Highest-strength common aluminium (Al-Zn) — aerospace, tooling, jigs. Not for welding/marine.
| Property | Typical value |
|---|---|
| Density | 2810 kg/m³ |
| Yield | ~480 MPa |
| Tensile | ~540–570 MPa |
| Elongation | ~8 % |
| Young's E | 72 GPa |
| Hardness | ~150 HB |
| CTE | ~23 µm/m·K |
| Thermal cond. | ~130 W/m·K |
| Max service | ~120–150 °C (over-ages/softens above) |
| Poisson ν | ~0.33 |
| Shear modulus G | ~27 GPa (derived) |
| Shear strength | ~331 MPa (T6 typ) |
| Specific heat | ~870 J/kg·K |
| Elec. resistivity | ~0.052 µΩ·m (~33 %IACS, T6) |
| Melting range | ~475–635 °C |
| Fatigue (indicative) | no endurance limit; ~159 MPa at 5×10⁸ cycles — rotating-bend, polished specimen; indicative only, surface/size/loading factors apply |
~90%. Machines like a soft steel; excellent finish.
Not arc-weldable (hot cracking) — mechanical/bonded joints only.
| System | Designation |
|---|---|
| EN | EN AW-7075 [Al Zn5.5MgCu] |
| DIN | AlZnMgCu1,5 / 3.4365 |
| AISI | AA 7075 |
| ASTM | B211 / B209 7075; AMS 4045 / 4078 |
| JIS | A7075 |
| UNS | A97075 |
Equivalents & alternatives: 7075 (UNS A97075); 2014-T6 (alt high-strength). Alt: 2014, 6082 (weldable, lower strength).
The UK structural aluminium — frames, machined parts, marine. Best strength of the 6xxx weldables.
Aluminium (wrought)General-purpose heat-treatable aluminium (US-origin) — very similar to 6082, widely stocked.
Aluminium (wrought)Non-heat-treatable Al-Mg — marine, hulls, tanks. Best-in-class corrosion + weldability.
Aluminium (wrought)Free-machining aluminium (Pb/Bi) — high-volume turned parts, connectors, fittings.
