Grade 21 Titanium vs. EN AC-21200 Aluminum
Grade 21 titanium belongs to the titanium alloys classification, while EN AC-21200 aluminum belongs to the aluminum alloys. There are 27 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 grade 21 titanium and the bottom bar is EN AC-21200 aluminum.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 140 | |
| 71 |
| Elongation at Break, % | 9.0 to 17 | |
| 3.9 to 6.2 |
| Fatigue Strength, MPa | 550 to 660 | |
| 110 to 130 |
| Poisson's Ratio | 0.32 | |
| 0.33 |
| Shear Modulus, GPa | 51 | |
| 27 |
| Tensile Strength: Ultimate (UTS), MPa | 890 to 1340 | |
| 410 to 440 |
| Tensile Strength: Yield (Proof), MPa | 870 to 1170 | |
| 270 to 360 |
Thermal Properties
| Latent Heat of Fusion, J/g | 410 | |
| 390 |
| Maximum Temperature: Mechanical, °C | 310 | |
| 170 |
| Melting Completion (Liquidus), °C | 1740 | |
| 660 |
| Melting Onset (Solidus), °C | 1690 | |
| 550 |
| Specific Heat Capacity, J/kg-K | 500 | |
| 880 |
| Thermal Conductivity, W/m-K | 7.5 | |
| 130 |
| Thermal Expansion, µm/m-K | 7.1 | |
| 23 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 60 | |
| 10 |
| Density, g/cm3 | 5.4 | |
| 3.0 |
| Embodied Carbon, kg CO2/kg material | 32 | |
| 8.0 |
| Embodied Energy, MJ/kg | 490 | |
| 150 |
| Embodied Water, L/kg | 180 | |
| 1150 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 to 180 | |
| 16 to 22 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 2760 to 5010 | |
| 500 to 930 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 32 | |
| 46 |
| Strength to Weight: Axial, points | 46 to 69 | |
| 38 to 40 |
| Strength to Weight: Bending, points | 38 to 50 | |
| 41 to 43 |
| Thermal Diffusivity, mm2/s | 2.8 | |
| 49 |
| Thermal Shock Resistance, points | 66 to 100 | |
| 18 to 19 |
Alloy Composition
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| Aluminum (Al), % | 2.5 to 3.5 | |
| 93.3 to 95.7 |
| Carbon (C), % | 0 to 0.050 | |
| 0 |
| Copper (Cu), % | 0 | |
| 4.0 to 5.0 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 |
| Iron (Fe), % | 0 to 0.4 | |
| 0 to 0.2 |
| Lead (Pb), % | 0 | |
| 0 to 0.030 |
| Magnesium (Mg), % | 0 | |
| 0.15 to 0.5 |
| Manganese (Mn), % | 0 | |
| 0.2 to 0.5 |
| Molybdenum (Mo), % | 14 to 16 | |
| 0 |
| Nickel (Ni), % | 0 | |
| 0 to 0.050 |
| 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 to 0.1 |
| Tin (Sn), % | 0 | |
| 0 to 0.030 |
| Titanium (Ti), % | 76 to 81.2 | |
| 0 to 0.1 |
| Zinc (Zn), % | 0 | |
| 0 to 0.1 |
| Residuals, % | 0 to 0.4 | |
| 0 to 0.1 |