Grade 18 Titanium vs. Grade 29 Titanium
Both grade 18 titanium and grade 29 titanium are titanium alloys. They have a very high 95% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.
For each property being compared, the top bar is grade 18 titanium and the bottom bar is grade 29 titanium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 110 |
| Elongation at Break, % | 11 to 17 | |
| 6.8 to 11 |
| Fatigue Strength, MPa | 330 to 480 | |
| 460 to 510 |
| Poisson's Ratio | 0.32 | |
| 0.32 |
| Reduction in Area, % | 23 | |
| 17 |
| Shear Modulus, GPa | 40 | |
| 40 |
| Shear Strength, MPa | 420 to 590 | |
| 550 to 560 |
| Tensile Strength: Ultimate (UTS), MPa | 690 to 980 | |
| 930 to 940 |
| Tensile Strength: Yield (Proof), MPa | 540 to 810 | |
| 850 to 870 |
Thermal Properties
| Latent Heat of Fusion, J/g | 410 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 330 | |
| 340 |
| Melting Completion (Liquidus), °C | 1640 | |
| 1610 |
| Melting Onset (Solidus), °C | 1590 | |
| 1560 |
| Specific Heat Capacity, J/kg-K | 550 | |
| 560 |
| Thermal Conductivity, W/m-K | 8.3 | |
| 7.3 |
| Thermal Expansion, µm/m-K | 9.9 | |
| 9.3 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.3 | |
| 1.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.7 | |
| 2.0 |
Otherwise Unclassified Properties
| Density, g/cm3 | 4.5 | |
| 4.5 |
| Embodied Carbon, kg CO2/kg material | 41 | |
| 39 |
| Embodied Energy, MJ/kg | 670 | |
| 640 |
| Embodied Water, L/kg | 270 | |
| 410 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 87 to 110 | |
| 62 to 100 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1380 to 3110 | |
| 3420 to 3540 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 35 | |
| 35 |
| Strength to Weight: Axial, points | 43 to 61 | |
| 58 to 59 |
| Strength to Weight: Bending, points | 39 to 49 | |
| 47 to 48 |
| Thermal Diffusivity, mm2/s | 3.4 | |
| 2.9 |
| Thermal Shock Resistance, points | 47 to 67 | |
| 68 to 69 |
Alloy Composition
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| Aluminum (Al), % | 2.5 to 3.5 | |
| 5.5 to 6.5 |
| Carbon (C), % | 0 to 0.080 | |
| 0 to 0.080 |
| 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 0.030 |
| Oxygen (O), % | 0 to 0.15 | |
| 0 to 0.13 |
| Palladium (Pd), % | 0.040 to 0.080 | |
| 0 |
| Ruthenium (Ru), % | 0 | |
| 0.080 to 0.14 |
| Titanium (Ti), % | 92.5 to 95.5 | |
| 88 to 90.9 |
| Vanadium (V), % | 2.0 to 3.0 | |
| 3.5 to 4.5 |
| Residuals, % | 0 to 0.4 | |
| 0 to 0.4 |