6063-T831 Aluminum alloy,Aluminum 6063-T831 alloy,E FORU

### **Aluminum 6063-T831 Alloy: Product Introduction** **Overview** Aluminum 6063-T831 is a specialized temper of the 6063 aluminum-magnesium-silicon alloy that has undergone **solution heat treatment, stress-relieving by stretching, and artificial aging**. This specific temper designation indicates a **controlled sequence of thermal and mechanical treatments** designed to provide **enhanced dimensional stability and improved mechanical properties**. The T831 condition is particularly valuable for applications requiring **precise dimensional control** and **superior mechanical performance** in demanding environments. --- #### **1. Chemical Composition (Weight %)** | Element | Minimum (%) | Maximum (%) | |---------|-------------|-------------| | Silicon (Si) | 0.20 | 0.60 | | Iron (Fe) | - | 0.35 | | Copper (Cu) | - | 0.10 | | Manganese (Mn) | - | 0.10 | | Magnesium (Mg) | 0.45 | 0.90 | | Chromium (Cr) | - | 0.10 | | 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** | 615-655 °C | 1140-1210 °F | | **Electrical Conductivity** | 47-51% IACS | 47-51% IACS | | **Thermal Conductivity** | 165-180 W/m·K | 955-1045 BTU·in/(hr·ft²·°F) | | **Coefficient of Thermal Expansion** | 23.4 × 10⁻⁶/°C | 13.0 × 10⁻⁶/°F | | **Modulus of Elasticity** | 68.9 GPa | 10,000 ksi | --- #### **3. Mechanical Properties** **Typical Mechanical Properties for 6063-T831:** | Property | Metric Value | Imperial Value | |----------|--------------|----------------| | **Tensile Strength** | 240-270 MPa | 35-39 ksi | | **Yield Strength (0.2% Offset)** | 220-250 MPa | 32-36 ksi | | **Elongation (in 50mm)** | 5-8% | 5-8% | | **Hardness (Brinell)** | 88-98 HB | 88-98 HB | | **Shear Strength** | 155-175 MPa | 22-25 ksi | | **Fatigue Strength** | 98-115 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 B210: Standard Specification for Aluminum and Aluminum-Alloy Drawn Seamless Tubes * **European Standards (EN):** * EN 573-3: Chemical composition (Designation: EN AW-6063) * 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** **Precision Structural Components:** - High-precision architectural structures - Critical load-bearing components - Precision machinery frames - Instrumentation supports **Aerospace and Defense:** - Aircraft interior structural components - Missile and defense system parts - Satellite component supports - Military equipment frameworks **Transportation Industry:** - High-performance automotive structures - Railway precision components - Marine structural elements - Special vehicle frameworks **Industrial Applications:** - Precision machine tool components - Industrial automation system parts - High-accuracy measuring equipment - Specialized industrial machinery --- #### **6. Key Characteristics & Advantages** * **Enhanced Dimensional Stability:** Superior for precision applications requiring minimal distortion * **High Strength Properties:** Improved mechanical performance over standard T6 temper * **Excellent Stress Relief:** Minimized residual stresses for improved performance * **Good Corrosion Resistance:** Maintains aluminum's inherent corrosion resistance * **Superior Fatigue Performance:** Enhanced resistance to cyclic loading conditions * **Improved Machinability:** Better dimensional control during machining operations * **Good Thermal Stability:** Maintains properties under thermal variations --- #### **7. Heat Treatment Process** **Solution Heat Treatment:** - Temperature: 515-525°C (960-980°F) - Time: Controlled duration for complete solutionizing - Quenching: Rapid controlled quenching **Stress Relieving:** - Method: Controlled stretching (1-3% permanent set) - Equipment: Precision stretching machinery - Quality Control: Continuous monitoring **Artificial Aging:** - Temperature: 175-185°C (347-365°F) - Time: 6-10 hours - Process Control: Precise temperature and time parameters --- #### **8. Processing and Fabrication** **Machining Characteristics:** - Excellent dimensional stability during machining - Good surface finish achievable - Requires appropriate tooling and parameters - Minimal distortion during heavy machining **Forming Limitations:** - Limited formability due to high strength - Suitable only for minor adjustments - Specialized techniques required for any forming - Not recommended for severe forming operations **Joining Methods:** - Weldable with proper procedures - Requires qualified welding techniques - Post-weld heat treatment may be necessary - Mechanical fastening preferred for critical applications **Surface Treatment:** - Good anodizing response - Suitable for various coating applications - Maintains dimensional accuracy after treatment - Quality surface finish maintainable --- #### **9. Quality Assurance and Standards Compliance** **Testing Requirements:** - Comprehensive mechanical property testing - Chemical composition verification - Dimensional accuracy certification - Non-destructive testing as required - Microstructural examination **Certification and Documentation:** - Mill test certificates per international standards - Process control documentation - Full traceability records - Third-party inspection certificates - Compliance with industry-specific standards --- **Technical Note:** Aluminum 6063-T831 represents a premium engineering grade specifically designed for applications where dimensional stability and precise mechanical properties are critical. The stress-relieving process through stretching ensures minimal internal stresses, making this temper particularly suitable for components that undergo extensive machining or require high precision in final application. While it offers reduced formability compared to standard tempers, its enhanced stability and mechanical performance make it invaluable for critical applications in aerospace, precision instrumentation, and high-performance industrial equipment.

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 2006 gallon liquid totes Special package is available on request.