7068-T6; 7068-T6511 Aluminum alloy,Aluminum 7068-T6; 7068-T6511 alloy，E FORU

### **7068-T6 / 7068-T6511 Aluminum Alloy: Ultra-High Strength Aluminum Alloy** **7068 Aluminum Alloy** is one of the strongest commercially available aluminum alloys from the Al-Zn-Mg-Cu (7xxx) series. In the T6 and T6511 tempers, this alloy achieves exceptional strength levels, making it suitable for the most demanding structural applications where weight reduction is critical. --- #### **1. Chemical Composition** | Element | Content (%) (Typical) | | :--- | :--- | | **Zinc (Zn)** | 7.3 - 8.3 | | **Magnesium (Mg)** | 2.5 - 3.3 | | **Copper (Cu)** | 1.6 - 2.4 | | **Zirconium (Zr)** | 0.05 - 0.15 | | **Iron (Fe)** | ≤ 0.15 | | **Silicon (Si)** | ≤ 0.12 | | **Manganese (Mn)** | ≤ 0.10 | | **Chromium (Cr)** | ≤ 0.05 | | **Titanium (Ti)** | ≤ 0.10 | | **Other Elements** | ≤ 0.05 each | | **Aluminum (Al)** | Balance | --- #### **2. Temper Designations** **T6 Temper:** - Solution heat-treated and artificially aged - Peak strength condition - May contain residual stresses **T6511 Temper:** - Solution heat-treated - Stress-relieved by stretching - Artificially aged - Applies to extruded products - Improved dimensional stability --- #### **3. Physical Properties** | Property | Value | | :--- | :--- | | **Density** | 2.85 g/cm³ | | **Melting Range** | 475°C - 635°C | | **Electrical Conductivity** | 35-40% IACS | | **Thermal Conductivity** | 115-130 W/m·K | | **Coefficient of Thermal Expansion** | 23.5 × 10⁻⁶/°C | | **Modulus of Elasticity** | 71 GPa | --- #### **4. Mechanical Properties (Typical)** | Property | T6 Temper | T6511 Temper | | :--- | :--- | :--- | | **Tensile Ultimate Strength** | 610-650 MPa | 600-640 MPa | | **Tensile Yield Strength** | 560-600 MPa | 550-590 MPa | | **Elongation** | 8-11% | 9-12% | | **Compression Yield Strength** | 550-590 MPa | 540-580 MPa | | **Shear Strength** | 340-370 MPa | 330-360 MPa | --- #### **5. Product Applications** - **Aerospace Components** - **High-Performance Automotive Parts** - **Military Equipment** - **Racing Components** - **High-Strength Fasteners** - **Structural Components** --- #### **6. International Standards** | Standard Body | Designation | | :--- | :--- | | **Aluminum Association** | 7068-T6/T6511 | | **ASTM International** | ASTM B221 | | **Aerospace (AMS)** | AMS 4338 | | **European Norm** | EN AW-7068 | --- #### **7. Key Characteristics** **Advantages:** - Ultra-high strength-to-weight ratio - Excellent mechanical properties - Good machinability - Good wear resistance **Limitations:** - Lower corrosion resistance - Requires stress relief for machining - Higher cost - Limited formability in aged condition --- #### **8. Manufacturing Considerations** - **Machining:** Requires carbide tooling - **Forming:** Best formed in annealed condition - **Welding:** Not generally recommended - **Heat Treatment:** Critical for optimal properties **7068-T6/T6511** represents the highest strength level in commercial aluminum alloys, offering exceptional performance for applications where weight savings and high strength are paramount. The T6511 temper provides improved dimensional stability for extruded products requiring precise machining.

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 2160 gallon liquid totes Special package is available on request.