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Class 4 Tungsten vs. EN 1.4325 Stainless Steel

Class 4 tungsten belongs to the otherwise unclassified metals classification, while EN 1.4325 stainless steel belongs to the iron alloys. There are 24 material properties with values for both materials. Properties with values for just one material (11, 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 1.4325 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 270
200
Elongation at Break, % 2.3
45
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 110
77
Tensile Strength: Ultimate (UTS), MPa 790
650
Tensile Strength: Yield (Proof), MPa 580
210

Thermal Properties

Latent Heat of Fusion, J/g 170
290
Specific Heat Capacity, J/kg-K 130
480
Thermal Conductivity, W/m-K 30
16
Thermal Expansion, µm/m-K 4.5
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 9.7
2.8

Otherwise Unclassified Properties

Density, g/cm3 16
7.8
Embodied Carbon, kg CO2/kg material 24
3.0
Embodied Energy, MJ/kg 360
42
Embodied Water, L/kg 150
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 16
230
Resilience: Unit (Modulus of Resilience), kJ/m3 620
110
Stiffness to Weight: Axial, points 9.6
14
Stiffness to Weight: Bending, points 14
25
Strength to Weight: Axial, points 14
23
Strength to Weight: Bending, points 12
21
Thermal Diffusivity, mm2/s 15
4.3
Thermal Shock Resistance, points 46
15

Alloy Composition

Carbon (C), % 0
0.030 to 0.15
Chromium (Cr), % 0
17 to 19
Iron (Fe), % 0
67.8 to 75
Manganese (Mn), % 0
0 to 2.0
Nickel (Ni), % 0
8.0 to 10
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 97
0
Residuals, % 3.0
0