Grade 20 Titanium vs. Grade 18 Titanium
Both grade 20 titanium and grade 18 titanium are titanium alloys. They have 80% of their average alloy composition in common. There are 26 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 20 titanium and the bottom bar is grade 18 titanium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 120 | |
| 110 |
| Elongation at Break, % | 5.7 to 17 | |
| 11 to 17 |
| Fatigue Strength, MPa | 550 to 630 | |
| 330 to 480 |
| Poisson's Ratio | 0.32 | |
| 0.32 |
| Reduction in Area, % | 23 | |
| 23 |
| Shear Modulus, GPa | 47 | |
| 40 |
| Shear Strength, MPa | 560 to 740 | |
| 420 to 590 |
| Tensile Strength: Ultimate (UTS), MPa | 900 to 1270 | |
| 690 to 980 |
| Tensile Strength: Yield (Proof), MPa | 850 to 1190 | |
| 540 to 810 |
Thermal Properties
| Latent Heat of Fusion, J/g | 400 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 370 | |
| 330 |
| Melting Completion (Liquidus), °C | 1660 | |
| 1640 |
| Melting Onset (Solidus), °C | 1600 | |
| 1590 |
| Specific Heat Capacity, J/kg-K | 520 | |
| 550 |
| Thermal Expansion, µm/m-K | 9.6 | |
| 9.9 |
Otherwise Unclassified Properties
| Density, g/cm3 | 5.0 | |
| 4.5 |
| Embodied Carbon, kg CO2/kg material | 52 | |
| 41 |
| Embodied Energy, MJ/kg | 860 | |
| 670 |
| Embodied Water, L/kg | 350 | |
| 270 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 71 to 150 | |
| 87 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 2940 to 5760 | |
| 1380 to 3110 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 33 | |
| 35 |
| Strength to Weight: Axial, points | 50 to 70 | |
| 43 to 61 |
| Strength to Weight: Bending, points | 41 to 52 | |
| 39 to 49 |
| Thermal Shock Resistance, points | 55 to 77 | |
| 47 to 67 |
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 0.080 |
| 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 0.25 |
| Molybdenum (Mo), % | 3.5 to 4.5 | |
| 0 |
| Nitrogen (N), % | 0 to 0.030 | |
| 0 to 0.030 |
| Oxygen (O), % | 0 to 0.12 | |
| 0 to 0.15 |
| Palladium (Pd), % | 0.040 to 0.080 | |
| 0.040 to 0.080 |
| Titanium (Ti), % | 71 to 77 | |
| 92.5 to 95.5 |
| Vanadium (V), % | 7.5 to 8.5 | |
| 2.0 to 3.0 |
| Zirconium (Zr), % | 3.5 to 4.5 | |
| 0 |
| Residuals, % | 0 to 0.4 | |
| 0 to 0.4 |