Grade 18 Titanium vs. Titanium 15-3-3-3
Both grade 18 titanium and titanium 15-3-3-3 are titanium alloys. They have 81% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.
For each property being compared, the top bar is grade 18 titanium and the bottom bar is titanium 15-3-3-3.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 100 |
| Elongation at Break, % | 11 to 17 | |
| 5.7 to 8.0 |
| Fatigue Strength, MPa | 330 to 480 | |
| 610 to 710 |
| Poisson's Ratio | 0.32 | |
| 0.33 |
| Shear Modulus, GPa | 40 | |
| 39 |
| Shear Strength, MPa | 420 to 590 | |
| 660 to 810 |
| Tensile Strength: Ultimate (UTS), MPa | 690 to 980 | |
| 1120 to 1390 |
| Tensile Strength: Yield (Proof), MPa | 540 to 810 | |
| 1100 to 1340 |
Thermal Properties
| Latent Heat of Fusion, J/g | 410 | |
| 390 |
| Maximum Temperature: Mechanical, °C | 330 | |
| 430 |
| Melting Completion (Liquidus), °C | 1640 | |
| 1620 |
| Melting Onset (Solidus), °C | 1590 | |
| 1560 |
| Specific Heat Capacity, J/kg-K | 550 | |
| 520 |
| Thermal Conductivity, W/m-K | 8.3 | |
| 8.1 |
| Thermal Expansion, µm/m-K | 9.9 | |
| 9.8 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.3 | |
| 1.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.7 | |
| 2.3 |
Otherwise Unclassified Properties
| Density, g/cm3 | 4.5 | |
| 4.8 |
| Embodied Carbon, kg CO2/kg material | 41 | |
| 59 |
| Embodied Energy, MJ/kg | 670 | |
| 950 |
| Embodied Water, L/kg | 270 | |
| 260 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 87 to 110 | |
| 78 to 89 |
| Stiffness to Weight: Axial, points | 13 | |
| 12 |
| Stiffness to Weight: Bending, points | 35 | |
| 32 |
| Strength to Weight: Axial, points | 43 to 61 | |
| 64 to 80 |
| Strength to Weight: Bending, points | 39 to 49 | |
| 50 to 57 |
| Thermal Diffusivity, mm2/s | 3.4 | |
| 3.2 |
| Thermal Shock Resistance, points | 47 to 67 | |
| 79 to 98 |
Alloy Composition
| Aluminum (Al), % | 2.5 to 3.5 | |
| 2.5 to 3.5 |
| Carbon (C), % | 0 to 0.080 | |
| 0 to 0.050 |
| Chromium (Cr), % | 0 | |
| 2.5 to 3.5 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 to 0.015 |
| Iron (Fe), % | 0 to 0.25 | |
| 0 to 0.25 |
| Nitrogen (N), % | 0 to 0.030 | |
| 0 to 0.050 |
| Oxygen (O), % | 0 to 0.15 | |
| 0 to 0.13 |
| Palladium (Pd), % | 0.040 to 0.080 | |
| 0 |
| Tin (Sn), % | 0 | |
| 2.5 to 3.5 |
| Titanium (Ti), % | 92.5 to 95.5 | |
| 72.6 to 78.5 |
| Vanadium (V), % | 2.0 to 3.0 | |
| 14 to 16 |
| Residuals, % | 0 | |
| 0 to 0.4 |