6069-T4 Aluminum alloy,Aluminum 6069-T4 alloy,E FORU

### **Aluminum 6069-T4 Alloy: Product Introduction** **Overview** Aluminum 6069-T4 is a heat-treatable aluminum-magnesium-silicon alloy in the solution heat-treated and naturally aged condition. This temper provides an excellent balance between **high strength and good formability**, offering **enhanced mechanical properties** while maintaining adequate ductility for subsequent forming operations. The T4 condition represents an optimal intermediate state for components that require fabrication after heat treatment before reaching their final strength through artificial aging. --- #### **1. Chemical Composition (Weight %)** | Element | Minimum (%) | Maximum (%) | |---------|-------------|-------------| | Silicon (Si) | 0.6 | 1.2 | | Iron (Fe) | - | 0.35 | | Copper (Cu) | 0.25 | 0.45 | | Manganese (Mn) | 0.20 | 0.40 | | Magnesium (Mg) | 0.8 | 1.2 | | Chromium (Cr) | 0.10 | 0.20 | | Zinc (Zn) | - | 0.10 | | Titanium (Ti) | - | 0.10 | | Other (Each) | - | 0.05 | | Other (Total) | - | 0.15 | | **Aluminum (Al)** | **Balance** | | --- #### **2. Physical Properties** | Property | Metric Value | Imperial Value | |----------|--------------|----------------| | **Density** | 2.70 g/cm³ | 0.0975 lb/in³ | | **Melting Range** | 580-650 °C | 1076-1202 °F | | **Electrical Conductivity** | 42-46% IACS | 42-46% IACS | | **Thermal Conductivity** | 165-180 W/m·K | 957-1045 BTU·in/(hr·ft²·°F) | | **Coefficient of Thermal Expansion** | 23.6 × 10⁻⁶/°C | 13.1 × 10⁻⁶/°F | | **Modulus of Elasticity** | 68.9 GPa | 10,000 ksi | --- #### **3. Mechanical Properties** **Typical Mechanical Properties for 6069-T4:** | Property | Metric Value | Imperial Value | |----------|--------------|----------------| | **Tensile Strength** | 240-280 MPa | 35-41 ksi | | **Yield Strength (0.2% Offset)** | 140-180 MPa | 20-26 ksi | | **Elongation (in 50mm)** | 14-18% | 14-18% | | **Hardness (Brinell)** | 70-80 HB | 70-80 HB | | **Shear Strength** | 160-190 MPa | 23-28 ksi | | **Fatigue Strength** | 95-115 MPa | 14-17 ksi | --- #### **4. International Standards** * **ASTM Standards:** * ASTM B221: Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes * ASTM B211: Standard Specification for Aluminum and Aluminum-Alloy Bar, Rod, and Wire * **European Standards (EN):** * EN 573-3: Chemical composition * EN 755-2: Mechanical properties for extruded products * **ISO Standards:** * ISO 6361-2: Wrought aluminum and aluminum alloy sheets, strips and plates * ISO 6362-2: Wrought aluminum and aluminum alloy extruded rods/bars, tubes and profiles --- #### **5. Product Applications** **Aerospace Components:** - Aircraft structural elements requiring post-forming - Wing and fuselage components before final aging - Aerospace brackets and fittings - Interior structural members **Transportation Industry:** - Automotive structural components - Truck and trailer structural members - Railway vehicle components - Vehicle framing elements **Industrial Applications:** - Machinery components requiring post-heat treatment forming - Equipment frames and supports - Structural components for further processing - Heavy-duty industrial parts **Marine and Defense:** - Marine structural components - Defense equipment elements - Naval vessel components - Military vehicle parts --- #### **6. Key Characteristics & Advantages** * **High Strength-to-Weight Ratio:** Excellent mechanical properties with lightweight characteristics * **Good Formability:** Maintains adequate ductility for forming operations after solution treatment * **Age-Hardenable:** Can be artificially aged to T6 temper for maximum strength * **Good Corrosion Resistance:** Maintains aluminum's inherent corrosion resistance * **Excellent Weldability:** All common welding methods can be successfully employed * **Good Machinability:** Can be machined using standard techniques * **Stable Properties:** Natural aging provides consistent mechanical characteristics --- #### **7. Heat Treatment and Aging Characteristics** **Solution Heat Treatment:** - Temperature: 530-540°C (986-1004°F) - Time: 30-45 minutes depending on thickness - Quenching: Rapid water quenching **Natural Aging:** - Occurs at room temperature - Reaches substantial stability in 4-10 days - Provides stable mechanical properties for fabrication **Artificial Aging Potential (to T6):** - Temperature: 165-175°C (329-347°F) - Time: 8-12 hours - Final Strength: 350-380 MPa tensile strength --- #### **8. Processing and Fabrication** **Forming Characteristics:** - Good for bending and moderate forming operations - Suitable for stretch forming applications - Adequate for roll forming processes - Moderate springback characteristics **Machining Properties:** - Good machinability in T4 condition - Better chip control than annealed temper - Good surface finish achievable - Suitable for precision machining operations **Joining Methods:** - Excellent weldability using TIG and MIG methods - Good for resistance welding applications - Suitable for adhesive bonding - Mechanical fastening easily accomplished **Surface Treatment Compatibility:** - Good for anodizing after final heat treatment - Suitable for various coating applications - Good surface preparation characteristics - Maintains integrity with proper treatment --- #### **9. Quality Assurance** **Testing and Verification:** - Mechanical property testing - Chemical composition analysis - Microstructural examination - Surface quality inspection **Certification:** - Mill test certificates per international standards - Process control documentation - Traceability records - Compliance with industry specifications --- **Technical Note:** Aluminum 6069-T4 offers a superior combination of strength and formability, serving as an ideal intermediate condition for components that require fabrication after solution heat treatment. The natural aging process provides stable mechanical properties that are sufficient for most manufacturing operations while allowing for subsequent artificial aging to achieve maximum strength. This temper is particularly valuable for applications where complex shapes must be formed after heat treatment, with the final strength properties developed through controlled aging processes. The balanced characteristics of 6069-T4 make it suitable for demanding applications across aerospace, transportation, and industrial sectors where both formability and high strength potential are required.

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 2017 gallon liquid totes Special package is available on request.