Grade 18 Titanium vs. EN 1.7711 Steel
Grade 18 titanium belongs to the titanium alloys classification, while EN 1.7711 steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is grade 18 titanium and the bottom bar is EN 1.7711 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 190 |
| Elongation at Break, % | 11 to 17 | |
| 16 to 22 |
| Fatigue Strength, MPa | 330 to 480 | |
| 290 to 520 |
| Poisson's Ratio | 0.32 | |
| 0.29 |
| Shear Modulus, GPa | 40 | |
| 73 |
| Shear Strength, MPa | 420 to 590 | |
| 440 to 570 |
| Tensile Strength: Ultimate (UTS), MPa | 690 to 980 | |
| 690 to 930 |
| Tensile Strength: Yield (Proof), MPa | 540 to 810 | |
| 400 to 800 |
Thermal Properties
| Latent Heat of Fusion, J/g | 410 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 330 | |
| 430 |
| Melting Completion (Liquidus), °C | 1640 | |
| 1460 |
| Melting Onset (Solidus), °C | 1590 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 550 | |
| 470 |
| Thermal Conductivity, W/m-K | 8.3 | |
| 33 |
| Thermal Expansion, µm/m-K | 9.9 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.3 | |
| 7.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.7 | |
| 8.5 |
Otherwise Unclassified Properties
| Density, g/cm3 | 4.5 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 41 | |
| 2.3 |
| Embodied Energy, MJ/kg | 670 | |
| 32 |
| Embodied Water, L/kg | 270 | |
| 54 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 87 to 110 | |
| 130 to 140 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1380 to 3110 | |
| 430 to 1690 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 35 | |
| 24 |
| Strength to Weight: Axial, points | 43 to 61 | |
| 24 to 33 |
| Strength to Weight: Bending, points | 39 to 49 | |
| 22 to 27 |
| Thermal Diffusivity, mm2/s | 3.4 | |
| 8.9 |
| Thermal Shock Resistance, points | 47 to 67 | |
| 24 to 32 |
Alloy Composition
| Aluminum (Al), % | 2.5 to 3.5 | |
| 0 to 0.015 |
| Carbon (C), % | 0 to 0.080 | |
| 0.36 to 0.44 |
| Chromium (Cr), % | 0 | |
| 0.9 to 1.2 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 |
| Iron (Fe), % | 0 to 0.25 | |
| 96 to 97.5 |
| Manganese (Mn), % | 0 | |
| 0.45 to 0.85 |
| Molybdenum (Mo), % | 0 | |
| 0.5 to 0.65 |
| Nitrogen (N), % | 0 to 0.030 | |
| 0 |
| Oxygen (O), % | 0 to 0.15 | |
| 0 |
| Palladium (Pd), % | 0.040 to 0.080 | |
| 0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 | |
| 0 to 0.4 |
| Sulfur (S), % | 0 | |
| 0 to 0.030 |
| Titanium (Ti), % | 92.5 to 95.5 | |
| 0 |
| Vanadium (V), % | 2.0 to 3.0 | |
| 0.25 to 0.35 |
| Residuals, % | 0 to 0.4 | |
| 0 |