7075-T6 Aluminum vs. 7075-T73 Aluminum
Both 7075-T6 aluminum and 7075-T73 aluminum are variants of the same material. They share alloy composition and many physical properties, but develop different mechanical properties as a result of different processing.
For each property being compared, the top bar is 7075-T6 aluminum and the bottom bar is 7075-T73 aluminum.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 150 | |
| 140 |
| Elastic (Young's, Tensile) Modulus, GPa | 70 | |
| 70 |
| Elongation at Break, % | 7.9 | |
| 7.1 |
| Fatigue Strength, MPa | 160 | |
| 160 |
| Poisson's Ratio | 0.32 | |
| 0.32 |
| Shear Modulus, GPa | 26 | |
| 26 |
| Shear Strength, MPa | 330 | |
| 290 |
| Tensile Strength: Ultimate (UTS), MPa | 560 | |
| 500 |
| Tensile Strength: Yield (Proof), MPa | 480 | |
| 410 |
Thermal Properties
| Latent Heat of Fusion, J/g | 380 | |
| 380 |
| Maximum Temperature: Mechanical, °C | 200 | |
| 200 |
| Melting Completion (Liquidus), °C | 640 | |
| 640 |
| Melting Onset (Solidus), °C | 480 | |
| 480 |
| Specific Heat Capacity, J/kg-K | 870 | |
| 870 |
| Thermal Conductivity, W/m-K | 130 | |
| 130 |
| Thermal Expansion, µm/m-K | 23 | |
| 23 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 33 | |
| 33 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 98 | |
| 98 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 10 | |
| 10 |
| Calomel Potential, mV | -750 | |
| -750 |
| Density, g/cm3 | 3.0 | |
| 3.0 |
| Embodied Carbon, kg CO2/kg material | 8.3 | |
| 8.3 |
| Embodied Energy, MJ/kg | 150 | |
| 150 |
| Embodied Water, L/kg | 1120 | |
| 1120 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 42 | |
| 33 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1630 | |
| 1230 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 46 | |
| 46 |
| Strength to Weight: Axial, points | 51 | |
| 46 |
| Strength to Weight: Bending, points | 50 | |
| 46 |
| Thermal Diffusivity, mm2/s | 50 | |
| 50 |
| Thermal Shock Resistance, points | 24 | |
| 22 |
Alloy Composition
| Aluminum (Al), % | 86.9 to 91.4 | |
| 86.9 to 91.4 |
| Chromium (Cr), % | 0.18 to 0.28 | |
| 0.18 to 0.28 |
| Copper (Cu), % | 1.2 to 2.0 | |
| 1.2 to 2.0 |
| Iron (Fe), % | 0 to 0.5 | |
| 0 to 0.5 |
| Magnesium (Mg), % | 2.1 to 2.9 | |
| 2.1 to 2.9 |
| Manganese (Mn), % | 0 to 0.3 | |
| 0 to 0.3 |
| Silicon (Si), % | 0 to 0.4 | |
| 0 to 0.4 |
| Titanium (Ti), % | 0 to 0.2 | |
| 0 to 0.2 |
| Zinc (Zn), % | 5.1 to 6.1 | |
| 5.1 to 6.1 |
| Zirconium (Zr), % | 0 to 0.25 | |
| 0 to 0.25 |
| Residuals, % | 0 | |
| 0 to 0.15 |