Titanium 6-2-4-2 vs. Grade 38 Titanium
Both titanium 6-2-4-2 and grade 38 titanium are titanium alloys. Both are furnished in the annealed condition. They have 90% of their average alloy composition in common.
For each property being compared, the top bar is titanium 6-2-4-2 and the bottom bar is grade 38 titanium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 110 |
| Elongation at Break, % | 8.6 | |
| 11 |
| Fatigue Strength, MPa | 490 | |
| 530 |
| Poisson's Ratio | 0.32 | |
| 0.32 |
| Reduction in Area, % | 21 | |
| 29 |
| Shear Modulus, GPa | 40 | |
| 40 |
| Shear Strength, MPa | 560 | |
| 600 |
| Tensile Strength: Ultimate (UTS), MPa | 950 | |
| 1000 |
| Tensile Strength: Yield (Proof), MPa | 880 | |
| 910 |
Thermal Properties
| Latent Heat of Fusion, J/g | 400 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 300 | |
| 330 |
| Melting Completion (Liquidus), °C | 1590 | |
| 1620 |
| Melting Onset (Solidus), °C | 1540 | |
| 1570 |
| Specific Heat Capacity, J/kg-K | 540 | |
| 550 |
| Thermal Conductivity, W/m-K | 6.9 | |
| 8.0 |
| Thermal Expansion, µm/m-K | 9.5 | |
| 9.3 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 0.9 | |
| 1.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 1.8 | |
| 2.4 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 42 | |
| 36 |
| Density, g/cm3 | 4.6 | |
| 4.5 |
| Embodied Carbon, kg CO2/kg material | 32 | |
| 35 |
| Embodied Energy, MJ/kg | 520 | |
| 560 |
| Embodied Water, L/kg | 210 | |
| 160 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 79 | |
| 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 3640 | |
| 3840 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 34 | |
| 35 |
| Strength to Weight: Axial, points | 57 | |
| 62 |
| Strength to Weight: Bending, points | 46 | |
| 49 |
| Thermal Diffusivity, mm2/s | 2.8 | |
| 3.2 |
| Thermal Shock Resistance, points | 67 | |
| 72 |
Alloy Composition
| Aluminum (Al), % | 5.5 to 6.5 | |
| 3.5 to 4.5 |
| Carbon (C), % | 0 to 0.050 | |
| 0 to 0.080 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 to 0.015 |
| Iron (Fe), % | 0 to 0.25 | |
| 1.2 to 1.8 |
| Molybdenum (Mo), % | 1.8 to 2.2 | |
| 0 |
| Nitrogen (N), % | 0 to 0.050 | |
| 0 to 0.030 |
| Oxygen (O), % | 0 to 0.15 | |
| 0.2 to 0.3 |
| Silicon (Si), % | 0.060 to 0.12 | |
| 0 |
| Tin (Sn), % | 1.8 to 2.2 | |
| 0 |
| Titanium (Ti), % | 83.7 to 87.2 | |
| 89.9 to 93.1 |
| Vanadium (V), % | 0 | |
| 2.0 to 3.0 |
| Zirconium (Zr), % | 3.6 to 4.4 | |
| 0 |
| Residuals, % | 0 | |
| 0 to 0.4 |