190
Elongation at Break, % 2.3
8.0 to 8.7
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 110
73
Tensile Strength: Ultimate (UTS), MPa 790
930 to 1180
Tensile Strength: Yield (Proof), MPa 580
740 to 1140

Thermal Properties

Latent Heat of Fusion, J/g 170
250
Specific Heat Capacity, J/kg-K 130
470
Thermal Conductivity, W/m-K 30
46
Thermal Expansion, µm/m-K 4.5
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
8.0
Electrical Conductivity: Equal Weight (Specific), % IACS 9.7
9.2

Otherwise Unclassified Properties

Density, g/cm3 16
7.9
Embodied Carbon, kg CO2/kg material 24
1.9
Embodied Energy, MJ/kg 360
25
Embodied Water, L/kg 150
58

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 16
75 to 93
Resilience: Unit (Modulus of Resilience), kJ/m3 620
1460 to 3450
Stiffness to Weight: Axial, points 9.6
13
Stiffness to Weight: Bending, points 14
24
Strength to Weight: Axial, points 14
33 to 41
Strength to Weight: Bending, points 12
27 to 31
Thermal Diffusivity, mm2/s 15
13
Thermal Shock Resistance, points 46
27 to 35

Alloy Composition

Carbon (C), % 0
0.27 to 0.33
Chromium (Cr), % 0
0.8 to 1.2
Iron (Fe), % 0
92.2 to 95
Manganese (Mn), % 0
0.6 to 1.0
Molybdenum (Mo), % 0
0.3 to 0.6
Nickel (Ni), % 0
3.0 to 4.0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
0 to 0.6
Sulfur (S), % 0
0 to 0.020
Tungsten (W), % 97
0
Residuals, % 3.0
0