6111 Aluminum alloy,Aluminum 6111 alloy,E FORU

### **Aluminum 6111 Alloy: Product Introduction** **Overview** Aluminum 6111 is a high-strength, 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 particularly suitable for automotive outer body panels where both structural performance and aesthetic appearance are critical requirements. --- #### **1. Chemical Composition (Weight %)** | Element | Minimum (%) | Maximum (%) | |---------|-------------|-------------| | Silicon (Si) | 0.6 | 1.1 | | Iron (Fe) | - | 0.40 | | Copper (Cu) | 0.50 | 0.9 | | Manganese (Mn) | 0.10 | 0.45 | | Magnesium (Mg) | 0.50 | 1.0 | | Chromium (Cr) | - | 0.10 | | Zinc (Zn) | - | 0.15 | | Titanium (Ti) | - | 0.10 | | Other (Each) | - | 0.05 | | Other (Total) | - | 0.15 | | **Aluminum (Al)** | **Balance** | | --- #### **2. Physical Properties** | Property | Metric Value | Imperial Value | |----------|--------------|----------------| | **Density** | 2.71 g/cm³ | 0.0979 lb/in³ | | **Melting Range** | 555-650 °C | 1031-1202 °F | | **Electrical Conductivity** | 42-46% IACS | 42-46% IACS | | **Thermal Conductivity** | 160-175 W/m·K | 930-1015 BTU·in/(hr·ft²·°F) | | **Coefficient of Thermal Expansion** | 23.6 × 10⁻⁶/°C | 13.1 × 10⁻⁶/°F | | **Modulus of Elasticity** | 69.0 GPa | 10,007 ksi | --- #### **3. Mechanical Properties** **Typical Mechanical Properties by Temper:** | Property | T4 Temper | T4P Temper | T6 Temper | |----------|-----------|------------|-----------| | **Tensile Strength** | 240-280 MPa | 190-230 MPa | 290-330 MPa | | **Yield Strength (0.2% Offset)** | 130-160 MPa | 100-130 MPa | 250-280 MPa | | **Elongation (in 50mm)** | 24-28% | 26-30% | 12-16% | | **Hardness (Brinell)** | 70-80 HB | 60-70 HB | 90-100 HB | | **n-value (Strain Hardening Exponent)** | 0.23-0.27 | 0.25-0.29 | - | | **r-value (Plastic Strain Ratio)** | 0.60-0.70 | 0.65-0.75 | - | --- #### **4. International Standards** * **ASTM Standards:** * ASTM B209: Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate * ASTM B928: Standard Specification for High Magnesium Aluminum-Alloy Sheet and Plate for Marine Service * **European Standards (EN):** * EN 573-3: Chemical composition (Designation: EN AW-6111) * EN 485-2: Mechanical properties * **ISO Standards:** * ISO 6361-2: Wrought aluminum and aluminum alloy sheets, strips and plates * ISO 7771: Aluminum and aluminum alloys - Sheet, strip and plate * **Japanese Standards:** * JIS H4000: Aluminum and aluminum alloy sheets and plates * JIS H4080: Aluminum and aluminum alloy sheets and strips for automobiles --- #### **5. Product Applications** **Automotive Body Panels:** - Outer body panels (doors, hoods, fenders) - Roof panels and quarter panels - Deck lids and liftgates - Body side panels **Automotive Structural Components:** - Body-in-white components - Structural reinforcements - Crash management components - Chassis elements **Transportation Industry:** - Truck body panels - Bus exterior components - Railway vehicle body panels - Commercial vehicle components **Special Applications:** - High-quality painted components - Class-A surface applications - Architectural panels requiring high strength - Premium consumer products --- #### **6. Key Characteristics & Advantages** * **Excellent Bake Hardening Response:** Significant strength increase after paint baking cycle * **Good Formability:** High elongation for complex stamping operations * **Superior Surface Quality:** Excellent for Class-A automotive surfaces * **High Strength-to-Weight Ratio:** Weight reduction potential for automotive applications * **Good Corrosion Resistance:** Suitable for automotive environmental conditions * **Excellent Hemming Performance:** Good for edge hemming operations * **Weldability:** Compatible with automotive welding processes --- #### **7. Heat Treatment Characteristics** **Solution Heat Treatment:** - Temperature: 540-550°C (1004-1022°F) - Time: Rapid heating and short holding times - Quenching: Rapid cooling required **Paint Bake Cycle Response:** - Typical bake cycle: 170-185°C (338-365°F) for 20-30 minutes - Strength increase: 60-100 MPa yield strength improvement - Final properties achieved after painting process --- #### **8. Processing and Fabrication** **Stamping Characteristics:** - Excellent deep drawing capability - Good stretch formability - Moderate springback characteristics - Suitable for complex geometries **Surface Treatment Compatibility:** - Excellent phosphating response - Good electrocoating performance - Superior paint adhesion - Suitable for various coating systems **Joining Methods:** - Resistance spot welding compatible - MIG and TIG welding applicable - Adhesive bonding suitable - Mechanical fastening possible **Hemming Performance:** - Excellent for tight radius hems - Good for flat hems - Minimal edge cracking - Consistent performance --- #### **9. Quality Assurance** **Testing Requirements:** - Mechanical property testing - Formability testing (n-value, r-value) - Surface quality inspection - Bake hardening response verification - Corrosion testing **Automotive Standards:** - Meets automotive OEM specifications - Surface quality standards compliance - Dimensional stability requirements - Batch-to-batch consistency --- **Technical Note:** Aluminum 6111 is specifically engineered for automotive body sheet applications where the combination of high strength after paint baking and excellent formability in the T4 temper is essential. The alloy's unique characteristic is its ability to be formed in the relatively soft T4 condition and then gain significant strength during the automotive paint bake cycle, resulting in excellent dent resistance in service. This makes 6111 particularly valuable for automotive outer body panels where both complex formability requirements and high in-service strength are needed. The alloy's superior surface quality and consistent performance have made it a preferred choice for high-quality automotive applications 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 2044 gallon liquid totes Special package is available on request.