Grade 21 Titanium vs. Titanium 15-3-3-3
Both grade 21 titanium and titanium 15-3-3-3 are titanium alloys. They have 79% of their average alloy composition in common. There are 27 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 21 titanium and the bottom bar is titanium 15-3-3-3.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 140 | |
| 100 |
| Elongation at Break, % | 9.0 to 17 | |
| 5.7 to 8.0 |
| Fatigue Strength, MPa | 550 to 660 | |
| 610 to 710 |
| Poisson's Ratio | 0.32 | |
| 0.33 |
| Shear Modulus, GPa | 51 | |
| 39 |
| Shear Strength, MPa | 550 to 790 | |
| 660 to 810 |
| Tensile Strength: Ultimate (UTS), MPa | 890 to 1340 | |
| 1120 to 1390 |
| Tensile Strength: Yield (Proof), MPa | 870 to 1170 | |
| 1100 to 1340 |
Thermal Properties
| Latent Heat of Fusion, J/g | 410 | |
| 390 |
| Maximum Temperature: Mechanical, °C | 310 | |
| 430 |
| Melting Completion (Liquidus), °C | 1740 | |
| 1620 |
| Melting Onset (Solidus), °C | 1690 | |
| 1560 |
| Specific Heat Capacity, J/kg-K | 500 | |
| 520 |
| Thermal Conductivity, W/m-K | 7.5 | |
| 8.1 |
| Thermal Expansion, µm/m-K | 7.1 | |
| 9.8 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 60 | |
| 40 |
| Density, g/cm3 | 5.4 | |
| 4.8 |
| Embodied Carbon, kg CO2/kg material | 32 | |
| 59 |
| Embodied Energy, MJ/kg | 490 | |
| 950 |
| Embodied Water, L/kg | 180 | |
| 260 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 to 180 | |
| 78 to 89 |
| Stiffness to Weight: Axial, points | 14 | |
| 12 |
| Stiffness to Weight: Bending, points | 32 | |
| 32 |
| Strength to Weight: Axial, points | 46 to 69 | |
| 64 to 80 |
| Strength to Weight: Bending, points | 38 to 50 | |
| 50 to 57 |
| Thermal Diffusivity, mm2/s | 2.8 | |
| 3.2 |
| Thermal Shock Resistance, points | 66 to 100 | |
| 79 to 98 |
Alloy Composition
| Aluminum (Al), % | 2.5 to 3.5 | |
| 2.5 to 3.5 |
| Carbon (C), % | 0 to 0.050 | |
| 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 0.4 | |
| 0 to 0.25 |
| Molybdenum (Mo), % | 14 to 16 | |
| 0 |
| Niobium (Nb), % | 2.2 to 3.2 | |
| 0 |
| Nitrogen (N), % | 0 to 0.030 | |
| 0 to 0.050 |
| Oxygen (O), % | 0 to 0.17 | |
| 0 to 0.13 |
| Silicon (Si), % | 0.15 to 0.25 | |
| 0 |
| Tin (Sn), % | 0 | |
| 2.5 to 3.5 |
| Titanium (Ti), % | 76 to 81.2 | |
| 72.6 to 78.5 |
| Vanadium (V), % | 0 | |
| 14 to 16 |
| Residuals, % | 0 | |
| 0 to 0.4 |