7009 Aluminum alloy,Aluminum 7009 alloy，E FORU

### **Aluminum 7009 Alloy (EN AW-7009) - Product Introduction** **Aluminum 7009** is a high-strength, heat-treatable aluminum-zinc-magnesium alloy specifically developed for applications requiring excellent strength, good toughness, and superior stress corrosion resistance. As part of the 7xxx series aluminum alloys, it offers an optimal balance of mechanical properties and environmental durability, making it particularly suitable for aerospace and defense applications. --- #### **1. Chemical Composition** The chemical composition is carefully balanced for high strength and corrosion resistance: | Element | Content (%) (Typical) | Standard Range | |---|---|---| | **Aluminum (Al)** | Balance | Balance | | **Zinc (Zn)** | 5.8 - 6.8 | 5.8 - 6.8 | | **Magnesium (Mg)** | 2.0 - 2.8 | 2.0 - 2.8 | | **Copper (Cu)** | 0.8 - 1.4 | 0.8 - 1.4 | | **Zirconium (Zr)** | 0.10 - 0.18 | 0.10 - 0.18 | | **Chromium (Cr)** | 0.12 - 0.20 | 0.12 - 0.20 | | **Manganese (Mn)** | 0.10 - 0.20 | 0.10 - 0.20 | | **Iron (Fe)** | ≤ 0.15 | ≤ 0.15 | | **Silicon (Si)** | ≤ 0.12 | ≤ 0.12 | | **Titanium (Ti)** | ≤ 0.05 | ≤ 0.05 | | **Others (Each)** | ≤ 0.05 | ≤ 0.05 | | **Others (Total)** | ≤ 0.15 | ≤ 0.15 | --- #### **2. Physical Properties** Aluminum 7009 exhibits excellent physical properties for high-performance applications: | Property | Metric Value | Imperial Value | |---|---|---| | **Density** | 2.82 g/cm³ | 0.102 lb/in³ | | **Melting Range** | 475 - 635 °C | 887 - 1175 °F | | **Electrical Conductivity** | 35-39 % IACS (T6 Temper) | 35-39 % IACS | | **Thermal Conductivity** | 135-150 W/m·K | 935-1040 BTU·in/(hr·ft²·°F) | | **Coefficient of Thermal Expansion** | 23.6 × 10⁻⁶/K | 13.1 × 10⁻⁶/°F | | **Modulus of Elasticity** | 71 GPa | 10,300 ksi | | **Shear Modulus** | 27 GPa | 3,920 ksi | --- #### **3. Mechanical Properties** Typical mechanical properties for common tempers: | Temper | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) | |---|---|---|---|---| | **T6** | 580-630 | 520-570 | 9-13 | 150-160 | | **T73** | 530-580 | 470-520 | 11-15 | 140-150 | | **T76** | 550-600 | 490-540 | 10-14 | 145-155 | | **T7451** | 540-590 | 480-530 | 10-14 | 142-152 | --- #### **4. International Standards** Aluminum 7009 complies with the following international standards: * **AMS:** **AMS 4334** (Aerospace Material Specification) * **ASTM:** **ASTM B247** for Aluminum-Alloy Die Forgings * **UNS:** **A97009** * **ISO:** **AlZn6MgCu** under ISO 209 * **EN:** **EN AW-7009** (European Standard Equivalent) * **MIL:** **MIL-A-22771** (Military Specification) --- #### **5. Product Applications** Aluminum 7009 is specified for the most demanding high-performance applications: * **Aerospace Structures:** Aircraft landing gear components, wing structures * **Military Aircraft:** Fighter aircraft components, military helicopter parts * **Defense Systems:** Missile components, armor plating, military vehicles * **Space Applications:** Satellite components, rocket motor cases * **High-Performance Automotive:** Racing vehicle chassis and suspension * **Marine Defense:** Naval vessel components, submarine parts * **Industrial Equipment:** High-stress machinery components * **Sporting Goods:** Premium bicycle frames, high-performance equipment --- #### **6. Key Advantages & Characteristics** * **Ultra-High Strength:** Exceptional mechanical properties with tensile strength exceeding 600 MPa * **Excellent Toughness:** Superior fracture toughness characteristics * **Stress Corrosion Resistance:** Outstanding resistance to stress corrosion cracking * **Fatigue Performance:** Excellent resistance to cyclic loading conditions * **Damage Tolerance:** Superior resistance to crack propagation * **Heat Treatable:** Excellent response to complex aging treatments * **Cryogenic Properties:** Maintains good properties at low temperatures * **Thermal Stability:** Good performance at elevated temperatures **Heat Treatment Characteristics:** - Solution treatment temperature: 465-475°C (870-885°F) - Complex aging treatments for optimized properties - T73 temper provides excellent SCC resistance - T76 temper offers balanced strength and corrosion resistance **Corrosion Performance:** - Excellent resistance to stress corrosion cracking - Good exfoliation corrosion resistance - Suitable for severe environmental conditions - Maintains properties in corrosive atmospheres **Manufacturing Characteristics:** - Good forgeability within proper temperature ranges - Suitable for complex forging operations - Requires specialized machining techniques - Can be joined using appropriate welding methods --- **Quality Assurance:** - Stringent chemical composition controls - Comprehensive mechanical property testing - Advanced non-destructive evaluation - Full traceability and certification - Regular quality audits and verification **Processing Recommendations:** - Use premium cutting tools for machining operations - Implement strict heat treatment controls - Follow recommended welding procedures - Apply proper corrosion protection when needed - Maintain clean processing environments --- **Conclusion:** Aluminum 7009 represents the pinnacle of aluminum alloy technology, offering an exceptional combination of ultra-high strength, superior toughness, and excellent corrosion resistance. Its advanced composition and optimized heat treatment capabilities make it the material of choice for the most demanding aerospace, defense, and high-performance applications. While requiring careful processing and specialized manufacturing techniques, 7009 delivers unparalleled performance that justifies its use in critical applications where failure is not an option. The alloy's ability to maintain excellent properties in severe environments, combined with its outstanding mechanical characteristics, positions it as a premium material for applications where performance and reliability are paramount.

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 2105 gallon liquid totes Special package is available on request.