7150-T77511 Aluminum alloy,Aluminum 7150-T77511 alloy, Extrusions，E FORU

### **7150-T77511 Aluminum Alloy: High-Strength Aerospace Extrusions** **7150-T77511 Aluminum Alloy** is a specialized temper of the premium 7150 aluminum alloy specifically designed for extruded products. This variant combines the inherent high strength of 7150 alloy with optimized processing for extruded shapes, rods, and bars, making it ideal for critical aerospace structural components. --- #### **1. Chemical Composition** | Element | Content (%) (Typical) | Role in the Alloy | | :--- | :--- | :--- | | **Zinc (Zn)** | 5.9 - 6.9 | Primary strengthening element through formation of MgZn₂ precipitates | | **Magnesium (Mg)** | 2.0 - 2.7 | Enhances strength and age-hardening response | | **Copper (Cu)** | 1.9 - 2.5 | Improves strength and stress corrosion cracking resistance | | **Zirconium (Zr)** | 0.08 - 0.15 | Controls grain structure and inhibits recrystallization | | **Iron (Fe)** | ≤ 0.15 | Tightly controlled impurity for improved toughness | | **Silicon (Si)** | ≤ 0.12 | Tightly controlled impurity for improved ductility | | **Manganese (Mn)** | ≤ 0.10 | - | | **Chromium (Cr)** | ≤ 0.04 | - | | **Titanium (Ti)** | ≤ 0.06 | - | | **Other Elements** | ≤ 0.05 each; ≤ 0.15 total | - | | **Aluminum (Al)** | Balance | Base metal | --- #### **2. Understanding the T77511 Temper** The T77511 temper designation specifically for extrusions indicates: - **T7**: Solution heat-treated and artificially over-aged - **75**: Stress-relieved by stretching - **11**: Applies to extruded rods and bars **Key Characteristics for Extrusions:** - Optimized for extruded product forms - Enhanced dimensional stability - Consistent mechanical properties throughout cross-section - Excellent surface quality --- #### **3. Physical Properties** | Property | Value / Description | | :--- | :--- | | **Density** | 2.82 g/cm³ (0.102 lb/in³) | | **Melting Range** | 488°C - 638°C (910°F - 1180°F) | | **Electrical Conductivity** | 37-41% IACS | | **Thermal Conductivity** | 125-140 W/m·K | | **Coefficient of Thermal Expansion** | 23.4 × 10⁻⁶/°C (20-100°C) | | **Modulus of Elasticity** | 71 GPa (10.3 × 10⁶ psi) | --- #### **4. Mechanical Properties (Typical)** | Property | Typical Value | | :--- | :--- | | **Tensile Ultimate Strength** | 500 - 540 MPa (73 - 78 ksi) | | **Tensile Yield Strength (0.2% Offset)** | 440 - 480 MPa (64 - 70 ksi) | | **Elongation** | 10-13% | | **Compression Yield Strength** | 430 - 470 MPa (62 - 68 ksi) | | **Shear Strength** | 280 - 310 MPa (41 - 45 ksi) | | **Fatigue Strength** | 155 - 185 MPa (22 - 27 ksi) | | **Brinell Hardness** | 125 - 140 HB | --- #### **5. Product Applications** **7150-T77511** is specifically used for extruded aerospace components: * **Aircraft Structural Extrusions:** * Wing stringers and spars * Fuselage longerons * Floor beams and seat tracks * Structural frames and ribs * **Spacecraft Components:** * Launch vehicle structural members * Satellite frames * Spacecraft structural elements * **Military Applications:** * Military aircraft structural extrusions * Defense system components * Armored vehicle structural members * **Commercial Aviation:** * Commercial aircraft stringers * Fuselage frame extrusions * Wing rib components --- #### **6. International Standards** | Standard Body | Designation | Specification | | :--- | :--- | :--- | | **Aluminum Association** | 7150-T77511 | AA Teal Sheets | | **ASTM International** | 7150-T77511 | ASTM B221 | | **Aerospace (AMS)** | 7150-T77511 | AMS 4333 | | **European Norm** | EN AW-7150 T77511 | EN 755-2 | | **Unified Numbering System** | A97150 | UNS Registry | --- #### **7. Key Characteristics** **Advantages for Extruded Products:** * **Excellent extrusion characteristics** * **High strength-to-weight ratio** * **Superior corrosion resistance** * **Good fracture toughness** * **Excellent fatigue performance** * **Consistent properties in extruded sections** * **Good surface finish** **Limitations:** * Higher cost than conventional extrusion alloys * Requires specialized extrusion expertise * Limited to extruded product forms * Complex heat treatment requirements --- #### **8. Manufacturing Considerations for Extrusions** * **Extrusion:** Excellent extrudability with complex shape capability * **Machining:** Good machinability with proper tooling * **Welding:** Requires specialized techniques * **Heat Treatment:** Precise control essential for consistent properties * **Surface Treatment:** Excellent for anodizing and coating --- #### **9. Special Features for Extruded Applications** **7150-T77511** offers unique advantages for extruded components: * **Profile Complexity:** Capable of producing complex extruded shapes * **Property Consistency:** Uniform mechanical properties throughout sections * **Dimensional Stability:** Excellent for precision structural components * **Quality Assurance:** Consistent performance in extruded forms **Extrusion Process Benefits:** - Near-net shape manufacturing capability - Reduced machining requirements - Excellent grain flow characteristics - Cost-effective for complex cross-sections --- #### **10. Performance in Aerospace Applications** * **Fatigue Performance:** Excellent for aircraft structural extrusions * **Corrosion Resistance:** Superior in aerospace environments * **Damage Tolerance:** Good resistance to crack propagation * **Structural Efficiency:** Optimal for weight-critical applications **7150-T77511 Aluminum Alloy Extrusions** represent a specialized solution for aerospace structural applications where the combination of high strength, excellent corrosion resistance, and the manufacturing advantages of extrusion are required. The specific T77511 temper ensures that extruded products maintain consistent properties and dimensional stability, making this alloy particularly valuable for aircraft stringers, longerons, and other critical structural components where reliability and performance are essential.

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 2188 gallon liquid totes Special package is available on request.