6070-O Aluminum alloy,Aluminum 6070-O alloy,E FORU

### **Aluminum 6070-O Alloy: Product Introduction** **Overview** Aluminum 6070-O is the annealed temper of the 6070 aluminum alloy, a high-strength Al-Mg-Si alloy known for its excellent combination of strength and extrudability. In the "O" (annealed) condition, the alloy is in its **softest state**, offering **maximum ductility and formability** while maintaining good corrosion resistance. 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 (%) | |---------|-------------|-------------| | Silicon (Si) | 1.0 | 1.7 | | Iron (Fe) | - | 0.50 | | Copper (Cu) | 0.15 | 0.40 | | Manganese (Mn) | 0.40 | 1.0 | | Magnesium (Mg) | 0.50 | 1.2 | | Chromium (Cr) | 0.10 | 0.30 | | Zinc (Zn) | - | 0.25 | | Titanium (Ti) | - | 0.15 | | 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** | 44-48% IACS | 44-48% IACS | | **Thermal Conductivity** | 165-180 W/m·K | 957-1045 BTU·in/(hr·ft²·°F) | | **Coefficient of Thermal Expansion** | 23.4 × 10⁻⁶/°C | 13.0 × 10⁻⁶/°F | | **Modulus of Elasticity** | 69.0 GPa | 10,007 ksi | --- #### **3. Mechanical Properties** **Typical Mechanical Properties for 6070-O:** | Property | Metric Value | Imperial Value | |----------|--------------|----------------| | **Tensile Strength** | 140-180 MPa | 20-26 ksi | | **Yield Strength (0.2% Offset)** | 70-110 MPa | 10-16 ksi | | **Elongation (in 50mm)** | 16-22% | 16-22% | | **Hardness (Brinell)** | 45-55 HB | 45-55 HB | | **Shear Strength** | 95-125 MPa | 14-18 ksi | | **Fatigue Strength** | 70-90 MPa | 10-13 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** **Heavy-Duty Structural Applications:** - Truck and trailer frame components - Railway vehicle structural members - Bridge and infrastructure components - Heavy equipment structural elements **Transportation Industry:** - Automotive structural reinforcements - Bus and coach structural components - Heavy vehicle chassis elements - Transportation equipment frames **Industrial Applications:** - Crane and lifting equipment components - Material handling system structures - Heavy machinery frames - Industrial platform components **Construction and Architecture:** - Heavy structural supports - Building framework components - Architectural structural elements - Bridge railings and supports --- #### **6. Key Characteristics & Advantages** * **Excellent Formability:** Maximum ductility for severe forming operations * **High Strength Potential:** Can be heat treated to achieve tensile strength over 380 MPa (55 ksi) * **Good Corrosion Resistance:** Maintains adequate corrosion resistance in various environments * **Superior Extrudability:** Can be extruded into complex structural shapes * **Excellent Weldability:** All common welding methods can be successfully 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:** 530-545°C (986-1013°F) 2. **Quenching:** Rapid water quenching 3. **Artificial Aging:** 160-175°C (320-347°F) for 8-12 hours **Final T6 Properties After Heat Treatment:** - Tensile Strength: 380-420 MPa (55-61 ksi) - Yield Strength: 350-380 MPa (51-55 ksi) - Elongation: 8-12% --- #### **8. Processing and Fabrication** **Forming Characteristics:** - Excellent for heavy forming operations - Suitable for bending and shaping complex parts - Minimal springback characteristics - Good for stretch forming and deep drawing **Machining Properties:** - Good machinability in annealed condition - Smooth surface finish achievable - Easy chip formation and disposal - Suitable for various 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 - Formability testing and verification - Surface quality inspection - Dimensional accuracy checks **Certification and Documentation:** - Mill test certificates per international standards - Process control documentation - Full traceability records - Quality compliance certification - Third-party inspection reports available --- **Technical Note:** Aluminum 6070-O serves as an excellent starting condition for manufacturing heavy-duty structural components that require significant forming operations before achieving final high-strength properties through heat treatment. The alloy's enhanced chemistry, with higher silicon and manganese content compared to standard 6061 alloy, provides the foundation for superior final strength after T6 treatment. This makes 6070-O particularly valuable for applications in transportation and heavy industry where complex shapes must be formed first, then heat treated to achieve the high strength levels required for demanding structural applications. The annealed condition ensures maximum workability for heavy forming operations while setting the stage for exceptional final properties after proper thermal processing.

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 2020 gallon liquid totes Special package is available on request.