7046 Aluminum alloy,Aluminum 7046 alloy，E FORU

### **7046 Aluminum Alloy: Product Introduction** **7046 Aluminum Alloy** is a high-strength, heat-treatable alloy belonging to the 7xxx series (Al-Zn-Mg-Cu system). It is specifically engineered to provide an excellent combination of strength, toughness, and stress corrosion cracking (SCC) resistance. Primarily used in the aerospace and high-performance automotive industries, 7046 is a premium choice for critical structural components where weight savings and reliability are paramount. --- #### **1. Chemical Composition** The properties of 7046 alloy are derived from its precise chemical composition. The following table outlines the typical weight percentage of its key elements according to international standards. | Element | Content (%) (Typical) | Role in the Alloy | | :--- | :--- | :--- | | **Zinc (Zn)** | 7.2 - 8.4 | Primary strengthening element; forms the main hardening precipitates. | | **Magnesium (Mg)** | 1.5 - 2.1 | Co-operates with Zn to form the strengthening η' (MgZn₂) phase during aging. | | **Copper (Cu)** | 0.35 - 0.65 | Enhances strength and improves resistance to stress corrosion cracking. | | **Zirconium (Zr)** | 0.05 - 0.15 | Forms fine Al₃Zr dispersoids that inhibit recrystallization and control grain structure. | | **Chromium (Cr)** | ≤ 0.04 | Alternative grain structure control agent. | | **Manganese (Mn)** | ≤ 0.10 | - | | **Iron (Fe)** | ≤ 0.40 | Impurity (controlled to maintain toughness). | | **Silicon (Si)** | ≤ 0.30 | Impurity (controlled to maintain toughness). | | **Titanium (Ti)** | ≤ 0.06 | - | | **Other Impurities** | ≤ 0.05 each; ≤ 0.15 total | - | | **Aluminum (Al)** | Balance | Base metal. | --- #### **2. Physical Properties** The physical properties of 7046 alloy are typical for high-strength aluminum alloys and can vary slightly with temper (heat treatment condition). | Property | Value / Description | | :--- | :--- | | **Density** | ≈ 2.82 g/cm³ (0.102 lb/in³) | | **Melting Range** | ≈ 475°C - 635°C (887°F - 1175°F) | | **Electrical Conductivity** | ≈ 40-45% IACS (International Annealed Copper Standard) | | **Thermal Conductivity** | ≈ 120-140 W/m·K | | **Coefficient of Thermal Expansion** | ≈ 23.4 x 10⁻⁶/°C (20-100°C) | | **Modulus of Elasticity (E)** | ≈ 71 GPa (10.3 x 10⁶ psi) | --- #### **3. Mechanical Properties (Typical for T651 Temper)** The T651 temper (solution heat-treated, stress-relieved by stretching, and artificially aged to peak strength) is common for plate and extruded products. | Property | Typical Value | | :--- | :--- | | **Tensile Strength (Ultimate)** | 510 - 550 MPa (74 - 80 ksi) | | **Tensile Yield Strength (0.2% Offset)** | 440 - 480 MPa (64 - 70 ksi) | | **Elongation (in 50 mm / 2 in)** | 10 - 13 % | | **Hardness (Brinell)** | ≈ 145 HB | --- #### **4. Product Applications** 7046 Aluminum Alloy is used in demanding applications that require a high strength-to-weight ratio and good damage tolerance. * **Aerospace Industry:** * Aircraft wing ribs and spars * Fuselage stringers and frames * Seats and other internal structures * Spacecraft structural components * **High-Performance Automotive & Racing:** * Chassis components * Suspension parts (A-arms, uprights) * Space frames and roll cages * **Other High-Strength Applications:** * High-performance bicycle frames * Critical components in robotics --- #### **5. International Standards** 7046 alloy is recognized and specified by several major international standards organizations. The exact designation and specifications may vary. | Standard Body | Alloy Designation | Common Forms | Relevant Standard | | :--- | :--- | :--- | :--- | | **Aluminum Association (AA)** | **7046** | Sheet, Plate, Extruded Products | AA Teal Sheets / ANSI H35.1 | | **ASTM International** | **Aluminum 7046** | Plate, Sheet, Extrusions | ASTM B209 (Sheet/Plate), ASTM B221 (Extruded Bars, Rods, Profiles) | | **Aerospace (AMS)** | **7046** | Plate, Extrusions | AMS 4342 (Plate) | | **European Norm (EN)** | **EN AW-7046** | Wrought Products | EN 485-2 (Sheet/Plate), EN 755-2 (Extruded Products) | | **Unified Numbering System (UNS)** | **A97046** | - | SAE J1086 | --- #### **Key Advantages & Summary** * **High Strength:** Offers strength comparable to or exceeding that of 7075 alloy in certain tempers. * **Good Toughness:** Provides excellent resistance to crack propagation. * **Improved Stress Corrosion Cracking Resistance:** A key advantage over some other high-strength 7xxx alloys, making it suitable for thicker sections. * **Excellent Machinability:** In the T6-type temper, it machines to a good surface finish. * **Weldability:** Can be welded using friction stir welding (FSW) techniques, though arc welding is generally not recommended due to susceptibility to hot cracking. In conclusion, **7046 Aluminum Alloy** is a premium, high-performance material designed for the most demanding structural applications. Its balanced composition delivers an optimal mix of strength, damage tolerance, and corrosion resistance, making it a trusted choice in the aerospace and motorsport sectors worldwide.

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 2140 gallon liquid totes Special package is available on request.