2524 Aluminum alloy,Aluminum 2524 alloy,E FORU

### **Aluminum Alloy 2524 Product Introduction** **Aluminum Alloy 2524** is a high-tech, damage-tolerant Al-Cu-Mg alloy developed as a direct and superior successor to the classic 2024 alloy. Through precise control of impurity levels and advanced processing techniques, AA2524 offers a dramatic improvement in **fracture toughness** and **fatigue crack growth resistance**. It was specifically engineered for the next generation of commercial aircraft, where enhanced durability, safety, and weight savings are critical. It is now a benchmark material for damage-tolerant aerospace structures. --- #### **1. Chemical Composition** The composition of AA2524 is a refined version of 2024, with stricter control over iron and silicon content to maximize toughness. Key elements are (typical values in weight %): | Element | Content (%) | | :--- | :--- | | **Copper (Cu)** | 4.0 - 4.5 | | **Magnesium (Mg)** | 1.2 - 1.6 | | **Manganese (Mn)** | 0.45 - 0.7 | | **Iron (Fe)** | 0.08 max | *(Tighter control than 2024)* | | **Silicon (Si)** | 0.06 max | *(Tighter control than 2024)* | | **Zinc (Zn)** | 0.10 max | | **Titanium (Ti)** | 0.10 max | | **Other Impurities** | each 0.05 max, total 0.15 max | | **Aluminum (Al)** | Balance | * **Copper (Cu)** and **Magnesium (Mg)** are the primary strengthening elements, forming the S' (Al₂CuMg) precipitates. * **Critically Low Iron (Fe) and Silicon (Si):** This is the key to its superior performance. Reducing these impurities minimizes the formation of brittle intermetallic particles that act as initiation sites for fatigue cracks, thereby significantly improving toughness and fatigue life. --- #### **2. Physical Properties** | Property | Value / Description | | :--- | :--- | | **Density** | Approximately 2.78 g/cm³ | | **Melting Range** | ~ 500 - 650 °C | | **Modulus of Elasticity** | Approximately 73 GPa (10.6 x 10⁶ psi) | | **Thermal Conductivity** | ~ 120-130 W/m·K (at 25°C) | | **Electrical Conductivity** | ~ 30-40% IACS | | **Coefficient of Thermal Expansion** | ~ 23.2 x 10⁻⁶ /K | --- #### **3. Mechanical Properties** AA2524 is primarily supplied in T3-type tempers (solution heat-treated, cold worked, and naturally aged) to optimize its damage tolerance. Its key improvement is not in ultimate strength, but in its ability to resist crack propagation. Typical properties for 2524-T3 sheet/plate are: * **Tensile Ultimate Strength:** 440 - 480 MPa (64 - 70 ksi) * **Tensile Yield Strength:** 290 - 330 MPa (42 - 48 ksi) * **Elongation:** 12 - 18% * **Fracture Toughness:** Exceptionally high, a significant improvement over 2024-T3, especially in the short-transverse direction. * **Fatigue Crack Growth Resistance:** Excellent; its resistance to the propagation of small cracks is vastly superior to 2024-T3, leading to a longer operational life. --- #### **4. International Standards** As a premium aerospace alloy, AA2524 is covered by key industry and original equipment manufacturer (OEM) standards. * **AMS:** **AMS 4254** (This is the primary Aerospace Material Specification for 2524 alloy plate). * **ASTM:** While specific ASTM standards may not be as common, its properties are often verified against the testing requirements of specifications like **ASTM B209**. * **OEM Specifications:** It is famously specified and extensively used by **The Boeing Company** for its commercial aircraft, most notably the **Boeing 777** and **787 Dreamliner** programs, where it is a defining material for the fuselage and wing skins. --- #### **5. Product Applications** The primary application of AA2524 is in the aerospace industry, where its enhanced damage tolerance allows for lighter and safer airframe designs. * **Aircraft Fuselage Skins:** Its superior fatigue resistance is critical for withstanding pressurization cycles. * **Lower Wing Skins and Upper Wing Planks:** Resists tensile and compressive cyclic loads, significantly improving the aircraft's fatigue life. * **Bulkheads** and other primary structural components requiring high damage tolerance. --- #### **6. Key Advantages** * **Superior Damage Tolerance:** Offers an unmatched combination of high fracture toughness and exceptionally slow fatigue crack growth rates in its class. * **Extended Service Life:** Allows for longer inspection intervals and increases the overall safe-life of the aircraft structure. * **Weight Reduction:** Enables the design of lighter structures by allowing for higher design allowables related to damage tolerance, contributing to better fuel efficiency. * **Proven Performance:** As the successor to 2024, it has become the gold standard for damage-tolerant airframe structures in modern aviation. * **Excellent Strength-to-Weight Ratio:** Maintains the high strength characteristic of the 2XXX series while offering vastly improved durability. **Conclusion** Aluminum Alloy 2524 represents a pinnacle of alloy development for damage-tolerant aerospace structures. By focusing on purity and microstructural control, it delivers a step-change improvement in fatigue and toughness performance over its predecessors. Its widespread adoption in flagship aircraft programs like the Boeing 787 underscores its critical role in enabling the lighter, more efficient, and safer aircraft that define modern air travel.

Packing of Standard Packing: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 1639 gallon liquid totes Special package is available on request.