Titanium 6-7 vs. Grade 31 Titanium
Both titanium 6-7 and grade 31 titanium are titanium alloys. Both are furnished in the annealed condition. They have 87% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.
For each property being compared, the top bar is titanium 6-7 and the bottom bar is grade 31 titanium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 120 | |
| 110 |
| Elongation at Break, % | 11 | |
| 20 |
| Fatigue Strength, MPa | 530 | |
| 300 |
| Poisson's Ratio | 0.33 | |
| 0.32 |
| Reduction in Area, % | 29 | |
| 34 |
| Shear Modulus, GPa | 45 | |
| 41 |
| Shear Strength, MPa | 610 | |
| 320 |
| Tensile Strength: Ultimate (UTS), MPa | 1020 | |
| 510 |
| Tensile Strength: Yield (Proof), MPa | 900 | |
| 450 |
Thermal Properties
| Latent Heat of Fusion, J/g | 410 | |
| 420 |
| Maximum Temperature: Mechanical, °C | 300 | |
| 320 |
| Melting Completion (Liquidus), °C | 1700 | |
| 1660 |
| Melting Onset (Solidus), °C | 1650 | |
| 1610 |
| Specific Heat Capacity, J/kg-K | 520 | |
| 540 |
| Thermal Expansion, µm/m-K | 9.3 | |
| 8.7 |
Otherwise Unclassified Properties
| Density, g/cm3 | 5.1 | |
| 4.5 |
| Embodied Carbon, kg CO2/kg material | 34 | |
| 36 |
| Embodied Energy, MJ/kg | 540 | |
| 600 |
| Embodied Water, L/kg | 190 | |
| 230 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 | |
| 99 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 3460 | |
| 940 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 32 | |
| 35 |
| Strength to Weight: Axial, points | 56 | |
| 32 |
| Strength to Weight: Bending, points | 44 | |
| 32 |
| Thermal Shock Resistance, points | 66 | |
| 39 |
Alloy Composition
| Aluminum (Al), % | 5.5 to 6.5 | |
| 0 |
| Carbon (C), % | 0 to 0.080 | |
| 0 to 0.080 |
| Cobalt (Co), % | 0 | |
| 0.2 to 0.8 |
| Hydrogen (H), % | 0 to 0.0090 | |
| 0 to 0.015 |
| Iron (Fe), % | 0 to 0.25 | |
| 0 to 0.3 |
| Molybdenum (Mo), % | 6.5 to 7.5 | |
| 0 |
| Niobium (Nb), % | 6.5 to 7.5 | |
| 0 |
| Nitrogen (N), % | 0 to 0.050 | |
| 0 to 0.050 |
| Oxygen (O), % | 0 to 0.2 | |
| 0 to 0.35 |
| Palladium (Pd), % | 0 | |
| 0.040 to 0.080 |
| Tantalum (Ta), % | 0 to 0.5 | |
| 0 |
| Titanium (Ti), % | 84.9 to 88 | |
| 97.9 to 99.76 |
| Residuals, % | 0 | |
| 0 to 0.4 |