Solution-treated Grade 20 Titanium vs. Solution-treated Grade 21 Titanium
Both solution-treated grade 20 titanium and solution-treated grade 21 titanium are titanium alloys. Both are furnished in the solution annealed (AT) condition. They have 81% of their average alloy composition in common. There are 26 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 solution-treated grade 20 titanium and the bottom bar is solution-treated grade 21 titanium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 120 | |
| 140 |
| Elongation at Break, % | 17 | |
| 17 |
| Fatigue Strength, MPa | 550 | |
| 550 |
| Poisson's Ratio | 0.32 | |
| 0.32 |
| Reduction in Area, % | 23 | |
| 22 |
| Shear Modulus, GPa | 47 | |
| 51 |
| Shear Strength, MPa | 560 | |
| 550 |
| Tensile Strength: Ultimate (UTS), MPa | 900 | |
| 890 |
| Tensile Strength: Yield (Proof), MPa | 850 | |
| 870 |
Thermal Properties
| Latent Heat of Fusion, J/g | 400 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 370 | |
| 310 |
| Melting Completion (Liquidus), °C | 1660 | |
| 1740 |
| Melting Onset (Solidus), °C | 1600 | |
| 1690 |
| Specific Heat Capacity, J/kg-K | 520 | |
| 500 |
| Thermal Expansion, µm/m-K | 9.6 | |
| 7.1 |
Otherwise Unclassified Properties
| Density, g/cm3 | 5.0 | |
| 5.4 |
| Embodied Carbon, kg CO2/kg material | 52 | |
| 32 |
| Embodied Energy, MJ/kg | 860 | |
| 490 |
| Embodied Water, L/kg | 350 | |
| 180 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 150 | |
| 150 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 2940 | |
| 2760 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 33 | |
| 32 |
| Strength to Weight: Axial, points | 50 | |
| 46 |
| Strength to Weight: Bending, points | 41 | |
| 38 |
| Thermal Shock Resistance, points | 55 | |
| 66 |
Alloy Composition
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| Aluminum (Al), % | 3.0 to 4.0 | |
| 2.5 to 3.5 |
| Carbon (C), % | 0 to 0.050 | |
| 0 to 0.050 |
| Chromium (Cr), % | 5.5 to 6.5 | |
| 0 |
| Hydrogen (H), % | 0 to 0.020 | |
| 0 to 0.015 |
| Iron (Fe), % | 0 to 0.3 | |
| 0 to 0.4 |
| Molybdenum (Mo), % | 3.5 to 4.5 | |
| 14 to 16 |
| Niobium (Nb), % | 0 | |
| 2.2 to 3.2 |
| Nitrogen (N), % | 0 to 0.030 | |
| 0 to 0.030 |
| Oxygen (O), % | 0 to 0.12 | |
| 0 to 0.17 |
| Palladium (Pd), % | 0.040 to 0.080 | |
| 0 |
| Silicon (Si), % | 0 | |
| 0.15 to 0.25 |
| Titanium (Ti), % | 71 to 77 | |
| 76 to 81.2 |
| Vanadium (V), % | 7.5 to 8.5 | |
| 0 |
| Zirconium (Zr), % | 3.5 to 4.5 | |
| 0 |
| Residuals, % | 0 to 0.4 | |
| 0 to 0.4 |