8090-T3 Aluminum alloy,Aluminum 8090-T3 alloy，E FORU

### **Aluminum 8090-T3 Alloy Technical Datasheet** --- #### **1. Product Overview** **Aluminum 8090-T3** is a advanced aluminum-lithium alloy from the 8000 series, specifically developed for aerospace applications requiring superior strength-to-weight ratio and excellent stiffness. The T3 temper indicates that the material has been solution heat-treated, cold worked, and naturally aged to a substantially stable condition. This alloy represents the third generation of Al-Li alloys, offering significant weight savings compared to conventional aluminum alloys while maintaining excellent mechanical properties. --- #### **2. Chemical Composition (Weight %)** | Element | Composition Range | Typical Value | |---------|-------------------|---------------| | Aluminum (Al) | Balance | ≥95.8% | | Lithium (Li) | 2.2 - 2.7% | 2.45% | | Copper (Cu) | 1.0 - 1.6% | 1.3% | | Magnesium (Mg) | 0.6 - 1.3% | 0.95% | | Zirconium (Zr) | 0.08 - 0.15% | 0.12% | | Iron (Fe) | ≤ 0.15% | 0.10% | | Silicon (Si) | ≤ 0.10% | 0.06% | | Zinc (Zn) | ≤ 0.10% | 0.06% | | Manganese (Mn) | ≤ 0.05% | 0.03% | | Other Elements (each) | ≤ 0.05% | - | | Total Other Elements | ≤ 0.15% | - | **Key Composition Features:** - Lithium addition for density reduction and stiffness improvement - Copper and magnesium for precipitation strengthening - Zirconium for grain structure control and recrystallization inhibition - Ultra-low iron and silicon for enhanced toughness - Specifically designed for aerospace applications --- #### **3. Physical Properties** | Property | Metric Value | Imperial Value | |----------|--------------|----------------| | Density | 2.54 g/cm³ | 0.092 lb/in³ | | Melting Range | 600-655°C | 1112-1211°F | | Thermal Conductivity | 85-95 W/m·K | - | | Electrical Conductivity | 18-22% IACS | - | | Modulus of Elasticity | 78 GPa | 11.3 × 10⁶ psi | | Coefficient of Thermal Expansion | 22.5 × 10⁻⁶/°C | 12.5 × 10⁻⁶/°F | | Specific Heat Capacity | 920 J/kg·K | - | | Electrical Resistivity | 78-95 nΩ·m | - | --- #### **4. Mechanical Properties (T3 Temper)** **Typical Mechanical Properties:** - **Tensile Ultimate Strength**: 420-480 MPa (61-70 ksi) - **Tensile Yield Strength (0.2% Offset)**: 280-340 MPa (41-49 ksi) - **Elongation in 50 mm**: 10-14% - **Shear Strength**: 250-290 MPa (36-42 ksi) - **Hardness (Vickers)**: 130-150 HV - **Fatigue Strength**: 160-190 MPa (23-28 ksi) - **Compressive Yield Strength**: 270-330 MPa (39-48 ksi) - **Fracture Toughness (K Ic)**: 28-32 MPa√m **T3 Temper Specific Characteristics:** - **Solution Heat Treated** and cold worked - **Naturally Aged** to substantially stable condition - **Good Damage Tolerance** - **Excellent Strength-to-Weight Ratio** - **Superior Stiffness** compared to conventional alloys --- #### **5. International Standards** **Primary Specifications:** - **AMS 4250**: Aluminum Alloy 8090 Plate and Sheet - **EN 573-3**: Aluminum and aluminum alloys - Chemical composition - **ISO 209**: Wrought aluminum and aluminum alloys **Aerospace Standards:** - **ASTM B909**: Standard Guide for Aluminum Lithium Alloys - **MIL-HDBK-5**: Metallic Materials and Elements for Aerospace Vehicle Structures - **ABD**: Airbus Technical Specifications **Temper Standards:** - **EN 515**: Aluminum and aluminum alloys - Temper designations - **ASTM B296**: Standard Practice for Temper Designations - **ISO 2107**: Aluminum temper designations --- #### **6. Product Applications** **Aerospace Structures:** - Aircraft fuselage skins - Wing and empennage components - Spacecraft structures - Helicopter structural parts - Military aircraft components **Aerospace Components:** - Bulkheads and frames - Stringers and longerons - Access doors and panels - Floor beams and supports - Structural brackets **Defense Applications:** - Missile structures - Military vehicle components - Defense system structures - Armored vehicle parts - Military aircraft upgrades **Special Applications:** - Space launch vehicle components - Satellite structures - High-performance sporting equipment - Racing vehicle components - Specialized engineering structures --- #### **7. Key Characteristics** **T3 Temper Advantages:** - **Excellent Strength-to-Weight Ratio** - **Superior Stiffness** - **Good Damage Tolerance** - **Excellent Fatigue Performance** - **Good Corrosion Resistance** - **Weight Savings** up to 10% vs conventional alloys **Aerospace Benefits:** - Reduced density with lithium addition - Improved specific modulus - Good weldability and joinability - Compatible with aerospace manufacturing - Proven performance in service --- #### **8. Processing Characteristics** **Forming Operations:** - **Good Bendability** with proper techniques - **Adequate Stretch Forming** capability - **Limited Deep Drawing** without annealing - **Requires Specialized Tooling** - **Controlled Springback** characteristics **Machining:** - Good machinability rating: 45% - Requires sharp carbide tooling - Recommended cutting speed: 100-220 m/min - Adequate surface finish achievable - Special techniques for optimal results **Joining Methods:** - **Good Weldability** - primarily friction stir welding - **Excellent Adhesive Bonding** - **Mechanical Fastening** - good performance - **Limited Conventional Welding** capability - **Specialized Joining Techniques** required --- #### **9. Corrosion Resistance** **Performance Characteristics:** - **Atmospheric Corrosion**: Good resistance - **Stress Corrosion Cracking**: Good resistance in T3 temper - **Exfoliation Corrosion**: Moderate resistance - **Galvanic Corrosion**: Requires proper isolation - **Overall Performance**: Adequate for aerospace applications **Protection Methods:** - Alclad versions available - Chemical conversion coatings - Primer and paint systems - Proper design for corrosion prevention - Regular inspection and maintenance --- #### **10. Heat Treatment & Aging** **T3 Temper Process:** - Solution heat treatment: 530-540°C (986-1004°F) - Rapid quenching - Cold working (typically 1-5% stretch) - Natural aging to substantially stable condition **Aging Characteristics:** - Natural aging period: 4-30 days - Stable mechanical properties after aging - No artificial aging required for T3 temper - Good stability at room temperature --- #### **11. Quality Assurance** **Specialized Testing:** - Chemical composition verification - Mechanical property testing - Fracture toughness testing - Fatigue testing - Corrosion resistance evaluation - Non-destructive testing **Certification:** - Aerospace quality certification - Mill test certificates with full traceability - Nadcap accreditation for special processes - Customer-specific quality requirements - Regular audits and compliance verification --- #### **12. Comparison with Conventional Alloys** | Property | 8090-T3 | 2024-T3 | 7075-T6 | |----------|----------|----------|----------| | Density (g/cm³) | 2.54 | 2.78 | 2.81 | | Tensile Strength (MPa) | 420-480 | 420-470 | 510-560 | | Elastic Modulus (GPa) | 78 | 73 | 72 | | Specific Strength | Excellent | Good | Very Good | | Typical Applications | Aerospace | Aircraft structures | High-strength applications | --- #### **Conclusion** Aluminum 8090-T3 alloy represents a significant advancement in aerospace materials technology, offering exceptional strength-to-weight ratio and superior stiffness through its lithium-containing composition. The T3 temper provides a good combination of strength, damage tolerance, and manufacturing characteristics suitable for various aerospace applications. While requiring specialized processing techniques and careful handling due to its lithium content, the weight savings and performance benefits make it an attractive choice for aircraft and spacecraft structures where weight reduction is critical. The alloy's proven performance in aerospace applications, combined with its excellent mechanical properties and damage tolerance characteristics, has established 8090-T3 as a valuable material solution for modern aerospace engineering requirements. Continued development and application of this advanced aluminum-lithium alloy demonstrate the ongoing pursuit of lighter, stronger, and more efficient materials for the aerospace industry.

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 2256 gallon liquid totes Special package is available on request.