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EN 1.7221 Steel vs. Class 1 Tungsten

EN 1.7221 steel belongs to the iron alloys classification, while class 1 tungsten belongs to the otherwise unclassified metals. There are 24 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is EN 1.7221 steel and the bottom bar is class 1 tungsten.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
250
Elongation at Break, % 11 to 17
5.7
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
98
Tensile Strength: Ultimate (UTS), MPa 650 to 780
860
Tensile Strength: Yield (Proof), MPa 430 to 630
580

Thermal Properties

Latent Heat of Fusion, J/g 250
160
Specific Heat Capacity, J/kg-K 470
120
Thermal Conductivity, W/m-K 44
21
Thermal Expansion, µm/m-K 13
5.1

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
12
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
7.4

Otherwise Unclassified Properties

Density, g/cm3 7.8
15
Embodied Carbon, kg CO2/kg material 1.5
22
Embodied Energy, MJ/kg 20
340
Embodied Water, L/kg 51
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 83 to 98
44
Resilience: Unit (Modulus of Resilience), kJ/m3 490 to 1050
660
Stiffness to Weight: Axial, points 13
9.6
Stiffness to Weight: Bending, points 24
14
Strength to Weight: Axial, points 23 to 27
16
Strength to Weight: Bending, points 21 to 24
14
Thermal Diffusivity, mm2/s 12
12
Thermal Shock Resistance, points 19 to 23
48

Alloy Composition

Carbon (C), % 0.22 to 0.29
0
Chromium (Cr), % 0.8 to 1.2
0
Iron (Fe), % 96.8 to 98.3
0
Manganese (Mn), % 0.5 to 0.8
0
Molybdenum (Mo), % 0.15 to 0.3
0
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0 to 0.6
0
Sulfur (S), % 0 to 0.030
0
Tungsten (W), % 0
90
Residuals, % 0
10