7116 Aluminum alloy,Aluminum 7116 alloy，E FORU

### **7116 Aluminum Alloy: High-Strength Automotive Alloy** **7116 Aluminum Alloy** is a heat-treatable aluminum-magnesium-silicon alloy specifically developed for automotive body sheet applications. This alloy offers an excellent combination of high strength, good formability, and superior surface quality, making it ideal for exposed automotive body panels where both structural performance and aesthetic appearance are critical. --- #### **1. Chemical Composition** | Element | Content (%) (Typical) | Role in the Alloy | | :--- | :--- | :--- | | **Silicon (Si)** | 0.6 - 1.0 | Enhances strength and improves fluidity | | **Iron (Fe)** | ≤ 0.30 | Impurity element - controlled for surface quality | | **Copper (Cu)** | 0.50 - 1.1 | Improves strength and age-hardening response | | **Manganese (Mn)** | 0.20 - 0.6 | Enhances strength and grain structure control | | **Magnesium (Mg)** | 0.8 - 1.4 | Primary strengthening element with silicon | | **Chromium (Cr)** | 0.10 - 0.25 | Improves corrosion resistance and grain structure | | **Zinc (Zn)** | 0.8 - 1.5 | Enhances strength and surface characteristics | | **Titanium (Ti)** | ≤ 0.10 | Grain refiner | | **Other Elements** | ≤ 0.05 each; ≤ 0.15 total | - | | **Aluminum (Al)** | Balance | Base metal | --- #### **2. Physical Properties** | Property | Value / Description | | :--- | :--- | | **Density** | 2.79 g/cm³ (0.101 lb/in³) | | **Melting Range** | 555°C - 650°C (1031°F - 1202°F) | | **Electrical Conductivity** | 40-45% IACS | | **Thermal Conductivity** | 160-180 W/m·K | | **Coefficient of Thermal Expansion** | 23.5 × 10⁻⁶/°C (20-100°C) | | **Modulus of Elasticity** | 69 GPa (10.0 × 10⁶ psi) | --- #### **3. Mechanical Properties (Typical for T6 Temper)** | Property | Typical Value | | :--- | :--- | | **Tensile Ultimate Strength** | 340 - 390 MPa (49 - 57 ksi) | | **Tensile Yield Strength (0.2% Offset)** | 290 - 340 MPa (42 - 49 ksi) | | **Elongation** | 12-18% | | **Compression Yield Strength** | 280 - 330 MPa (41 - 48 ksi) | | **Shear Strength** | 200 - 240 MPa (29 - 35 ksi) | | **Fatigue Strength** | 120 - 150 MPa (17 - 22 ksi) | | **Brinell Hardness** | 95 - 115 HB | --- #### **4. Product Applications** **7116 Aluminum Alloy** is primarily used in automotive and transportation applications: * **Automotive Body Panels:** * Hoods and trunk lids * Doors and fenders * * Roof panels * Body side panels * **Transportation Applications:** * Truck body panels * Bus exterior panels * Railway vehicle bodywork * **Consumer Products:** * Appliance panels * Electronic enclosures * Architectural panels * **Special Applications:** * High-quality painted components * Class A surface components * Structural body components --- #### **5. International Standards** | Standard Body | Designation | Specification | | :--- | :--- | :--- | | **Aluminum Association** | 7116 | AA Teal Sheets | | **ASTM International** | 7116 | ASTM B209 | | **European Norm** | EN AW-7116 | EN 485-2 | | **Japanese Standards** | A7116 | JIS H 4000 | | **Unified Numbering System** | A97116 | UNS Registry | --- #### **6. Key Characteristics** **Advantages:** * **Excellent surface quality** for painting and finishing * **Good formability** in T4 temper * **High strength** after paint bake cycle * **Superior corrosion resistance** * **Good weldability** * **Excellent hemming characteristics** * **Consistent mechanical properties** **Limitations:** * Requires controlled heat treatment * Limited to sheet product forms * Not suitable for high-temperature applications * Higher cost than some automotive alloys --- #### **7. Manufacturing Considerations** * **Stamping:** Excellent formability in solution-treated condition * **Welding:** Good weldability using resistance welding methods * **Hemming:** Superior edge hemming characteristics * **Painting:** Excellent surface for paint adhesion and finish * **Heat Treatment:** Responds well to paint bake hardening --- #### **8. Special Features** **7116 Aluminum Alloy** offers automotive-specific advantages: * **Paint Bake Response:** Significant strength increase during paint curing cycle * **Surface Quality:** Excellent for Class A automotive surfaces * **Formability:** Good balance between strength and formability * **Corrosion Performance:** Superior for automotive environments **Automotive Manufacturing Process:** 1. Blanking and stamping in T4 temper 2. Forming to final shape 3. Assembly and welding 4. Phosphating and painting 5. Paint bake cycle (typically 180°C for 20-30 minutes) 6. Final strength development --- #### **9. Performance Characteristics** * **Corrosion Resistance:** Excellent for automotive environments * **Fatigue Performance:** Good for body panel applications * **Dent Resistance:** Superior to lower strength alloys * **Crash Performance:** Good energy absorption characteristics **7116 Aluminum Alloy** represents a specialized development in automotive aluminum technology, specifically engineered to meet the demanding requirements of modern vehicle body construction. The alloy's unique combination of high strength after paint baking, excellent formability in the soft temper, and superior surface quality makes it particularly valuable for automotive manufacturers seeking to reduce vehicle weight while maintaining structural integrity and aesthetic appeal. The continued adoption of 7116 and similar alloys demonstrates the automotive industry's commitment to lightweighting and improved fuel efficiency through advanced materials engineering.

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 2181 gallon liquid totes Special package is available on request.