7099 Aluminum alloy,Aluminum 7099 alloy，E FORU

### **7099 Aluminum Alloy: Advanced High-Strength Powder Metallurgy Alloy** **7099 Aluminum Alloy** is a state-of-the-art ultra-high strength aluminum-zinc-magnesium-copper alloy produced via advanced powder metallurgy (PM) processing. Representing the latest evolution in PM aluminum alloy technology, 7099 offers an unparalleled combination of extreme strength, good damage tolerance, and improved corrosion resistance for the most demanding aerospace and defense applications. --- #### **1. Chemical Composition** | Element | Content (%) (Typical) | Role in the Alloy | | :--- | :--- | :--- | | **Zinc (Zn)** | 9.0 - 10.5 | Primary strengthening element through formation of MgZn₂ precipitates | | **Magnesium (Mg)** | 2.2 - 3.0 | Enhances strength and age-hardening response | | **Copper (Cu)** | 1.2 - 1.9 | Improves strength and stress corrosion cracking resistance | | **Cobalt (Co)** | 0.9 - 1.5 | Forms fine Co-containing dispersoids for superior microstructural control | | **Zirconium (Zr)** | 0.10 - 0.18 | Additional grain structure control and recrystallization inhibition | | **Iron (Fe)** | ≤ 0.10 | Tightly controlled impurity | | **Silicon (Si)** | ≤ 0.08 | Tightly controlled impurity | | **Oxygen (O)** | ≤ 0.15 | Controlled from advanced powder processing | | **Other Elements** | ≤ 0.05 each; ≤ 0.15 total | - | | **Aluminum (Al)** | Balance | Base metal | --- #### **2. Manufacturing Process** **Advanced Powder Metallurgy Route:** - **Ultra-Fine Atomization:** Produces superior quality spherical powder - **Advanced Degassing:** State-of-the-art vacuum processing - **HIP Consolidation:** Hot isostatic pressing for maximum density - **Precision Thermomechanical Processing:** Advanced forging and forming - **Optimized Heat Treatment:** Sophisticated aging treatments **Technological Advantages:** - Extremely fine and uniform microstructure - Minimal oxide content - Superior mechanical properties - Enhanced reproducibility --- #### **3. Physical Properties** | Property | Value / Description | | :--- | :--- | | **Density** | 2.84 g/cm³ (0.103 lb/in³) | | **Melting Range** | 475°C - 635°C (887°F - 1175°F) | | **Electrical Conductivity** | 32-36% IACS | | **Thermal Conductivity** | 105-125 W/m·K | | **Coefficient of Thermal Expansion** | 23.3 × 10⁻⁶/°C (20-100°C) | | **Modulus of Elasticity** | 73 GPa (10.6 × 10⁶ psi) | --- #### **4. Mechanical Properties (Typical for Peak Aged Condition)** | Property | Typical Value | | :--- | :--- | | **Tensile Ultimate Strength** | 690 - 760 MPa (100 - 110 ksi) | | **Tensile Yield Strength (0.2% Offset)** | 650 - 720 MPa (94 - 104 ksi) | | **Elongation** | 4-8% | | **Compression Yield Strength** | 640 - 710 MPa (93 - 103 ksi) | | **Shear Strength** | 390 - 430 MPa (57 - 62 ksi) | | **Fatigue Strength** | 210 - 240 MPa (30 - 35 ksi) | | **Fracture Toughness (K1C)** | 22-28 MPa·√m | --- #### **5. Product Applications** **7099 Aluminum Alloy** is designed for extreme performance applications: * **Aerospace and Defense:** * Next-generation aircraft landing gear * Advanced missile structures * Rocket motor cases and components * Military aircraft critical structures * Advanced armor systems * **Space Applications:** * Next-generation launch vehicle structures * High-performance satellite components * Space exploration vehicle structures * **Specialized Applications:** * Formula 1 and motorsport components * High-performance automotive systems * Advanced industrial equipment --- #### **6. International Standards** | Standard Body | Designation | Specification | | :--- | :--- | :--- | | **Aluminum Association** | 7099 | AA Teal Sheets | | **ASTM International** | 7099 | ASTM B595 | | **Aerospace (AMS)** | - | In development for specialized applications | | **Military Standards** | Various | Classified and specialized specifications | --- #### **7. Key Characteristics** **Advantages:** - **Extreme strength** capabilities - **Outstanding strength-to-weight ratio** - **Good fracture toughness** for ultra-high strength level - **Enhanced stress corrosion cracking resistance** - **Superior microstructural homogeneity** - **Excellent fatigue performance** - **Advanced thermal stability** **Limitations:** - **Very high manufacturing cost** - **Limited availability and product forms** - **Highly complex processing requirements** - **Extremely challenging machining** - **Limited industrial application history** --- #### **8. Manufacturing Considerations** * **Machining:** Requires advanced tooling and specialized techniques * **Forming:** Restricted to specialized near-net shape processes * **Joining:** Demands advanced joining technologies * **Heat Treatment:** Critical precision control required * **Quality Assurance:** Extensive advanced NDT essential --- #### **9. Special Features** **7099 Aluminum Alloy** represents cutting-edge technology: * **Microstructural Excellence:** Ultra-fine, homogeneous structure * **Alloy Design Innovation:** Advanced composition optimization * **Property Breakthroughs:** Unprecedented strength-toughness balance * **Manufacturing Leadership:** State-of-the-art PM processing **Performance Comparison:** - 25-30% higher strength than 7075-T6 - Superior corrosion resistance for strength level - Enhanced damage tolerance capabilities - Exceptional property consistency --- #### **10. Technical Development Status** * **Research Focus:** Ongoing performance optimization * **Manufacturing Innovation:** Advanced processing development * **Application Qualification:** Limited specialized applications * **Future Potential:** Significant growth opportunities **7099 Aluminum Alloy** represents the pinnacle of aluminum alloy development, pushing the boundaries of achievable mechanical properties through advanced powder metallurgy technology. While currently limited to highly specialized applications due to extreme manufacturing requirements and costs, this alloy demonstrates the future potential of aluminum-based materials for applications where maximum performance justifies premium costs. The continued development of 7099 and similar advanced PM aluminum alloys is expected to enable new capabilities in aerospace, defense, and high-performance applications where conventional materials reach their performance limits.

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 2178 gallon liquid totes Special package is available on request.