7090 Aluminum alloy,Aluminum 7090 alloy，E FORU

### **7090 Aluminum Alloy: Ultra-High Strength Aluminum Alloy** **7090 Aluminum Alloy** is an ultra-high strength aluminum-zinc-magnesium-copper alloy developed through powder metallurgy processing. This advanced alloy represents a significant breakthrough in aluminum alloy technology, offering exceptional strength levels that surpass conventional wrought aluminum alloys while maintaining good toughness and fatigue resistance. --- #### **1. Chemical Composition** | Element | Content (%) (Typical) | Role in the Alloy | | :--- | :--- | :--- | | **Zinc (Zn)** | 7.3 - 8.7 | Primary strengthening element | | **Magnesium (Mg)** | 2.0 - 3.0 | Enhances strength through precipitation hardening | | **Copper (Cu)** | 0.6 - 1.2 | Improves strength and corrosion resistance | | **Cobalt (Co)** | 0.2 - 0.6 | Forms fine dispersoids for grain structure control | | **Zirconium (Zr)** | 0.05 - 0.15 | Additional grain structure control | | **Iron (Fe)** | ≤ 0.15 | Impurity element | | **Silicon (Si)** | ≤ 0.12 | Impurity element | | **Other Elements** | ≤ 0.05 each; ≤ 0.15 total | - | | **Aluminum (Al)** | Balance | Base metal | --- #### **2. Manufacturing Process** **Powder Metallurgy Route:** - Gas atomization to produce fine alloy powder - Degassing to remove moisture and contaminants - Hot isostatic pressing (HIP) or extrusion for consolidation - Thermomechanical processing - Solution heat treatment and aging **Key Advantages of PM Process:** - Fine, uniform microstructure - Reduced segregation - Enhanced mechanical properties - Ability to incorporate novel alloying elements --- #### **3. Physical Properties** | Property | Value / Description | | :--- | :--- | | **Density** | 2.82 g/cm³ (0.102 lb/in³) | | **Melting Range** | 475°C - 635°C (887°F - 1175°F) | | **Electrical Conductivity** | 35-40% IACS | | **Thermal Conductivity** | 115-135 W/m·K | | **Coefficient of Thermal Expansion** | 23.4 × 10⁻⁶/°C (20-100°C) | | **Modulus of Elasticity** | 72 GPa (10.4 × 10⁶ psi) | --- #### **4. Mechanical Properties (Typical for T7-type Temper)** | Property | Typical Value | | :--- | :--- | | **Tensile Ultimate Strength** | 620 - 690 MPa (90 - 100 ksi) | | **Tensile Yield Strength (0.2% Offset)** | 580 - 650 MPa (84 - 94 ksi) | | **Elongation** | 6-10% | | **Compression Yield Strength** | 570 - 640 MPa (83 - 93 ksi) | | **Shear Strength** | 350 - 390 MPa (51 - 57 ksi) | | **Fatigue Strength** | 190 - 220 MPa (28 - 32 ksi) | | **Fracture Toughness** | 22-28 MPa·√m | --- #### **5. Product Applications** **7090 Aluminum Alloy** is used in the most demanding applications: * **Aerospace Components:** * Aircraft landing gear components * Missile and rocket structures * Space vehicle components * Military aircraft structural parts * **Defense Applications:** * Armor components * Military vehicle parts * Defense system structures * **High-Performance Applications:** * Racing vehicle components * High-stress structural members * Specialized machinery parts * **Sports Equipment:** * High-performance bicycle components * * Competition sports equipment --- #### **6. International Standards** | Standard Body | Designation | Specification | | :--- | :--- | :--- | | **Aluminum Association** | 7090 | AA Teal Sheets | | **ASTM International** | 7090 | ASTM B595 (PM Aluminum Alloys) | | **Aerospace (AMS)** | - | Under development | | **Military Standards** | Various | Material specifications | --- #### **7. Key Characteristics** **Advantages:** - **Ultra-high strength** levels - **Excellent strength-to-weight ratio** - **Good fatigue resistance** - **Fine, uniform microstructure** - **Enhanced thermal stability** - **Good corrosion resistance** for strength level **Limitations:** - **Higher cost** due to PM processing - **Limited product forms** and sizes - **Complex manufacturing process** - **Limited industry experience** compared to conventional alloys - **Challenging machining** operations --- #### **8. Manufacturing Considerations** * **Machining:** Requires specialized tooling and techniques * **Forming:** Limited formability in heat-treated condition * **Joining:** Requires specialized welding and joining methods * **Heat Treatment:** Critical control of time-temperature parameters * **Quality Control:** Extensive non-destructive testing required --- #### **9. Special Features** **7090 Aluminum Alloy** represents advanced material technology: * **Strength Level:** Among the strongest aluminum alloys available * **Microstructure:** Fine-grained, homogeneous structure from PM processing * **Alloy Design:** Optimized composition enabled by powder metallurgy * **Performance:** Excellent combination of strength and damage tolerance **Comparison with Conventional Alloys:** - 15-20% higher strength than 7075-T6 - Better fatigue performance - Improved thermal stability - More consistent properties --- #### **10. Future Developments** * **Process Optimization:** Improving manufacturing efficiency * **Cost Reduction:** Developing more economical production methods * **Application Expansion:** Identifying new application areas * **Standardization:** Establishing industry-wide specifications **7090 Aluminum Alloy** represents the cutting edge of aluminum alloy development, pushing the boundaries of what is possible with aluminum-based materials. While currently limited to specialized applications due to cost and manufacturing complexity, this alloy demonstrates the potential for significant performance improvements through advanced processing techniques and innovative alloy design.

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 2175 gallon liquid totes Special package is available on request.