AA 2024-T42 Aluminum Alloy – Grade & Standards for Aerospace Applications
Aluminum AA 2024, known for its use in aircraft industry, is an alloy that offers excellent strength. When in the annealed condition it is readily formed and has good machinability. Though it has a relatively low level of corrosion resistance, it can be machined to a high finish.
Properties
General
| Property | Value | Condition | Related Standards |
|---|---|---|---|
Density | 2.78 g/cm³ | T42 | AA Standards, ASTM B209, ASTM B210, ASTM B211, ASTM B241, ASTM B316 |
Mechanical
| Property | Value | Condition | Related Standards | Comment |
|---|---|---|---|---|
Elastic modulus | 73.0 GPa | T42 | AA Standards, ASTM B209, ASTM B210, ASTM B211, ASTM B241, ASTM B316 | |
Plane-Strain Fracture Toughnes | 22.0 - 35.0 MPa·√m | Typical for Wrought 2000 Series Aluminium | ||
Poisson's ratio | 0.33 [-] | Typical for Wrought 2000 Series Aluminium | ||
Shear modulus | 26.0 - 27.5 GPa | Typical for Wrought 2000 Series Aluminium | ||
Tensile strength | 395.0 MPa | T42 | AA Standards, ASTM B241 | |
400.0 MPa | T42 | AA Standards, ASTM B209, ASTM B211 | ||
415.0 MPa | T42 | AA Standards, ASTM B209 | ||
420.0 MPa | T42 | AA Standards, ASTM B209 | ||
425.0 MPa | T42 | AA Standards, ASTM B209, ASTM B211, ASTM B316 | ||
440.0 MPa | T42 | AA Standards, ASTM B210 |
Thermal
| Property | Temperature | Value | Condition | Related Standards | Comment |
|---|---|---|---|---|---|
Coefficient of thermal expansion | 20 °C | 2.3199999999999998e-05 1/K | T42 | AA Standards, ASTM B209, ASTM B210, ASTM B211, ASTM B241, ASTM B316 | |
100 °C | 2.3199999999999998e-05 1/K | T42 | AA Standards, ASTM B209, ASTM B210, ASTM B211, ASTM B241, ASTM B316 | ||
Melting point | 505.0 - 635.0 °C | T42 | AA Standards, ASTM B209, ASTM B210, ASTM B211, ASTM B241, ASTM B316 | ||
Specific heat capacity | 816.0 - 963.0 J/(kg·K) | Typical for Wrought 2000 Series Aluminium | |||
Thermal conductivity | 121.0 - 193.0 W/(m·K) | T42 | AA Standards, ASTM B209, ASTM B210, ASTM B211, ASTM B241, ASTM B316 |
Electrical
| Property | Value | Condition | Related Standards |
|---|---|---|---|
Electrical conductivity | 17000000.0 - 29000000.0 S/m | T42 | AA Standards, ASTM B209, ASTM B210, ASTM B211, ASTM B241, ASTM B316 |
Electrical resistivity | 3.45e-08 - 5.88e-08 Ω·m | T42 | AA Standards, ASTM B209, ASTM B210, ASTM B211, ASTM B241, ASTM B316 |
Chemical properties
| Property | Value | Condition | Related Standards |
|---|---|---|---|
Chromium | 0.1 % | T42 | AA Standards, ASTM B209, ASTM B210, ASTM B211, ASTM B241, ASTM B316 |
Copper | 3.8 - 4.9 % | T42 | AA Standards, ASTM B209, ASTM B210, ASTM B211, ASTM B241, ASTM B316 |
Iron | 0.50 % | T42 | AA Standards, ASTM B209, ASTM B210, ASTM B211, ASTM B241, ASTM B316 |
Magnesium | 1.2 - 1.8 % | T42 | AA Standards, ASTM B209, ASTM B210, ASTM B211, ASTM B241, ASTM B316 |
Manganese | 0.3 - 0.9 % | T42 | AA Standards, ASTM B209, ASTM B210, ASTM B211, ASTM B241, ASTM B316 |
Silicon | 0.5 % | T42 | AA Standards, ASTM B209, ASTM B210, ASTM B211, ASTM B241, ASTM B316 |
Titanium | 0.15 % | T42 | AA Standards, ASTM B209, ASTM B210, ASTM B211, ASTM B241, ASTM B316 |
Zinc | 0.25 % | T42 | AA Standards, ASTM B209, ASTM B210, ASTM B211, ASTM B241, ASTM B316 |
Technological properties
| Property | ||
|---|---|---|
| Brazing | general: no brazing is known or developed | |
| Corrosion properties | Stress corrosion cracking: Betriebsschäden in Gebieten mit Zugspannungen quer zur Kornstruktur, Eingeschränkte Schäden an Laborproben (T4,T3, T351, T3510, T3511), d (T6, T861, T81, T851, T8510, T8511), general: sufficient, in principle it should be protected | |
| General machinability | General: poor (O), good to acceptable | |
| Workability | general (condition): poor(T4, T3, T351, T3510, T3511, T6), not suitable (T361, T861, T81, T851, T8510, T8511) | |
Metal
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