5024-H116 Al-Scandium Aluminum alloy,Aluminum 5024-H116 Al-Scandium alloy,E FORU

### **5024-H116 Al-Scandium Aluminum Alloy - Product Datasheet** **Overview** 5024 Aluminum Alloy is a high-performance, non-heat-treatable aluminum-magnesium alloy strategically enhanced with a small percentage of **Scandium (Sc)**. The **-H116** temper specifically denotes a strain-hardened state for marine service, offering enhanced resistance to exfoliation corrosion. This alloy represents a significant advancement over conventional 5xxx series alloys, providing an exceptional combination of **high strength, excellent weldability, and superior corrosion resistance**, making it a premium choice for demanding aerospace, marine, and high-performance applications. The addition of Scandium forms fine, coherent Al₃Sc precipitates that inhibit recrystallization and grain growth, leading to a finer grain structure both in the base metal and in the heat-affected zone (HAZ) of welds. This results in higher strength and more durable welded joints. --- #### **1. Chemical Composition (Weight %)** The composition is tightly controlled to achieve optimal performance, particularly the Scandium content. | Element | Min (%) | Max (%) | | :--- | :--- | :--- | | **Silicon (Si)** | - | 0.40 | | **Iron (Fe)** | - | 0.40 | | **Copper (Cu)** | - | 0.10 | | **Manganese (Mn)** | 0.50 | 1.0 | | **Magnesium (Mg)** | 3.8 | 4.5 | | **Chromium (Cr)** | 0.05 | 0.25 | | **Zinc (Zn)** | - | 0.20 | | **Scandium (Sc)** | 0.05 | 0.25 | | **Zirconium (Zr)** | 0.05 | 0.15 | | **Titanium (Ti)** | - | 0.15 | | **Other Elements (Each)** | - | 0.05 | | **Other Elements (Total)** | - | 0.15 | | **Aluminum (Al)** | Balance | Balance | *Note: The specific Scandium content is a critical differentiator and is optimized for the desired strength-to-cost ratio.* --- #### **2. Physical Properties** | Property | Value / Description | | :--- | :--- | | **Density** | ≈ 2.66 g/cm³ (0.096 lb/in³) | | **Melting Range** | ≈ 570 - 640 °C (1058 - 1184 °F) | | **Electrical Conductivity** | ≈ 30-35% IACS (International Annealed Copper Standard) | | **Thermal Conductivity** | ≈ 120 W/m·K | | **Coefficient of Thermal Expansion** | ≈ 23.8 x 10⁻⁶/°C (20-100°C) | | **Modulus of Elasticity** | ≈ 70 GPa (10,200 ksi) | --- #### **3. Mechanical Properties (Typical for -H116 Temper)** The -H116 temper provides a optimal blend of strength and corrosion resistance for marine structures. | Property | Typical Value | | :--- | :--- | | **Tensile Strength (Ultimate)** | 350 - 420 MPa (51 - 61 ksi) | | **Yield Strength (0.2% Offset)** | 220 - 280 MPa (32 - 41 ksi) | | **Elongation (% in 50mm)** | ≥ 12 % | | **Hardness (Brinell)** | ≈ 80 - 100 HB | --- #### **4. Key Characteristics & Advantages** * **Superior Strength:** The Scandium addition provides a significant strength increase (up to 50% higher yield strength than 5083-H116) through precipitation strengthening and grain refinement. * **Exceptional Weldability:** Retains a high proportion of its strength in the welded condition. The fine Al₃Sc precipitates prevent grain coarsening in the Heat-Affected Zone (HAZ), resulting in welded joints with strength and ductility far superior to other 5xxx alloys. * **Enhanced Corrosion Resistance:** Offers excellent resistance to seawater, stress corrosion cracking (SCC), and exfoliation corrosion. The -H116 temper is specifically qualified for this purpose. * **Good Formability:** Can be formed using standard techniques, though its higher strength may require more force than non-Scandium grades. * **Recrystallization Resistance:** The Al₃Sc particles stabilize the microstructure against grain growth during welding or exposure to high temperatures. * **Lightweight:** Maintains the low density inherent to aluminum alloys, contributing to weight savings in critical applications. --- #### **5. Product Applications** This alloy is specified for the most demanding applications where weight, strength, and weld integrity are paramount. * **Aerospace & Defense:** Fuselage skins, wing structures, space launch vehicle fuel tanks, military aircraft components, and unmanned aerial vehicles (UAVs). * **High-Performance Marine:** High-speed boat hulls, ship superstructures, decks, masts, and other critical components where weight savings and seawater corrosion resistance are vital. * **Transportation:** Structural components for lightweight railway cars and specialized military vehicles. * **Sporting Goods:** High-end bicycle frames, baseball bats, and mountain climbing equipment where strength-to-weight ratio is critical. --- #### **6. International Standards** 5024-H116 is recognized under several key international standards. The designation for the Scandium-containing version is often grouped under specific standards. | Standard Organization | Standard Designation | Title / Note | | :--- | :--- | :--- | | **ASTM (USA)** | **ASTM B928/B928M** | Standard Specification for High Magnesium Aluminum-Alloy Sheet and Plate for Marine Service. 5024 falls under this specification. | | **ASTM (USA)** | **ASTM B209** | Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate. | | **AA (Aluminum Association)** | **5024** | The unique alloy designation is registered with the Aluminum Association. | | **EN (European Norm)** | **EN AW-5024** (EN 573-3) | The "AW" stands for "Aluminum Wrought". | | **ISO** | **ISO 2107** | For temper designations. The H116 temper is defined here. | **Disclaimer:** The information provided is for reference purposes. Material properties can vary based on the manufacturing process, exact chemical composition, and product form. For design and critical applications, always consult the official material datasheet from the supplier and the complete relevant international standard.

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 1790 gallon liquid totes Special package is available on request.