8090-T511 and 8090-T6511 Aluminum alloy,Aluminum 8090-T511 and 8090-T6511 alloy，E FORU

### **Aluminum 8090-T511 and 8090-T6511 Alloy Technical Datasheet** --- #### **1. Product Overview** **Aluminum 8090-T511 and 8090-T6511** are advanced aluminum-lithium alloys supplied in specific tempers for extruded products. These third-generation Al-Li alloys offer superior strength-to-weight ratio, excellent stiffness, and improved corrosion resistance compared to conventional aluminum alloys. The T511 and T6511 tempers indicate specific thermal-mechanical processing conditions optimized for extruded products, providing enhanced mechanical properties and dimensional stability for aerospace and high-performance applications. --- #### **2. Chemical Composition (Weight %)** | Element | Composition Range | Typical Value | |---------|-------------------|---------------| | Aluminum (Al) | Balance | ≥95.7% | | 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 8% density reduction and 10% stiffness improvement - Copper and magnesium for precipitation strengthening through δ' (Al3Li) and S' (Al2CuMg) phases - Zirconium for grain structure control and recrystallization inhibition - Ultra-low iron and silicon for enhanced toughness and corrosion resistance - Specifically optimized for extrusion processing --- #### **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** **8090-T511 Temper (Solution Heat Treated and Stress Relieved by Stretching):** - **Tensile Ultimate Strength**: 380-440 MPa (55-64 ksi) - **Tensile Yield Strength (0.2% Offset)**: 240-300 MPa (35-44 ksi) - **Elongation in 50 mm**: 12-16% - **Shear Strength**: 230-270 MPa (33-39 ksi) - **Hardness (Vickers)**: 115-135 HV - **Fatigue Strength**: 140-170 MPa (20-25 ksi) **8090-T6511 Temper (Solution Heat Treated, Stress Relieved by Stretching, and Artificially Aged):** - **Tensile Ultimate Strength**: 460-520 MPa (67-75 ksi) - **Tensile Yield Strength (0.2% Offset)**: 360-420 MPa (52-61 ksi) - **Elongation in 50 mm**: 8-12% - **Shear Strength**: 270-310 MPa (39-45 ksi) - **Hardness (Vickers)**: 145-165 HV - **Fatigue Strength**: 170-200 MPa (25-29 ksi) - **Fracture Toughness (K Ic)**: 26-30 MPa√m --- #### **5. International Standards** **Primary Specifications:** - **AMS 4251**: Aluminum Alloy 8090 Extrusions - **EN 573-3**: Aluminum and aluminum alloys - Chemical composition - **ISO 209**: Wrought aluminum and aluminum alloys **Aerospace Standards:** - **ASTM B221**: Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes - **MIL-HDBK-5**: Metallic Materials and Elements for Aerospace Vehicle Structures - **ABD**: Airbus Technical Specifications - **BMS**: Boeing Material 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 Extrusions:** - Aircraft stringers and longerons - Fuselage frames and bulkheads - Wing spar caps and ribs - Floor beams and support structures - Access door frames and components **Aerospace Structural Components:** - Spacecraft structural members - Satellite frame components - Missile airframe structures - Helicopter structural elements - Military aircraft upgrades **Defense Applications:** - Military vehicle structural components - Armored vehicle protection elements - Defense system structural parts - Military infrastructure components - Specialized defense applications **High-Performance Applications:** - Racing vehicle chassis components - High-performance sporting equipment - Specialized engineering structures - Advanced transportation systems - Competition aerospace vehicles --- #### **7. Key Characteristics** **T511 Temper Advantages:** - **Good Formability** for secondary operations - **Adequate Strength** for many applications - **Good Damage Tolerance** - **Suitable for Further Fabrication** - **Stable Mechanical Properties** **T6511 Temper Advantages:** - **Higher Strength** levels - **Improved Stress Corrosion Resistance** - **Better Dimensional Stability** - **Enhanced Fatigue Performance** - **Superior Strength-to-Weight Ratio** --- #### **8. Processing Characteristics** **Extrusion Characteristics:** - **Good Extrudability** with proper process control - **Requires Controlled Temperature** parameters - **Adequate Surface Quality** achievable - **Consistent Mechanical Properties** through cross-section - **Good dimensional control** possible **Machining:** - Moderate machinability rating: 40% - Requires sharp carbide tooling - Recommended cutting speed: 90-200 m/min - Adequate surface finish achievable - Special techniques for optimal results **Joining Methods:** - **Excellent Friction Stir Welding** capability - **Good Adhesive Bonding** characteristics - **Mechanical Fastening** - good performance - **Limited Arc Welding** capability - **Specialized Joining Techniques** recommended --- #### **9. Corrosion Resistance** **Performance Characteristics:** - **Atmospheric Corrosion**: Good resistance - **Stress Corrosion Cracking**: T6511 offers improved resistance - **Exfoliation Corrosion**: Moderate to good resistance - **Galvanic Corrosion**: Requires proper isolation - **Overall Performance**: Suitable for aerospace environments **Protection Methods:** - Chemical conversion coatings (Alodine) - Primer and paint systems - Proper material selection for mating components - Regular inspection and maintenance - Corrosion prevention compounds --- #### **10. Heat Treatment & Aging** **T511 Temper Process:** - Solution heat treatment: 530-540°C (986-1004°F) - Rapid quenching - Stress relieving by stretching (1-3%) - Naturally aged condition **T6511 Temper Process:** - Solution heat treatment: 530-540°C (986-1004°F) - Rapid quenching - Stress relieving by stretching (1-3%) - Artificial aging: 160-170°C (320-338°F) for 16-24 hours --- #### **11. Quality Assurance** **Specialized Testing:** - Chemical composition verification - Mechanical property testing - Fracture toughness evaluation - Fatigue testing - Corrosion resistance testing - Non-destructive testing **Certification:** - Aerospace quality certification - Full material traceability - Nadcap accreditation for special processes - Customer-specific quality requirements - Regular quality system audits --- #### **12. Comparison Between Tempers** | Property | 8090-T511 | 8090-T6511 | |----------|-----------|------------| | Tensile Strength (MPa) | 380-440 | 460-520 | | Yield Strength (MPa) | 240-300 | 360-420 | | Elongation (%) | 12-16 | 8-12 | | Primary Applications | Formed components | Structural applications | | Advantage | Formability | Strength & Stability | --- #### **Conclusion** Aluminum 8090-T511 and 8090-T6511 alloys represent advanced aluminum-lithium materials specifically optimized for extruded aerospace components. The T511 temper offers excellent formability for components requiring secondary fabrication, while the T6511 temper provides higher strength and improved stress corrosion resistance for critical structural applications. Both tempers leverage the inherent benefits of lithium addition - reduced density, increased stiffness, and improved specific properties - making them valuable for weight-critical aerospace structures. The specialized thermal-mechanical processing of these tempers ensures optimal mechanical properties and dimensional stability for extruded products. While requiring careful processing control and specialized handling, these advanced Al-Li alloys offer significant advantages for modern aerospace applications where weight reduction, performance improvement, and reliability are paramount considerations.

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 2257 gallon liquid totes Special package is available on request.