8021 Aluminum vs. AWS ERTi-2
8021 aluminum belongs to the aluminum alloys classification, while AWS ERTi-2 belongs to the titanium alloys.
For each property being compared, the top bar is 8021 aluminum and the bottom bar is AWS ERTi-2.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 70 | |
| 110 |
| Elongation at Break, % | 2.3 | |
| 20 |
| Fatigue Strength, MPa | 61 | |
| 190 |
| Poisson's Ratio | 0.33 | |
| 0.32 |
| Shear Modulus, GPa | 26 | |
| 40 |
| Tensile Strength: Ultimate (UTS), MPa | 160 | |
| 340 |
| Tensile Strength: Yield (Proof), MPa | 130 | |
| 280 |
Thermal Properties
| Latent Heat of Fusion, J/g | 400 | |
| 420 |
| Maximum Temperature: Mechanical, °C | 170 | |
| 320 |
| Melting Completion (Liquidus), °C | 650 | |
| 1670 |
| Melting Onset (Solidus), °C | 640 | |
| 1620 |
| Specific Heat Capacity, J/kg-K | 900 | |
| 540 |
| Thermal Conductivity, W/m-K | 220 | |
| 21 |
| Thermal Expansion, µm/m-K | 23 | |
| 8.7 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 56 | |
| 3.6 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 180 | |
| 7.1 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 9.0 | |
| 37 |
| Density, g/cm3 | 2.8 | |
| 4.5 |
| Embodied Carbon, kg CO2/kg material | 8.1 | |
| 31 |
| Embodied Energy, MJ/kg | 150 | |
| 510 |
| Embodied Water, L/kg | 1180 | |
| 110 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 3.4 | |
| 64 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 130 | |
| 360 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 49 | |
| 35 |
| Strength to Weight: Axial, points | 16 | |
| 21 |
| Strength to Weight: Bending, points | 23 | |
| 24 |
| Thermal Diffusivity, mm2/s | 88 | |
| 8.7 |
| Thermal Shock Resistance, points | 7.0 | |
| 27 |
Alloy Composition
| Aluminum (Al), % | 98 to 98.8 | |
| 0 |
| Carbon (C), % | 0 | |
| 0 to 0.030 |
| Copper (Cu), % | 0 to 0.050 | |
| 0 |
| Hydrogen (H), % | 0 | |
| 0 to 0.0080 |
| Iron (Fe), % | 1.2 to 1.7 | |
| 0 to 0.12 |
| Nitrogen (N), % | 0 | |
| 0 to 0.015 |
| Oxygen (O), % | 0 | |
| 0.080 to 0.16 |
| Silicon (Si), % | 0 to 0.15 | |
| 0 |
| Titanium (Ti), % | 0 | |
| 99.667 to 99.92 |
| Residuals, % | 0 to 0.15 | |
| 0 |