Grade 18 Titanium vs. Titanium 6-6-2
Both grade 18 titanium and titanium 6-6-2 are titanium alloys. They have 89% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.
For each property being compared, the top bar is grade 18 titanium and the bottom bar is titanium 6-6-2.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 120 |
| Elongation at Break, % | 11 to 17 | |
| 6.7 to 9.0 |
| Fatigue Strength, MPa | 330 to 480 | |
| 590 to 670 |
| Poisson's Ratio | 0.32 | |
| 0.32 |
| Reduction in Area, % | 23 | |
| 17 to 23 |
| Shear Modulus, GPa | 40 | |
| 44 |
| Shear Strength, MPa | 420 to 590 | |
| 670 to 800 |
| Tensile Strength: Ultimate (UTS), MPa | 690 to 980 | |
| 1140 to 1370 |
| Tensile Strength: Yield (Proof), MPa | 540 to 810 | |
| 1040 to 1230 |
Thermal Properties
| Latent Heat of Fusion, J/g | 410 | |
| 400 |
| Maximum Temperature: Mechanical, °C | 330 | |
| 310 |
| Melting Completion (Liquidus), °C | 1640 | |
| 1610 |
| Melting Onset (Solidus), °C | 1590 | |
| 1560 |
| Specific Heat Capacity, J/kg-K | 550 | |
| 540 |
| Thermal Conductivity, W/m-K | 8.3 | |
| 5.5 |
| Thermal Expansion, µm/m-K | 9.9 | |
| 9.4 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.3 | |
| 1.1 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.7 | |
| 2.1 |
Otherwise Unclassified Properties
| Density, g/cm3 | 4.5 | |
| 4.8 |
| Embodied Carbon, kg CO2/kg material | 41 | |
| 29 |
| Embodied Energy, MJ/kg | 670 | |
| 470 |
| Embodied Water, L/kg | 270 | |
| 200 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 87 to 110 | |
| 89 to 99 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 35 | |
| 34 |
| Strength to Weight: Axial, points | 43 to 61 | |
| 66 to 79 |
| Strength to Weight: Bending, points | 39 to 49 | |
| 50 to 57 |
| Thermal Diffusivity, mm2/s | 3.4 | |
| 2.1 |
| Thermal Shock Resistance, points | 47 to 67 | |
| 75 to 90 |
Alloy Composition
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| Aluminum (Al), % | 2.5 to 3.5 | |
| 5.0 to 6.0 |
| Carbon (C), % | 0 to 0.080 | |
| 0 to 0.050 |
| Copper (Cu), % | 0 | |
| 0.35 to 1.0 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 to 0.015 |
| Iron (Fe), % | 0 to 0.25 | |
| 0.35 to 1.0 |
| Molybdenum (Mo), % | 0 | |
| 5.0 to 6.0 |
| Nitrogen (N), % | 0 to 0.030 | |
| 0 to 0.040 |
| Oxygen (O), % | 0 to 0.15 | |
| 0 to 0.2 |
| Palladium (Pd), % | 0.040 to 0.080 | |
| 0 |
| Tin (Sn), % | 0 | |
| 1.5 to 2.5 |
| Titanium (Ti), % | 92.5 to 95.5 | |
| 82.8 to 87.8 |
| Vanadium (V), % | 2.0 to 3.0 | |
| 0 |
| Residuals, % | 0 to 0.4 | |
| 0 to 0.4 |