AA 7178 Grade T76511: High-Strength Aluminum Alloy for Advanced Metalworking
AA 7178, comprised of copper and magnesium as its primary alloying elements, offers uncompromising strength and accommodates a number of different metalworking processes. These processes include machining, welding, and heat treating.
Properties
General
| Property | Value | Comment |
|---|---|---|
Density | 2.7 - 2.85 g/cm³ | Typical for Wrought 7000 Series Aluminium |
Mechanical
| Property | Value | Condition | Related Standards | Comment |
|---|---|---|---|---|
Elastic modulus | 69.0 - 72.0 GPa | Typical for Wrought 7000 Series Aluminium | ||
Plane-Strain Fracture Toughnes | 22.0 - 35.0 MPa·√m | Typical for Wrought 7000 Series Aluminium | ||
Poisson's ratio | 0.33 [-] | Typical for Wrought 7000 Series Aluminium | ||
Shear modulus | 26.4 - 27.1 GPa | Typical for Wrought 7000 Series Aluminium | ||
Tensile strength | 525.0 MPa | T76511 | AA Standards, ASTM B221 | |
530.0 MPa | T76511 | AA Standards, ASTM B221 |
Thermal
| Property | Value | Comment |
|---|---|---|
Coefficient of thermal expansion | 2.1e-05 - 2.4e-05 1/K | Typical for Wrought 7000 Series Aluminium |
Melting point | 465.0 - 655.0 °C | Typical for Wrought 7000 Series Aluminium |
Specific heat capacity | 795.0 - 1050.0 J/(kg·K) | Typical for Wrought 7000 Series Aluminium |
Thermal conductivity | 121.0 - 170.0 W/(m·K) | Typical for Wrought 7000 Series Aluminium |
Electrical
| Property | Value | Comment |
|---|---|---|
Electrical conductivity | 18000000.0 - 34000000.0 S/m | Typical for Wrought 7000 Series Aluminium |
Electrical resistivity | 2.9e-08 - 5.6e-08 Ω·m | Typical for Wrought 7000 Series Aluminium |
Chemical properties
| Property | Value | Condition | Related Standards |
|---|---|---|---|
Chromium | 0.18 - 0.28 % | T76511 | AA Standards, ASTM B221 |
Copper | 1.6 - 2.4 % | T76511 | AA Standards, ASTM B221 |
Iron | 0.50 % | T76511 | AA Standards, ASTM B221 |
Magnesium | 2.4 - 3.1 % | T76511 | AA Standards, ASTM B221 |
Manganese | 0.3 % | T76511 | AA Standards, ASTM B221 |
Silicon | 0.4 % | T76511 | AA Standards, ASTM B221 |
Titanium | 0.2 % | T76511 | AA Standards, ASTM B221 |
Zinc | 6.3 - 7.3 % | T76511 | AA Standards, ASTM B221 |
Technological properties
| Property | ||
|---|---|---|
| Brazing | general: no brazing is known or developed | |
| Corrosion properties | Stress corrosion cracking: Operational damage in areas with tensile stresses transverse to the grain structure, limited damage to laboratory samples, general: good, without protection in industrial or seawater atmosphere | |
| General machinability | General: good to acceptable | |
| Workability | general (condition): not suitable | |
Metal
- AA Standard Grade 7279: Key Material Properties & Specifications
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- AA 7178 T76 – High‑Strength Magnesium Alloy for Advanced Metalworking
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- AA 7178 – High-Strength 7000 Series Aluminium Alloy for Advanced Metalworking
- AA 7178-O: Premium High-Strength Aluminum Alloy for Advanced Engineering