6066-O Aluminum alloy,Aluminum 6066-O alloy,E FORU

### **Aluminum 6066-O Alloy: Product Introduction** **Overview** Aluminum 6066-O is the annealed temper of the 6066 aluminum alloy, a high-strength Al-Mg-Si-Cu alloy known for its enhanced mechanical properties compared to other 6xxx series alloys. In the "O" (annealed) condition, the alloy is in its **softest state**, offering **maximum ductility and formability** while maintaining the excellent corrosion resistance characteristics of the 6066 series. This temper is specifically designed for applications requiring **severe forming operations** before the material undergoes final heat treatment to achieve its high-strength potential. --- #### **1. Chemical Composition (Weight %)** | Element | Minimum (%) | Maximum (%) | Notes | |---------|-------------|-------------|-------| | Silicon (Si) | 0.9 | 1.8 | Higher silicon content for enhanced strength potential | | Iron (Fe) | - | 0.50 | Impurity control | | Copper (Cu) | 0.7 | 1.2 | Higher copper content for strength enhancement | | Manganese (Mn) | 0.6 | 1.0 | Enhanced manganese for improved strength | | Magnesium (Mg) | 0.8 | 1.4 | Higher magnesium for strength development | | Chromium (Cr) | - | 0.40 | Corrosion resistance improvement | | Zinc (Zn) | - | 0.20 | Impurity control | | Titanium (Ti) | - | 0.20 | Grain refiner | | Other (Each) | - | 0.05 | - | | Other (Total) | - | 0.15 | - | | **Aluminum (Al)** | **Balance** | | | --- #### **2. Physical Properties** | Property | Metric Value | Imperial Value | |----------|--------------|----------------| | **Density** | 2.72 g/cm³ | 0.0982 lb/in³ | | **Melting Range** | 555-650 °C | 1031-1202 °F | | **Electrical Conductivity** | 40-45% IACS | 40-45% IACS | | **Thermal Conductivity** | 155-170 W/m·K | 900-985 BTU·in/(hr·ft²·°F) | | **Coefficient of Thermal Expansion** | 23.2 × 10⁻⁶/°C | 12.9 × 10⁻⁶/°F | | **Modulus of Elasticity** | 69.0 GPa | 10,007 ksi | --- #### **3. Mechanical Properties** **Typical Mechanical Properties for 6066-O:** | Property | Metric Value | Imperial Value | |----------|--------------|----------------| | **Tensile Strength** | 130-170 MPa | 19-25 ksi | | **Yield Strength (0.2% Offset)** | 55-95 MPa | 8-14 ksi | | **Elongation (in 50mm)** | 18-25% | 18-25% | | **Hardness (Brinell)** | 40-50 HB | 40-50 HB | | **Shear Strength** | 85-115 MPa | 12-17 ksi | | **Fatigue Strength** | 60-80 MPa | 9-12 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** **Complex Forming Applications:** - Deep drawn components requiring severe deformation - Complex stamped parts - Spin-formed components - Heavy formed structural elements **Aerospace Pre-forms:** - Aircraft structural components before heat treatment - Complex shaped aerospace parts - Pre-forms for high-strength applications **Transportation Components:** - Automotive structural pre-forms - Heavy vehicle components before final treatment - Complex shaped transportation parts **Industrial Applications:** - Machinery components requiring severe forming - Heavy equipment pre-forms - Complex industrial parts before heat treatment --- #### **6. Key Characteristics & Advantages** * **Excellent Formability**: Maximum ductility for severe forming operations * **High Strength Potential**: Can be heat treated to achieve tensile strength over 395 MPa (57 ksi) * **Good Corrosion Resistance**: Maintains aluminum's inherent corrosion resistance * **Superior Workability**: Ideal for complex fabrication processes * **Excellent Weldability**: All common welding methods can be employed * **Good Machinability**: Easy to machine in annealed condition * **Heat Treatable**: Can be solution treated and aged to T6 temper for high strength --- #### **7. Heat Treatment Potential** **After Forming Heat Treatment Sequence:** 1. **Solution Heat Treatment**: 525-535°C (977-995°F) 2. **Quenching**: Rapid water quenching 3. **Artificial Aging**: 155-165°C (311-329°F) for 8-12 hours **Final T6 Properties After Heat Treatment:** - Tensile Strength: 395-430 MPa (57-62 ksi) - Yield Strength: 360-395 MPa (52-57 ksi) - Elongation: 8-12% --- #### **8. Processing and Fabrication** **Forming Characteristics:** - Excellent for deep drawing operations - Suitable for severe bending and forming - Minimal springback characteristics - Good for stretch forming and spinning **Machining Properties:** - Excellent machinability in annealed condition - Good surface finish achievable - Easy chip formation - Suitable for high-speed machining **Joining Methods:** - Excellent weldability using TIG and MIG methods - Good for resistance welding - Suitable for brazing and soldering - Mechanical fastening easily accomplished **Surface Treatment Compatibility:** - Good for anodizing after 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 - Formability testing - Surface quality inspection **Certification:** - Mill test certificates per international standards - Process documentation - Traceability records - Quality compliance certification --- **Technical Note:** Aluminum 6066-O serves as the fundamental starting condition for manufacturing complex components that require severe forming operations before achieving final high-strength properties through heat treatment. The alloy's enhanced chemistry, with higher copper, silicon, and magnesium content compared to standard 6061, provides the potential for significantly higher final strength after T6 treatment. This makes 6066-O particularly valuable for applications where complex shapes must be formed first, then heat treated to achieve the high strength levels required for demanding structural applications in aerospace, transportation, and heavy industry.

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 2012 gallon liquid totes Special package is available on request.