7041 Aluminum alloy,Aluminum 7041 alloy，E FORU

### **Aluminum 7041 Alloy (EN AW-7041) - Product Introduction** **Aluminum 7041** is a high-strength, heat-treatable aluminum-zinc-magnesium-copper alloy specifically designed for aerospace applications requiring an excellent combination of strength, damage tolerance, and corrosion resistance. This advanced 7xxx series alloy offers improved performance characteristics for critical structural components in aircraft and defense applications. --- #### **1. Chemical Composition** The chemical composition is optimized for balanced performance: | Element | Content (%) (Typical) | Standard Range | |---|---|---| | **Aluminum (Al)** | Balance | Balance | | **Zinc (Zn)** | 6.0 - 7.0 | 6.0 - 7.0 | | **Magnesium (Mg)** | 2.0 - 2.8 | 2.0 - 2.8 | | **Copper (Cu)** | 1.5 - 2.2 | 1.5 - 2.2 | | **Zirconium (Zr)** | 0.10 - 0.18 | 0.10 - 0.18 | | **Manganese (Mn)** | ≤ 0.10 | ≤ 0.10 | | **Chromium (Cr)** | ≤ 0.04 | ≤ 0.04 | | **Iron (Fe)** | ≤ 0.15 | ≤ 0.15 | | **Silicon (Si)** | ≤ 0.12 | ≤ 0.12 | | **Titanium (Ti)** | ≤ 0.06 | ≤ 0.06 | | **Others (Each)** | ≤ 0.05 | ≤ 0.05 | | **Others (Total)** | ≤ 0.15 | ≤ 0.15 | --- #### **2. Physical Properties** Aluminum 7041 exhibits excellent physical properties: | Property | Metric Value | Imperial Value | |---|---|---| | **Density** | 2.82 g/cm³ | 0.102 lb/in³ | | **Melting Range** | 475 - 635 °C | 887 - 1175 °F | | **Electrical Conductivity** | 36-40 % IACS (T7451 Temper) | 36-40 % IACS | | **Thermal Conductivity** | 140-155 W/m·K | 970-1075 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) | |---|---|---|---|---| | **T7451** | 530-580 | 460-510 | 10-14 | 145-155 | | **T7651** | 550-600 | 480-530 | 9-13 | 150-160 | | **T7351** | 510-560 | 440-490 | 11-15 | 140-150 | --- #### **4. International Standards** Aluminum 7041 complies with the following international standards: * **AMS:** **AMS 4105**, **AMS 4331** (Aerospace Material Specification) * **ASTM:** **ASTM B209**, **ASTM B247** * **EN:** **EN AW-7041** (3.4146) * **ISO:** **AlZn6MgCu** under ISO 209 * **UNS:** **A97041** --- #### **5. Product Applications** Aluminum 7041 is used in demanding aerospace applications: * **Aircraft Structures:** Wing upper surfaces, fuselage frames, bulkheads * **Military Aircraft:** Fighter aircraft primary structures * **Helicopter Components:** Main rotor components, structural frames * **Spacecraft:** Satellite structural components, launch vehicle parts * **Commercial Aviation:** Primary airframe structures * **Defense Systems:** Missile components, military vehicle structures * **High-Performance Automotive:** Racing and performance vehicle components * **Marine Applications:** High-performance boat structures --- #### **6. Key Advantages & Characteristics** * **High Strength-to-Weight Ratio:** Excellent mechanical properties with low density * **Superior Damage Tolerance:** Enhanced fracture toughness characteristics * **Good Stress Corrosion Resistance:** Balanced SCC resistance for high-strength applications * **Excellent Fatigue Performance:** Superior resistance to cyclic loading * **Good Exfoliation Corrosion Resistance:** Improved corrosion performance * **Heat Treatable:** Excellent response to complex aging treatments * **Weldability:** Suitable for advanced joining techniques * **Thermal Stability:** Maintains properties at elevated temperatures **Heat Treatment Characteristics:** - Solution treatment: 465-475°C (870-885°F) - T74-type tempers provide optimal property balance - T76 temper for improved corrosion resistance - Controlled aging sequences for consistent properties **Corrosion Performance:** - Good stress corrosion cracking resistance - Adequate exfoliation corrosion resistance - Suitable for aerospace environments - Can be used with protective coatings **Manufacturing Characteristics:** - Good machinability in heat-treated condition - Suitable for complex structural shapes - Can be joined using modern welding techniques - Good for precision manufacturing operations --- **Quality Assurance:** - Stringent chemical composition controls - Comprehensive mechanical testing - Advanced non-destructive evaluation - Full material traceability - Certification to aerospace standards **Processing Recommendations:** - Use carbide tooling for machining operations - Follow recommended heat treatment cycles - Implement proper quality control measures - Use appropriate welding techniques - Maintain clean processing environment --- **Conclusion:** Aluminum 7041 represents an advanced high-strength aluminum alloy offering an excellent balance of mechanical properties, damage tolerance, and corrosion resistance for aerospace applications. Its optimized composition and heat treatment response make it particularly valuable for critical aircraft structures where reliability and performance are essential. The alloy's ability to deliver consistent performance under demanding conditions, combined with its good processing characteristics, establishes it as a reliable choice for engineers and designers working on advanced aerospace applications. For projects requiring high strength with good overall performance characteristics, Aluminum 7041 provides an excellent combination of properties and processing capabilities.

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 2138 gallon liquid totes Special package is available on request.