201.0 Aluminum vs. Grade 21 Titanium
201.0 aluminum belongs to the aluminum alloys classification, while grade 21 titanium belongs to the titanium alloys. There are 27 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.
For each property being compared, the top bar is 201.0 aluminum and the bottom bar is grade 21 titanium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 71 | |
| 140 |
| Elongation at Break, % | 4.4 to 20 | |
| 9.0 to 17 |
| Fatigue Strength, MPa | 120 to 150 | |
| 550 to 660 |
| Poisson's Ratio | 0.33 | |
| 0.32 |
| Shear Modulus, GPa | 27 | |
| 51 |
| Shear Strength, MPa | 290 | |
| 550 to 790 |
| Tensile Strength: Ultimate (UTS), MPa | 370 to 470 | |
| 890 to 1340 |
| Tensile Strength: Yield (Proof), MPa | 220 to 400 | |
| 870 to 1170 |
Thermal Properties
| Latent Heat of Fusion, J/g | 390 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 170 | |
| 310 |
| Melting Completion (Liquidus), °C | 650 | |
| 1740 |
| Melting Onset (Solidus), °C | 570 | |
| 1690 |
| Specific Heat Capacity, J/kg-K | 870 | |
| 500 |
| Thermal Conductivity, W/m-K | 120 | |
| 7.5 |
| Thermal Expansion, µm/m-K | 19 | |
| 7.1 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 38 | |
| 60 |
| Density, g/cm3 | 3.1 | |
| 5.4 |
| Embodied Carbon, kg CO2/kg material | 8.7 | |
| 32 |
| Embodied Energy, MJ/kg | 160 | |
| 490 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 19 to 63 | |
| 110 to 180 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 330 to 1160 | |
| 2760 to 5010 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 45 | |
| 32 |
| Strength to Weight: Axial, points | 33 to 42 | |
| 46 to 69 |
| Strength to Weight: Bending, points | 37 to 44 | |
| 38 to 50 |
| Thermal Diffusivity, mm2/s | 45 | |
| 2.8 |
| Thermal Shock Resistance, points | 19 to 25 | |
| 66 to 100 |
Alloy Composition
| Aluminum (Al), % | 92.1 to 95.1 | |
| 2.5 to 3.5 |
| Carbon (C), % | 0 | |
| 0 to 0.050 |
| Copper (Cu), % | 4.0 to 5.2 | |
| 0 |
| Hydrogen (H), % | 0 | |
| 0 to 0.015 |
| Iron (Fe), % | 0 to 0.15 | |
| 0 to 0.4 |
| Magnesium (Mg), % | 0.15 to 0.55 | |
| 0 |
| Manganese (Mn), % | 0.2 to 0.5 | |
| 0 |
| Molybdenum (Mo), % | 0 | |
| 14 to 16 |
| Niobium (Nb), % | 0 | |
| 2.2 to 3.2 |
| Nitrogen (N), % | 0 | |
| 0 to 0.030 |
| Oxygen (O), % | 0 | |
| 0 to 0.17 |
| Silicon (Si), % | 0 to 0.1 | |
| 0.15 to 0.25 |
| Silver (Ag), % | 0.4 to 1.0 | |
| 0 |
| Titanium (Ti), % | 0.15 to 0.35 | |
| 76 to 81.2 |
| Residuals, % | 0 | |
| 0 to 0.4 |