8090-T8151 Aluminum alloy,Aluminum 8090-T8151 alloy，E FORU

### **Aluminum 8090-T8151 Alloy Technical Datasheet** --- #### **1. Product Overview** **Aluminum 8090-T8151** is a specialized temper of the advanced aluminum-lithium alloy 8090, specifically designed for extruded products requiring a combination of high strength, good corrosion resistance, and excellent damage tolerance. The T8151 temper indicates the material has been solution heat-treated, stress-relieved by stretching (typically 1-3% permanent set), and artificially aged to achieve optimal properties for aerospace structural applications. --- #### **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 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 via Al₃Zr dispersoids - Ultra-low iron and silicon content for enhanced toughness - Specifically optimized for extrusion processing and T8151 aging response --- #### **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 | 86-92 W/m·K | - | | Electrical Conductivity | 19-22% 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 | 78-90 nΩ·m | - | --- #### **4. Mechanical Properties (T8151 Temper)** **Typical Mechanical Properties:** - **Tensile Ultimate Strength**: 450-510 MPa (65-74 ksi) - **Tensile Yield Strength (0.2% Offset)**: 350-410 MPa (51-59 ksi) - **Elongation in 50 mm**: 7-11% - **Shear Strength**: 270-310 MPa (39-45 ksi) - **Hardness (Vickers)**: 140-160 HV - **Fatigue Strength** (R=0.1, 5×10⁸ cycles): 170-200 MPa (25-29 ksi) - **Compressive Yield Strength**: 340-400 MPa (49-58 ksi) - **Fracture Toughness (K Ic)**: 27-31 MPa√m - **Bearing Strength**: 700-760 MPa (102-110 ksi) - **Bearing Yield Strength**: 530-590 MPa (77-86 ksi) --- #### **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 - **GB/T 3190**: Wrought aluminum and aluminum alloy chemical composition **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 0031**: Airbus Technical Specification - **BMS 7-336**: Boeing Material Specification **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** **Aircraft Structural Extrusions:** - Fuselage stringers and longerons - Wing spar caps and ribs - Floor beams and support structures - Bulkhead frames and components - Door and access frame elements **Aerospace 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** **T8151 Temper Advantages:** - **High Strength-to-Weight Ratio** - **Excellent Stiffness** (10% higher than conventional alloys) - **Good Damage Tolerance** - **Improved Stress Corrosion Resistance** - **Good Fatigue Performance** - **Enhanced Dimensional Stability** **Extrusion-Specific Benefits:** - **Consistent Properties** through cross-section - **Good Surface Quality** - **Excellent Straightness** characteristics - **Adequate Formability** for secondary operations - **Good Weldability** with proper techniques --- #### **8. Processing Characteristics** **Heat Treatment Process:** - **Solution Treatment**: 530-540°C (986-1004°F) for 1-2 hours - **Quenching**: Rapid water quenching - **Stress Relieving**: 1-3% permanent stretch - **Artificial Aging**: 165-175°C (329-347°F) for 20-28 hours **Extrusion Characteristics:** - **Good Extrudability** with proper process control - **Extrusion Temperature**: 400-450°C (752-842°F) - **Adequate Surface Quality** achievable - **Consistent Mechanical Properties** through cross-section - **Good Dimensional Control** possible **Machining:** - Moderate machinability rating: 38% - Requires sharp carbide tooling - Recommended cutting speed: 80-170 m/min - Feed rate: 0.08-0.20 mm/rev - Adequate surface finish achievable with proper techniques **Joining Methods:** - **Excellent Friction Stir Welding** capability - **Good Adhesive Bonding** characteristics - **Mechanical Fastening** - good performance - **Limited Arc Welding** suitability - **Specialized Techniques** recommended --- #### **9. Corrosion Resistance** **Performance Characteristics:** - **Atmospheric Corrosion**: Good resistance - **Stress Corrosion Cracking**: Improved resistance in T8151 temper - **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. Quality Assurance** **Testing Requirements:** - Chemical composition verification - Mechanical property testing - Fracture toughness evaluation - Fatigue testing - Corrosion resistance testing - Non-destructive testing **Specialized Testing:** - Differential Scanning Calorimetry for phase analysis - Transmission Electron Microscopy for microstructure - Small-angle X-ray scattering for precipitate analysis - Fatigue crack growth rate testing **Certification:** - Aerospace quality certification - Full material traceability - Nadcap accreditation for special processes - Customer-specific approvals - Regular quality system audits --- #### **11. Comparison with Similar Tempers** | Property | 8090-T8151 | 8090-T8511 | 2024-T3511 | |----------|------------|------------|------------| | Tensile Strength (MPa) | 450-510 | 460-520 | 425-485 | | Yield Strength (MPa) | 350-410 | 380-440 | 290-345 | | Density (g/cm³) | 2.54 | 2.54 | 2.78 | | Specific Strength | Excellent | Excellent | Good | | Stiffness | Superior | Superior | Good | --- #### **Conclusion** Aluminum 8090-T8151 alloy represents an optimized temper condition specifically developed for extruded aerospace components requiring high strength, good damage tolerance, and excellent dimensional stability. The T8151 treatment, incorporating stress relief by stretching followed by artificial aging, provides enhanced properties that make it particularly suitable for critical aircraft structural applications. The combination of lithium-induced density reduction, improved stiffness, and good corrosion resistance offers significant advantages over conventional aluminum alloys for weight-critical aerospace structures. While requiring specialized processing and careful attention to manufacturing techniques, 8090-T8151 has proven its capability in numerous aerospace applications where performance, reliability, and weight savings are paramount. The alloy's consistent performance in extruded forms continues to make it a valuable choice for advanced aerospace engineering requirements.

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 2260 gallon liquid totes Special package is available on request.