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