7072-H14 Aluminum alloy,Aluminum 7072-H14 alloy，E FORU

### **7072-H14 Aluminum Alloy: 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 H14 temper indicates a strain-hardened state to a half-hard temper, providing increased strength while maintaining adequate formability for manufacturing processes. --- #### **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)** | ≤ 0.04 | Impurity element | | **Titanium (Ti)** | ≤ 0.05 | Impurity element | | **Other Elements** | ≤ 0.05 each; ≤ 0.15 total | - | | **Aluminum (Al)** | Balance | Base metal | --- #### **2. Understanding the H14 Temper** The H14 temper designation indicates: - **H1**: Strain-hardened only - **4**: Half-hard temper, providing a specific level of strength and hardness **Key Characteristics:** - Higher strength compared to H12 temper - Moderate formability - Good surface quality - Consistent mechanical properties - Suitable for applications requiring higher strength than H12 but more formability than H16 --- #### **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)** | 130 - 180 MPa (19 - 26 ksi) | | **Elongation** | 6-12% | | **Shear Strength** | 95 - 125 MPa (14 - 18 ksi) | | **Fatigue Strength** | 60 - 80 MPa (9 - 12 ksi) | | **Brinell Hardness** | 40 - 55 HB | --- #### **5. Product Applications** **7072-H14** is primarily used in: * **Cladding Applications:** * Protective cladding for aircraft alloys (e.g., 7075, 2024) * Architectural panel cladding * Marine component cladding * Corrosion protection layers * **Heat Exchanger Components:** * Fins for air conditioning systems * Radiator fins * Heat exchanger tubes * HVAC system components * **Electrical Applications:** * Heat sink components * Electrical conductor cladding * Electronic packaging * **Other Applications:** * Packaging materials * Decorative trim * Building products * Laminated products --- #### **6. International Standards** | Standard Body | Designation | Specification | | :--- | :--- | :--- | | **Aluminum Association** | 7072-H14 | AA Teal Sheets | | **ASTM International** | 7072-H14 | ASTM B209 / B479 | | **Aerospace (AMS)** | 7072 | AMS 4007 | | **European Norm** | EN AW-7072 H14 | 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 - Moderate formability - Good surface finish characteristics - Higher strength than H12 temper - Consistent mechanical properties **Limitations:** - Lower formability compared to H12 temper - Not suitable for primary structural applications - Limited high-temperature performance - Requires proper handling to maintain surface quality --- #### **8. Manufacturing Considerations** * **Forming:** Good formability in H14 temper for moderate forming operations * **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-H14** offers unique functional characteristics: * **Galvanic Protection:** When used as cladding, it sacrificially protects the core alloy from corrosion due to its electrochemical potential * **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 * **Strength-Formability Balance:** The H14 temper offers a good compromise between strength and formability The alloy's primary value lies in its electrochemical properties and thermal performance. The H14 temper provides increased strength for applications requiring better handling characteristics and structural integrity while maintaining sufficient formability for manufacturing processes. **7072-H14 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 essential material in specific industrial applications requiring both corrosion protection and efficient heat transfer with moderate strength requirements.

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 2164 gallon liquid totes Special package is available on request.