7028 Aluminum alloy,Aluminum 7028 alloy，E FORU

### **Aluminum 7028 Alloy (EN AW-7028) - Product Introduction** **Aluminum 7028** is a high-strength, heat-treatable aluminum-zinc-magnesium-copper alloy specifically designed for applications requiring exceptional strength combined with good toughness and corrosion resistance. This advanced 7xxx series alloy offers superior mechanical properties, making it suitable for demanding aerospace, defense, and high-performance structural applications. --- #### **1. Chemical Composition** The chemical composition is carefully balanced for optimal performance: | Element | Content (%) (Typical) | Standard Range | |---|---|---| | **Aluminum (Al)** | Balance | Balance | | **Zinc (Zn)** | 6.0 - 7.0 | 6.0 - 7.0 | | **Magnesium (Mg)** | 2.4 - 3.1 | 2.4 - 3.1 | | **Copper (Cu)** | 1.3 - 1.9 | 1.3 - 1.9 | | **Zirconium (Zr)** | 0.10 - 0.18 | 0.10 - 0.18 | | **Manganese (Mn)** | 0.05 - 0.15 | 0.05 - 0.15 | | **Chromium (Cr)** | 0.08 - 0.16 | 0.08 - 0.16 | | **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 7028 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** | 33-37 % IACS (T6 Temper) | 33-37 % 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 | 510-560 | 8-12 | 155-165 | | **T651** | 590-640 | 520-570 | 7-11 | 158-168 | | **T7351** | 540-590 | 470-520 | 9-13 | 145-155 | | **T7651** | 560-610 | 490-540 | 8-12 | 150-160 | --- #### **4. International Standards** Aluminum 7028 complies with the following international standards: * **EN:** **EN AW-7028** (3.4336) * **ASTM:** **ASTM B209**, **ASTM B247** * **ISO:** **AlZn7MgCu** under ISO 209 * **AMS:** **AMS 4118** (Aerospace Material Specification) * **UNS:** **A97028** * **MIL:** **MIL-A-22771** --- #### **5. Product Applications** Aluminum 7028 is used in the most demanding applications: * **Aircraft Structures:** Primary aircraft structures, wing components * **Military Aerospace:** Fighter aircraft components, military transport structures * **Space Systems:** Satellite structures, rocket components * **Defense Equipment:** Missile bodies, armored vehicle components * **High-Performance Automotive:** Racing chassis and suspension systems * **Marine Defense:** Naval vessel components, submarine structures * **Industrial Machinery:** High-stress machinery components * **Sports Equipment:** Professional competition equipment --- #### **6. Key Advantages & Characteristics** * **Ultra-High Strength:** Exceptional mechanical properties approaching 640 MPa tensile strength * **Superior Toughness:** Excellent fracture toughness characteristics * **Enhanced Corrosion Resistance:** Improved stress corrosion cracking resistance * **Excellent Fatigue Performance:** Superior resistance to cyclic loading * **Damage Tolerance:** Outstanding resistance to crack propagation * **Thermal Stability:** Maintains properties at elevated temperatures * **Cryogenic Capability:** Good performance at low temperatures * **Weight Efficiency:** Premium strength-to-weight ratio **Heat Treatment Characteristics:** - Solution treatment: 465-475°C (870-885°F) - Complex aging treatments for optimized properties - T74-type tempers provide excellent SCC resistance - T76 temper offers balanced strength and corrosion resistance **Corrosion Performance:** - Excellent stress corrosion cracking resistance - Good exfoliation corrosion resistance - Suitable for severe environmental conditions - Maintains integrity in corrosive atmospheres **Manufacturing Characteristics:** - Good forgeability within specified temperature ranges - Suitable for complex structural components - Requires specialized machining techniques - Can be joined using advanced 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 carbide tooling for machining - Implement strict heat treatment controls - Follow specialized welding procedures - Apply appropriate corrosion protection - Maintain clean processing environments --- **Conclusion:** Aluminum 7028 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 critical aerospace, defense, and high-performance applications. While requiring careful processing and specialized manufacturing techniques, 7028 delivers unparalleled performance that justifies its use in 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 2123 gallon liquid totes Special package is available on request.