6069-T6 Aluminum alloy,Aluminum 6069-T6 alloy,Hot Hollow Extrusion,E FORU

### **Aluminum 6069-T6 Alloy: Hot Hollow Extrusion Product Introduction** **Overview** Aluminum 6069-T6 is a high-strength aluminum-magnesium-silicon alloy supplied in the solution heat-treated and artificially aged condition, specifically manufactured using **hot hollow extrusion** technology. This advanced manufacturing process produces seamless hollow profiles with **excellent structural integrity** and **superior mechanical properties**. The T6 temper provides the **maximum practical strength** for this alloy, making it ideal for critical structural applications requiring high strength-to-weight ratios and reliable performance. --- #### **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** | 40-44% IACS | 40-44% 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** | 68.9 GPa | 10,000 ksi | --- #### **3. Mechanical Properties** **Typical Mechanical Properties for 6069-T6 Hot Hollow Extrusion:** | Property | Metric Value | Imperial Value | |----------|--------------|----------------| | **Tensile Strength** | 350-380 MPa | 51-55 ksi | | **Yield Strength (0.2% Offset)** | 310-340 MPa | 45-49 ksi | | **Elongation (in 50mm)** | 10-14% | 10-14% | | **Hardness (Brinell)** | 95-105 HB | 95-105 HB | | **Shear Strength** | 210-230 MPa | 30-33 ksi | | **Fatigue Strength** | 120-140 MPa | 17-20 ksi | | **Compressive Yield Strength** | 310-340 MPa | 45-49 ksi | --- #### **4. International Standards** * **ASTM Standards:** * ASTM B221: Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes * ASTM B241: Standard Specification for Aluminum and Aluminum-Alloy Seamless Pipe and Seamless Extruded Tube * **European Standards (EN):** * EN 573-3: Chemical composition * EN 755-2: Mechanical properties for extruded products * EN 755-3: Tolerances 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. Hot Hollow Extrusion Process** **Manufacturing Characteristics:** - **Extrusion Temperature:** 450-500°C (842-932°F) - **Extrusion Ratio:** 15:1 to 40:1 - **Wall Thickness Range:** 3-25 mm (0.12-1.0 inch) - **Profile Complexity:** Medium to high complexity hollow sections - **Surface Quality:** Excellent with minimal die lines **Heat Treatment Process:** 1. **Solution Heat Treatment:** 530-540°C (986-1004°F) 2. **Quenching:** Controlled water quenching 3. **Artificial Aging:** 165-175°C (329-347°F) for 8-12 hours --- #### **6. Product Applications** **Aerospace and Defense:** - Aircraft structural tubing - Missile body sections - Helicopter rotor components - Space vehicle structural members **Transportation Industry:** - Automotive safety cage components - Truck and bus structural frames - Railway vehicle structural members - Racing vehicle chassis components **Industrial Equipment:** - Hydraulic cylinder barrels - Pneumatic system components - Machinery structural frames - Material handling equipment **Specialized Applications:** - High-pressure fluid transfer systems - Structural support columns - Architectural structural elements - Sports equipment frames --- #### **7. Key Characteristics & Advantages** * **High Strength-to-Weight Ratio:** Superior mechanical properties with lightweight characteristics * **Excellent Structural Efficiency:** Hollow sections provide optimal stiffness-to-weight ratio * **Good Corrosion Resistance:** Maintains aluminum's inherent corrosion resistance * **Superior Fatigue Performance:** Excellent resistance to cyclic loading conditions * **Seamless Construction:** No welds or joints in the extrusion direction * **Excellent Surface Quality:** Smooth internal and external surfaces * **Good Machinability:** Can be machined to precise tolerances --- #### **8. Processing and Fabrication** **Machining Characteristics:** - Good machinability with carbide tooling - Suitable for precision machining operations - Good surface finish achievable - Requires appropriate cutting parameters **Forming Limitations:** - Limited formability in T6 condition - Suitable only for minor straightening - Specialized equipment required for any forming - High springback characteristics **Joining Methods:** - Good weldability using TIG and MIG methods - Requires qualified welding procedures - Mechanical joining preferred for critical applications - Adhesive bonding suitable for some applications **Surface Treatment Compatibility:** - Excellent for anodizing applications - Suitable for powder coating - Chemical conversion coatings applicable - Good paint adhesion characteristics --- #### **9. Quality Assurance** **Testing Requirements:** - Comprehensive mechanical property testing - Ultrasonic testing for internal defects - Dimensional accuracy verification - Surface quality inspection - Chemical composition analysis **Certification:** - Mill test certificates per international standards - Non-destructive testing certification - Process control documentation - Full traceability records --- **Technical Note:** Aluminum 6069-T6 hot hollow extrusion represents a premium manufacturing solution for applications requiring high strength, lightweight structural efficiency, and reliable performance. The hot hollow extrusion process creates seamless profiles with uniform mechanical properties throughout the cross-section, eliminating potential weak points associated with welded or joined structures. This combination of advanced manufacturing technology and optimized alloy chemistry makes 6069-T6 hollow extrusions particularly valuable for critical applications in aerospace, transportation, and high-performance industrial equipment where structural integrity and weight savings are paramount.

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 2018 gallon liquid totes Special package is available on request.