Grade 21 Titanium vs. 6101 Aluminum
Grade 21 titanium belongs to the titanium alloys classification, while 6101 aluminum belongs to the aluminum alloys. There are 19 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.
For each property being compared, the top bar is grade 21 titanium and the bottom bar is 6101 aluminum.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 140 | |
| 68 |
| Elongation at Break, % | 9.0 to 17 | |
| 10 to 25 |
| Poisson's Ratio | 0.32 | |
| 0.33 |
| Shear Modulus, GPa | 51 | |
| 26 |
Thermal Properties
| Latent Heat of Fusion, J/g | 410 | |
| 400 |
| Maximum Temperature: Mechanical, °C | 310 | |
| 160 |
| Melting Completion (Liquidus), °C | 1740 | |
| 650 |
| Melting Onset (Solidus), °C | 1690 | |
| 620 |
| Specific Heat Capacity, J/kg-K | 500 | |
| 900 |
| Thermal Conductivity, W/m-K | 7.5 | |
| 220 to 230 |
| Thermal Expansion, µm/m-K | 7.1 | |
| 23 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 60 | |
| 9.5 |
| Density, g/cm3 | 5.4 | |
| 2.7 |
| Embodied Carbon, kg CO2/kg material | 32 | |
| 8.3 |
| Embodied Energy, MJ/kg | 490 | |
| 150 |
| Embodied Water, L/kg | 180 | |
| 1190 |
Common Calculations
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 32 | |
| 50 |
| Thermal Diffusivity, mm2/s | 2.8 | |
| 89 to 93 |
Alloy Composition
| Aluminum (Al), % | 2.5 to 3.5 | |
| 97.6 to 99.4 |
| Boron (B), % | 0 | |
| 0 to 0.060 |
| Carbon (C), % | 0 to 0.050 | |
| 0 |
| Chromium (Cr), % | 0 | |
| 0 to 0.030 |
| Copper (Cu), % | 0 | |
| 0 to 0.1 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 |
| Iron (Fe), % | 0 to 0.4 | |
| 0 to 0.5 |
| Magnesium (Mg), % | 0 | |
| 0.35 to 0.8 |
| Manganese (Mn), % | 0 | |
| 0 to 0.030 |
| Molybdenum (Mo), % | 14 to 16 | |
| 0 |
| Niobium (Nb), % | 2.2 to 3.2 | |
| 0 |
| Nitrogen (N), % | 0 to 0.030 | |
| 0 |
| Oxygen (O), % | 0 to 0.17 | |
| 0 |
| Silicon (Si), % | 0.15 to 0.25 | |
| 0.3 to 0.7 |
| Titanium (Ti), % | 76 to 81.2 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 0 to 0.1 |
| Residuals, % | 0 | |
| 0 to 0.1 |