Titanium 15-3-3-3 vs. Grade 18 Titanium
Both titanium 15-3-3-3 and grade 18 titanium 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 titanium 15-3-3-3 and the bottom bar is grade 18 titanium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 100 | |
| 110 |
| Elongation at Break, % | 5.7 to 8.0 | |
| 11 to 17 |
| Fatigue Strength, MPa | 610 to 710 | |
| 330 to 480 |
| Poisson's Ratio | 0.33 | |
| 0.32 |
| Shear Modulus, GPa | 39 | |
| 40 |
| Shear Strength, MPa | 660 to 810 | |
| 420 to 590 |
| Tensile Strength: Ultimate (UTS), MPa | 1120 to 1390 | |
| 690 to 980 |
| Tensile Strength: Yield (Proof), MPa | 1100 to 1340 | |
| 540 to 810 |
Thermal Properties
| Latent Heat of Fusion, J/g | 390 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 430 | |
| 330 |
| Melting Completion (Liquidus), °C | 1620 | |
| 1640 |
| Melting Onset (Solidus), °C | 1560 | |
| 1590 |
| Specific Heat Capacity, J/kg-K | 520 | |
| 550 |
| Thermal Conductivity, W/m-K | 8.1 | |
| 8.3 |
| Thermal Expansion, µm/m-K | 9.8 | |
| 9.9 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.2 | |
| 1.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.3 | |
| 2.7 |
Otherwise Unclassified Properties
| Density, g/cm3 | 4.8 | |
| 4.5 |
| Embodied Carbon, kg CO2/kg material | 59 | |
| 41 |
| Embodied Energy, MJ/kg | 950 | |
| 670 |
| Embodied Water, L/kg | 260 | |
| 270 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 78 to 89 | |
| 87 to 110 |
| Stiffness to Weight: Axial, points | 12 | |
| 13 |
| Stiffness to Weight: Bending, points | 32 | |
| 35 |
| Strength to Weight: Axial, points | 64 to 80 | |
| 43 to 61 |
| Strength to Weight: Bending, points | 50 to 57 | |
| 39 to 49 |
| Thermal Diffusivity, mm2/s | 3.2 | |
| 3.4 |
| Thermal Shock Resistance, points | 79 to 98 | |
| 47 to 67 |
Alloy Composition
| Aluminum (Al), % | 2.5 to 3.5 | |
| 2.5 to 3.5 |
| Carbon (C), % | 0 to 0.050 | |
| 0 to 0.080 |
| Chromium (Cr), % | 2.5 to 3.5 | |
| 0 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 to 0.015 |
| Iron (Fe), % | 0 to 0.25 | |
| 0 to 0.25 |
| Nitrogen (N), % | 0 to 0.050 | |
| 0 to 0.030 |
| Oxygen (O), % | 0 to 0.13 | |
| 0 to 0.15 |
| Palladium (Pd), % | 0 | |
| 0.040 to 0.080 |
| Tin (Sn), % | 2.5 to 3.5 | |
| 0 |
| Titanium (Ti), % | 72.6 to 78.5 | |
| 92.5 to 95.5 |
| Vanadium (V), % | 14 to 16 | |
| 2.0 to 3.0 |
| Residuals, % | 0 | |
| 0 to 0.4 |