7150-T7751 Aluminum alloy,Aluminum 7150-T7751 alloy，E FORU

### **7150-T7751 Aluminum Alloy: Advanced High-Strength Aerospace Alloy** **7150-T7751 Aluminum Alloy** is a premium high-strength aluminum-zinc-magnesium-copper alloy specifically developed for aerospace applications requiring exceptional strength, good fracture toughness, and superior corrosion resistance. The T7751 temper provides an optimal balance of properties through specialized thermomechanical processing. --- #### **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 T7751 Temper** The T7751 temper designation indicates: - **T7**: Solution heat-treated and artificially over-aged - **75**: Stress-relieved by stretching - **1**: Specific aging treatment to achieve optimized properties **Key Characteristics:** - Enhanced corrosion resistance compared to T6 temper - Good balance of strength and toughness - Reduced residual stresses - Improved dimensional stability --- #### **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** | 510 - 550 MPa (74 - 80 ksi) | | **Tensile Yield Strength (0.2% Offset)** | 450 - 490 MPa (65 - 71 ksi) | | **Elongation** | 9-12% | | **Compression Yield Strength** | 440 - 480 MPa (64 - 70 ksi) | | **Shear Strength** | 290 - 320 MPa (42 - 46 ksi) | | **Fatigue Strength** | 160 - 190 MPa (23 - 28 ksi) | | **Fracture Toughness** | Excellent | --- #### **5. Product Applications** **7150-T7751** is extensively used in critical aerospace applications: * **Aircraft Structures:** * Upper wing skins and planks * Fuselage frames and bulkheads * Wing ribs and spars * Stabilizer components * **Military Applications:** * Fighter aircraft components * Military transport structures * Defense system components * **Space Applications:** * Launch vehicle structures * Spacecraft components * **Commercial Aviation:** * Commercial aircraft primary structures * Wing box components * Fuselage stringers --- #### **6. International Standards** | Standard Body | Designation | Specification | | :--- | :--- | :--- | | **Aluminum Association** | 7150-T7751 | AA Teal Sheets | | **ASTM International** | 7150-T7751 | ASTM B209 | | **Aerospace (AMS)** | 7150-T7751 | AMS 4332 | | **European Norm** | EN AW-7150 T7751 | EN 485-2 | | **Unified Numbering System** | A97150 | UNS Registry | --- #### **7. Key Characteristics** **Advantages:** * **Excellent strength-to-weight ratio** * **Superior corrosion resistance** * **Good fracture toughness** * **Excellent fatigue performance** * **Improved stress corrosion cracking resistance** * **Good damage tolerance** * **Enhanced thermal stability** **Limitations:** * Higher cost than conventional alloys * Requires precise heat treatment control * Limited formability in aged condition * Requires specialized manufacturing processes --- #### **8. Manufacturing Considerations** * **Machining:** Good machinability with proper tooling * **Forming:** Best formed in annealed condition before heat treatment * **Welding:** Requires specialized techniques * **Heat Treatment:** Precise control of aging parameters essential * **Surface Treatment:** Excellent for anodizing and coating --- #### **9. Special Features** **7150-T7751** offers advanced performance characteristics: * **Corrosion Performance:** Excellent exfoliation and stress corrosion resistance * **Property Balance:** Optimal combination of strength and toughness * **Quality Consistency:** Reliable mechanical properties * **Aerospace Heritage:** Proven performance in demanding applications **Comparison with 7150-T6:** - Better corrosion resistance - Improved stress corrosion cracking resistance - Slightly lower strength but better overall property balance - Enhanced dimensional stability --- #### **10. Performance in Service** * **Fatigue Performance:** Excellent for aircraft structural applications * **Corrosion Resistance:** Superior in aerospace environments * **Damage Tolerance:** Good resistance to crack propagation * **Temperature Capability:** Suitable for aerospace service conditions **7150-T7751 Aluminum Alloy** represents a significant advancement in aerospace aluminum technology, providing an excellent balance of mechanical properties and corrosion resistance for critical aircraft structures. The specialized T7751 temper process ensures consistent performance and reliability in demanding aerospace applications, making this alloy a preferred choice for next-generation aircraft designs where weight reduction, durability, and safety 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 2187 gallon liquid totes Special package is available on request.