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 |