6061A Aluminum alloy,Aluminum 6061A alloy,E FORU

### **6061A Aluminum Alloy: Product Introduction** **Overview** 6061A aluminum alloy is a European variant of the globally renowned 6061 alloy. It is a heat-treatable Al-Mg-Si alloy designed to offer a **favorable balance between strength, corrosion resistance, weldability, and extrudability**. The "A" designation typically indicates a modified chemical composition with tighter control on impurities and adjusted alloying elements, often resulting in **improved ductility and fracture toughness** compared to the standard 6061, making it particularly suitable for safety-critical applications. --- #### **1. Chemical Composition (Weight %)** The chemical composition of 6061A is precisely controlled, often with a lower maximum for iron and silicon to enhance formability and surface finish. | Element | Minimum (%) | Maximum (%) | Notes | | :--- | :--- | :--- | :--- | | Silicon (Si) | 0.40 | 0.8 | Balanced with Magnesium to form Mg₂Si. | | Iron (Fe) | - | 0.30 | Tighter control than some 6061 versions for better toughness. | | Copper (Cu) | 0.15 | 0.40 | Enhances strength; content is controlled. | | Manganese (Mn) | - | 0.15 | Kept low to maintain good extrudability. | | Magnesium (Mg) | 0.6 | 1.0 | Primary element for strength. | | Chromium (Cr) | 0.04 | 0.20 | Improves stress corrosion cracking resistance. | | Zinc (Zn) | - | 0.20 | Impurity. | | Titanium (Ti) | - | 0.10 | Grain refiner. | | Other (Each) | - | 0.05 | - | | Other (Total) | - | 0.15 | - | | **Aluminum (Al)** | **Balance** | | | --- #### **2. Physical Properties** The physical properties are very similar to standard 6061. | Property | Typical Metric Value | Imperial Value | | :--- | :--- | :--- | | **Density** | 2.70 g/cm³ | 0.0975 lb/in³ | | **Melting Range** | ~ 580 - 650 °C | ~ 1075 - 1200 °F | | **Electrical Conductivity** | ~ 50-55% IACS (T6 temper) | ~ 50-55% IACS | | **Thermal Conductivity** | ~ 170 - 190 W/m·K | ~ 990 - 1100 BTU·in/(hr·ft²·°F) | | **Coefficient of Thermal Expansion (20-100°C)** | 23.6 x 10⁻⁶ /°C | 13.1 x 10⁻⁶ /°F | --- #### **3. Mechanical Properties (Typical for T6 Temper)** 6061A is commonly used in the T6 temper (Solution Heat-Treated and Artificially Aged) for maximum strength. | Property | Metric Value (Typical) | Imperial Value (Typical) | | :--- | :--- | :--- | | **Tensile Strength** | 260 - 310 MPa | 38 - 45 ksi | | **Yield Strength (0.2% Offset)** | 240 - 280 MPa | 35 - 41 ksi | | **Elongation (in 50mm)** | 8 - 12 % | 8 - 12 % | | **Hardness (Brinell)** | ~ 90 - 100 HB | ~ 90 - 100 HB | **Note:** The key advantage of 6061A is often its enhanced elongation and toughness compared to standard 6061-T6, while maintaining similar strength levels. It also exhibits good machinability in the T6 temper. --- #### **4. International Standards** 6061A is primarily defined by European standards (EN), which have strict requirements for material properties in structural applications. * **EN (European Standards):** * **EN 573-3:** Chemical composition. The standard designation is **EN AW-6061A**. * **EN 755-2:** For extruded rods, bars, tubes, and profiles. * **EN 485-2:** For sheet and plate. * **ASTM (USA):** While "6061A" is not a standard ASTM designation, its properties are very similar and it is often considered interchangeable with **ASTM B221/B221M for 6061** extrusions for many applications, though chemical limits may differ slightly. * **ISO (International Organization for Standardization):** * **ISO 6361-2** (Wrought aluminum sheets/strips/plates) * **ISO 6362-2** (Wrought aluminum extruded products) --- #### **5. Product Application** Due to its balanced properties and enhanced toughness, 6061A is a preferred choice for demanding structural and transportation applications. * **Automotive and Transportation:** * **Chassis Components** * **Seat Frames and Side Impact Beams** * **Bumper Systems** * **Wheel Spiders** (where high ductility is critical for safety) * **Aerospace:** * **Non-critical aircraft structures** * **Interior Cabin Components** * **Fittings and Brackets** * **Marine:** * **Boat Hulls and Superstructures** * **Masts and Spars** * **Marine Hardware** * **General Engineering and Structures:** * **High-stress structural frames** * **Lifting equipment** * **Pressure Vessels** --- #### **6. Key Characteristics & Advantages** * **Enhanced Toughness and Ductility:** The primary advantage over standard 6061. The modified chemistry provides better resistance to crack propagation, making it ideal for impact-critical components. * **Good Strength-to-Weight Ratio:** Offers high strength comparable to many steels at a much lower weight. * **Excellent Corrosion Resistance:** Maintains the good general atmospheric and marine corrosion resistance characteristic of the 6xxx series. * **Very Good Weldability:** Can be readily welded using all common techniques, especially TIG and MIG welding. * **Good Extrudability and Formability:** Can be extruded into complex shapes and formed in the T4 temper before final aging to T6. * **Excellent Anodizing Response:** Responds well to anodizing, providing a durable, corrosion-resistant, and decorative surface finish. **Disclaimer:** The information provided is typical and for reference purposes. 6061A is specifically governed by EN standards, and its properties are guaranteed within the limits defined therein. For critical structural applications, especially in Europe, the relevant EN standards (EN 755-2, EN 485-2) must be consulted for definitive minimum property values. Always refer to the manufacturer's certified datasheet for procurement.

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 1989 gallon liquid totes Special package is available on request.