7072-H113 Aluminum alloy,Aluminum 7072-H113 alloy，E FORU

### **7072-H113 Aluminum Alloy: Anodic Cladding and Finstock Alloy** **7072 Aluminum Alloy** is a non-heat-treatable aluminum-zinc alloy primarily used as a cladding material for other aluminum alloys and for finstock applications in heat exchangers. The H113 temper indicates a strain-hardened state to a specific level of hardness and strength. --- #### **1. Chemical Composition** | Element | Content (%) (Typical) | Role in the Alloy | | :--- | :--- | :--- | | **Zinc (Zn)** | 0.8 - 1.3 | Provides galvanic protection and lowers electrochemical potential | | **Iron (Fe)** | 0.6 - 1.0 | Increases strength and improves finstock performance | | **Silicon (Si)** | ≤ 0.10 | Impurity element | | **Copper (Cu)** | ≤ 0.10 | Impurity element | | **Manganese (Mn)** | ≤ 0.10 | Impurity element | | **Magnesium (Mg)** | ≤ 0.10 | Impurity element | | **Chromium (Cr)** | ≤ 0.05 | Impurity element | | **Titanium (Ti)** | ≤ 0.05 | Impurity element | | **Other Elements** | ≤ 0.05 each; ≤ 0.15 total | - | | **Aluminum (Al)** | Balance | Base metal | --- #### **2. Understanding the H113 Temper** The H113 temper designation indicates: - **H1**: Strain-hardened only - **1**: Specific degree of strain hardening - **3**: Stress-relieved by controlled thermal treatment to achieve specified mechanical properties **Key Characteristics:** - Moderate strength achieved through cold working - Good formability and ductility - Consistent mechanical properties - Stable microstructure for subsequent manufacturing processes --- #### **3. Physical Properties** | Property | Value / Description | | :--- | :--- | | **Density** | 2.72 g/cm³ (0.098 lb/in³) | | **Melting Range** | 640°C - 655°C (1184°F - 1211°F) | | **Electrical Conductivity** | 48-52% IACS | | **Thermal Conductivity** | 180-200 W/m·K | | **Coefficient of Thermal Expansion** | 23.6 × 10⁻⁶/°C (20-100°C) | | **Modulus of Elasticity** | 69 GPa (10.0 × 10⁶ psi) | --- #### **4. Mechanical Properties (Typical)** | Property | Typical Value | | :--- | :--- | | **Tensile Ultimate Strength** | 150 - 200 MPa (22 - 29 ksi) | | **Tensile Yield Strength (0.2% Offset)** | 120 - 170 MPa (17 - 25 ksi) | | **Elongation** | 8-15% | | **Shear Strength** | 90 - 120 MPa (13 - 17 ksi) | | **Fatigue Strength** | 60 - 80 MPa (9 - 12 ksi) | | **Brinell Hardness** | 40 - 55 HB | --- #### **5. Product Applications** **7072-H113** is primarily used in: * **Cladding Applications:** * Protective cladding for aircraft alloys (e.g., 7075, 2024) * * Architectural panel cladding * Marine component cladding * **Heat Exchanger Components:** * Fins for air conditioning systems * Radiator fins * Heat exchanger tubes * **Electrical Applications:** * Heat sink components * Electrical conductor cladding * **Other Applications:** * Packaging materials * Decorative trim * Building products --- #### **6. International Standards** | Standard Body | Designation | Specification | | :--- | :--- | :--- | | **Aluminum Association** | 7072-H113 | AA Teal Sheets | | **ASTM International** | 7072-H113 | ASTM B209 / B479 | | **Aerospace (AMS)** | 7072 | AMS 4007 | | **European Norm** | EN AW-7072 H113 | EN 485-2 | | **Unified Numbering System** | A97072 | UNS Registry | --- #### **7. Key Characteristics** **Advantages:** - **Excellent sacrificial corrosion protection** when clad to core alloys - High thermal conductivity - Good electrical conductivity - Excellent formability and bendability - Consistent mechanical properties - Good surface finish characteristics **Limitations:** - Moderate strength compared to heat-treatable alloys - Not suitable for primary structural applications - Limited high-temperature performance - Requires proper handling to maintain surface quality --- #### **8. Manufacturing Considerations** * **Forming:** Excellent formability in H113 temper * **Joining:** Good weldability and brazeability * **Machining:** Fair machinability - requires sharp tools * **Surface Treatment:** Excellent for anodizing and coating * **Heat Treatment:** Non-heat-treatable - properties achieved through cold work only --- #### **9. Special Features** **7072-H113** offers unique functional characteristics: * **Galvanic Protection:** When used as cladding, it sacrificially protects the core alloy from corrosion * **Thermal Performance:** Excellent heat transfer characteristics ideal for finstock applications * **Manufacturing Versatility:** Can be roll-bonded to other aluminum alloys * **Surface Quality:** Provides excellent surface finish for decorative applications The alloy's primary value lies in its electrochemical properties and thermal performance rather than mechanical strength. Its controlled strain-hardened condition (H113) ensures consistent performance in manufacturing processes while maintaining the essential characteristics that make 7072 valuable for its specialized applications. **7072-H113 Aluminum Alloy** serves critical functional roles in multi-layer aluminum products and heat transfer applications, where its unique combination of electrochemical, thermal, and mechanical properties make it an indispensable material in specific industrial sectors.

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 2162 gallon liquid totes Special package is available on request.