7050-T73511; 7050-T73510 Aluminum alloy,Aluminum 7050-T73511; 7050-T73510 alloy，E FORU

### **7050-T73511 / 7050-T73510 Aluminum Alloy: High-Strength Extrusions for Aerospace** **7050-T73511 and 7050-T73510** are specific temper designations for extruded products made from the premium 7050 aluminum alloy. These tempers represent the material in its final, fully heat-treated condition, specifically optimized for **extruded shapes, rods, and bars**. The T7351 temper provides an excellent balance of high strength, superior stress corrosion cracking (SCC) resistance, and good fracture toughness, making these products essential for critical aerospace structural components. --- #### **1. Chemical Composition** The composition follows the standard 7050 alloy with tight controls. | Element | Content (%) (Typical) | | :--- | :--- | | **Zinc (Zn)** | 5.7 - 6.7 | | **Magnesium (Mg)** | 1.8 - 2.7 | | **Copper (Cu)** | 2.0 - 2.6 | | **Zirconium (Zr)** | 0.08 - 0.15 | | **Iron (Fe)** | ≤ 0.15 | | **Silicon (Si)** | ≤ 0.12 | | **Other Elements** | ≤ 0.05 each; ≤ 0.15 total | | **Aluminum (Al)** | Balance | --- #### **2. Understanding the T73511 and T73510 Tempers** Both tempers share the same fundamental thermal-mechanical treatment: * **T7351**: Solution Heat-Treated, Stress-Relieved by Stretching (1-3% permanent set), and Artificially Over-Aged to the T74 condition. The final digit indicates the specific product form and level of straightening: * **T73511**: Applies to **Extruded Rods and Bars**. The final "1" typically indicates that the product has been straightened (if necessary) to meet standard tolerances. * **T73510**: Applies to **Extruded Shapes**. The final "0" indicates that the product is supplied without final straightening after the aging treatment. **Key Characteristics:** * The over-aging (T74) sacrifices a small amount of peak strength to **dramatically improve resistance to Stress Corrosion Cracking (SCC)**. * The stretching after solution heat-treatment provides dimensional stability and reduces residual stresses. --- #### **3. Physical Properties** | Property | Value / Description | | :--- | :--- | | **Density** | 2.83 g/cm³ | | **Melting Range** | 490°C - 630°C | | **Electrical Conductivity** | 38-42% IACS | | **Thermal Conductivity** | 120-140 W/m·K | | **Coefficient of Thermal Expansion** | 23.5 x 10⁻⁶/°C | | **Modulus of Elasticity** | 71 GPa | --- #### **4. Mechanical Properties (Typical)** | Property | T73511/T73510 (Typical) | | :--- | :--- | | **Tensile Strength** | 510 - 540 MPa | | **Tensile Yield Strength** | 440 - 470 MPa | | **Elongation** | 10 - 12% | | **Hardness (Brinell)** | 135-150 HB | --- #### **5. Product Applications** These specific extruded tempers are used for critical aerospace components. * **Aircraft Wing Structures:** Stringers, ribs, and spar chords * **Fuselage Components:** Longerons, frames, and seat tracks * **Landing Gear Support Structures** * **Military Aircraft:** Bulkheads and other structural members * **Space Vehicle:** Structural frames and supports --- #### **6. International Standards** | Standard Body | Designation | Relevant Standard | | :--- | :--- | :--- | | **Aluminum Association** | 7050-T73511/T73510 | AA Teal Sheets | | **ASTM International** | 7050-T73511/T73510 | ASTM B221 | | **Aerospace (AMS)** | 7050-T73511 | AMS 4337 | | **European Norm (EN)** | EN AW-7050 T73511 | EN 755-2 | --- #### **Key Advantages & Summary** * **Optimized for Extrusion:** Specifically processed for extruded product forms * **Excellent SCC Resistance:** Reliable performance in corrosive environments * **High Strength-to-Weight Ratio:** Ideal for weight-critical aerospace structures * **Good Damage Tolerance:** Resistant to crack propagation * **Dimensional Stability:** Low residual stresses minimize distortion during machining **7050-T73511/T73510** represents the premium choice for aerospace extruded components where the combination of high strength, excellent corrosion resistance, and good toughness is required. These tempers provide reliable performance in safety-critical aircraft structures.

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 2147 gallon liquid totes Special package is available on request.