AA 2024 Grade T451 – High-Strength Aluminum Alloy 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 | T451 | AA Standards |
Mechanical
| Property | Value | Condition | Related Standards | Comment |
|---|---|---|---|---|
Bending Fatigue Strength | 140.0 MPa | T451 | AA Standards | |
Elastic modulus | 73.0 GPa | T451 | AA Standards | |
Hardness, Brinell | 120.0 [-] | T451 | AA Standards | |
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 | 472.0 MPa | T451 | AA Standards |
Thermal
| Property | Temperature | Value | Condition | Related Standards | Comment |
|---|---|---|---|---|---|
Coefficient of thermal expansion | 20 °C | 2.3199999999999998e-05 1/K | T451 | AA Standards | |
100 °C | 2.3199999999999998e-05 1/K | T451 | AA Standards | ||
Melting point | 505.0 - 635.0 °C | T451 | AA Standards | ||
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) | T451 | AA Standards |
Electrical
| Property | Value | Condition | Related Standards |
|---|---|---|---|
Electrical conductivity | 17000000.0 - 29000000.0 S/m | T451 | AA Standards |
Electrical resistivity | 3.45e-08 - 5.88e-08 Ω·m | T451 | AA Standards |
Chemical properties
| Property | Value | Condition | Related Standards |
|---|---|---|---|
Chromium | 0.1 % | T451 | AA Standards |
Copper | 3.8 - 4.9 % | T451 | AA Standards |
Iron | 0.50 % | T451 | AA Standards |
Magnesium | 1.2 - 1.8 % | T451 | AA Standards |
Manganese | 0.3 - 0.9 % | T451 | AA Standards |
Silicon | 0.5 % | T451 | AA Standards |
Titanium | 0.15 % | T451 | AA Standards |
Zinc | 0.25 % | T451 | AA Standards |
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) | |
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