7042 Aluminum alloy,Aluminum 7042 alloy，E FORU

### **Aluminum 7042 Alloy (EN AW-7042) - Product Introduction** **Aluminum 7042** is a high-strength, heat-treatable aluminum-zinc-magnesium-copper alloy specifically developed for aerospace and defense applications requiring an optimal balance of strength, toughness, and corrosion resistance. This advanced 7xxx series alloy offers superior mechanical properties and enhanced durability for critical structural components. --- #### **1. Chemical Composition** The chemical composition is carefully balanced for high performance: | Element | Content (%) (Typical) | Standard Range | |---|---|---| | **Aluminum (Al)** | Balance | Balance | | **Zinc (Zn)** | 5.8 - 6.8 | 5.8 - 6.8 | | **Magnesium (Mg)** | 2.2 - 2.9 | 2.2 - 2.9 | | **Copper (Cu)** | 1.4 - 2.0 | 1.4 - 2.0 | | **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 7042 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** | 35-39 % IACS (T7451 Temper) | 35-39 % IACS | | **Thermal Conductivity** | 138-153 W/m·K | 955-1060 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** | 540-590 | 470-520 | 10-14 | 148-158 | | **T7651** | 560-610 | 490-540 | 9-13 | 153-163 | | **T7351** | 520-570 | 450-500 | 11-15 | 143-153 | --- #### **4. International Standards** Aluminum 7042 complies with the following international standards: * **AMS:** **AMS 4106** (Aerospace Material Specification) * **ASTM:** **ASTM B209**, **ASTM B247** * **EN:** **EN AW-7042** (3.4147) * **ISO:** **AlZn6MgCu** under ISO 209 * **UNS:** **A97042** --- #### **5. Product Applications** Aluminum 7042 is used in critical aerospace and defense applications: * **Aircraft Structures:** Wing spars, fuselage frames, bulkheads * **Military Aircraft:** Combat aircraft primary structures * **Helicopter Components:** Rotor systems, transmission supports * **Spacecraft:** Satellite frames, launch vehicle structures * **Defense Systems:** Missile components, armored vehicle structures * **Commercial Aviation:** Primary airframe components * **Marine Applications:** High-performance marine structures * **Racing Components:** High-performance automotive and motorcycle frames --- #### **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 demanding applications * **Excellent Fatigue Performance:** Superior resistance to cyclic loading * **Enhanced Toughness:** Improved fracture resistance * **Heat Treatable:** Excellent response to artificial aging treatments * **Good Machinability:** Suitable for precision manufacturing * **Weldability:** Can be joined using advanced techniques **Heat Treatment Characteristics:** - Solution treatment: 465-475°C (870-885°F) - T74-type tempers for optimal property balance - Controlled aging for consistent properties - Good response to overaging treatments **Corrosion Performance:** - Good stress corrosion cracking resistance - Adequate exfoliation corrosion resistance - Suitable for aerospace environments - Can be enhanced with protective systems **Manufacturing Characteristics:** - Good forgeability and machinability - Suitable for complex structural components - Can be processed using modern techniques - Good dimensional stability --- **Quality Assurance:** - Stringent chemical composition controls - Comprehensive mechanical testing - Advanced non-destructive evaluation - Full material traceability - Certification to aerospace standards **Processing Recommendations:** - Use premium tooling for machining operations - Follow established heat treatment procedures - Implement strict quality control measures - Use appropriate joining techniques - Maintain controlled processing environment --- **Conclusion:** Aluminum 7042 represents an advanced high-strength aluminum alloy offering an excellent combination of mechanical properties and durability for demanding aerospace and defense applications. Its optimized composition and reliable performance characteristics make it particularly valuable for critical structural components where both strength and damage tolerance are essential requirements. The alloy's consistent performance under demanding conditions, combined with its good manufacturing characteristics, establishes it as a preferred material for advanced engineering applications requiring high reliability and performance.

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 2139 gallon liquid totes Special package is available on request.