Alclad 7075-O Aluminum alloy,Aluminum 7075-O alloy，E FORU

### **Alclad 7075-O Aluminum Alloy: Annealed High-Strength Clad Alloy** **Alclad 7075-O Aluminum Alloy** consists of a 7075 aluminum alloy core metallurgically bonded with a thin layer of high-purity aluminum or aluminum alloy cladding. The O temper (annealed) condition represents the softest state, providing maximum formability while maintaining the high-strength potential of the 7075 core alloy after subsequent heat treatment. --- #### **1. Chemical Composition** **Core Alloy (7075):** | Element | Content (%) (Typical) | | :--- | :--- | | **Zinc (Zn)** | 5.1 - 6.1 | | **Magnesium (Mg)** | 2.1 - 2.9 | | **Copper (Cu)** | 1.2 - 2.0 | | **Chromium (Cr)** | 0.18 - 0.28 | | **Iron (Fe)** | ≤ 0.50 | | **Silicon (Si)** | ≤ 0.40 | | **Manganese (Mn)** | ≤ 0.30 | | **Titanium (Ti)** | ≤ 0.20 | | **Other Elements** | ≤ 0.05 each | | **Aluminum (Al)** | Balance | **Cladding Layer:** - Typically high-purity aluminum (1100 series) or aluminum-zinc alloy (7072) - Thickness: Usually 2-5% of total thickness per side - Provides sacrificial corrosion protection --- #### **2. Understanding the Alclad Construction and O Temper** **Alclad Feature:** - Metallurgical bond between core and cladding - Sacrificial corrosion protection - Maintains core mechanical properties - Improved environmental durability **O Temper Characteristics:** - Fully annealed condition - Maximum ductility and formability - Recrystallized microstructure - Lowest strength state - Ideal for severe forming operations --- #### **3. Physical Properties** | Property | Value / Description | | :--- | :--- | | **Density** | 2.81 g/cm³ (0.102 lb/in³) | | **Melting Range** | 477°C - 638°C (890°F - 1180°F) | | **Electrical Conductivity** | 33-38% IACS | | **Thermal Conductivity** | 120-140 W/m·K | | **Coefficient of Thermal Expansion** | 23.6 × 10⁻⁶/°C | | **Modulus of Elasticity** | 71 GPa (10.3 × 10⁶ psi) | --- #### **4. Mechanical Properties (Typical - O Temper)** | Property | Typical Value | | :--- | :--- | | **Tensile Ultimate Strength** | 220 - 260 MPa (32 - 38 ksi) | | **Tensile Yield Strength (0.2% Offset)** | 105 - 145 MPa (15 - 21 ksi) | | **Elongation** | 12-18% | | **Shear Strength** | 150 - 180 MPa (22 - 26 ksi) | | **Brinell Hardness** | 60 - 75 HB | *Note: Properties after solution heat treatment and aging (T6 temper):* - *Tensile Strength: 510-570 MPa (74-83 ksi)* - *Yield Strength: 430-500 MPa (62-73 ksi)* --- #### **5. Product Applications** **Alclad 7075-O** is used in applications requiring both formability and high strength potential: * **Aerospace Components:** * Aircraft skin panels * Structural components requiring forming * Wing and fuselage components * Military aircraft parts * **Marine Applications:** * Boat and ship components * Marine hardware * Offshore structures * **Defense Applications:** * Military vehicle components * Armor components * Defense system structures * **High-Performance Applications:** * Racing components * High-stress structural parts * Critical machinery components --- #### **6. International Standards** | Standard Body | Designation | Specification | | :--- | :--- | :--- | | **Aluminum Association** | 7075-O Alclad | AA Teal Sheets | | **ASTM International** | 7075-O Alclad | ASTM B209 | | **Aerospace (AMS)** | AMS 4046 | Clad 7075 Sheet | | **Military Standards** | MIL-A-12545 | Aluminum Alloy Armor | | **European Norm** | EN AW-7075 Alclad | EN 485-2 | --- #### **7. Key Characteristics** **Advantages:** - **Excellent corrosion resistance** due to sacrificial cladding - **High strength potential** after heat treatment - **Maximum formability** in O temper - Good fatigue resistance - Excellent strength-to-weight ratio - Superior environmental durability **Limitations:** - Lower strength in O temper requires subsequent heat treatment - Higher cost than non-clad alternatives - Cladding reduces overall strength slightly - Requires specialized processing equipment --- #### **8. Manufacturing Considerations** * **Forming:** Excellent in O temper for complex shapes * **Heat Treatment:** Can be solution treated and aged after forming * **Machining:** Good machinability after heat treatment * **Joining:** Good weldability with proper techniques * **Surface Treatment:** Excellent for painting and coating --- #### **9. Special Features** **Alclad 7075-O** offers unique advantages: * **Corrosion Protection:** Cladding sacrificially protects core from corrosion * **Forming Flexibility:** Can be formed in O temper and strengthened later * **High Strength Potential:** Achieves 7075-T6 properties after heat treatment * **Damage Tolerance:** Cladding provides additional surface protection * **Maintenance Reduction:** Extended service life in corrosive environments **Typical Manufacturing Sequence:** 1. Form component in O temper condition 2. Solution heat treat at 465-480°C 3. Quench rapidly 4. Artificial age at 120-130°C 5. Final machining and finishing --- #### **10. Quality Assurance** - Cladding thickness controlled to specifications - Metallurgical bond integrity ensured - Chemical composition verified - Mechanical properties tested - Surface quality inspected **Alclad 7075-O Aluminum Alloy** provides an optimal solution for applications requiring both severe formability during manufacturing and high strength with excellent corrosion resistance in service. The combination of 7075's strength potential with sacrificial cladding protection makes it particularly valuable for aerospace, marine, and defense applications where performance and durability are critical.

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 2166 gallon liquid totes Special package is available on request.