6201-T81 Aluminum alloy,Aluminum 6201-T81 alloy,E FORU

### **Aluminum 6201-T81 Alloy: Product Introduction** **Overview** Aluminum 6201-T81 is a high-strength aluminum-magnesium-silicon alloy supplied in the solution heat-treated, cold worked, and artificially aged condition. This specialized temper is specifically designed for **electrical conductor applications** requiring **enhanced mechanical properties** while maintaining good electrical conductivity. The T81 treatment provides **superior strength characteristics** compared to standard T6 temper, making it ideal for high-performance electrical transmission applications. --- #### **1. Chemical Composition (Weight %)** | Element | Minimum (%) | Maximum (%) | |---------|-------------|-------------| | Silicon (Si) | 0.50 | 0.9 | | Iron (Fe) | - | 0.50 | | Copper (Cu) | - | 0.10 | | Manganese (Mn) | - | 0.03 | | Magnesium (Mg) | 0.6 | 0.9 | | Chromium (Cr) | - | 0.03 | | Zinc (Zn) | - | 0.10 | | Titanium (Ti) | - | 0.03 | | Other (Each) | - | 0.03 | | Other (Total) | - | 0.10 | | **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** | 53-57% IACS | 53-57% IACS | | **Thermal Conductivity** | 185-200 W/m·K | 1070-1160 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 6201-T81:** | Property | Metric Value | Imperial Value | |----------|--------------|----------------| | **Tensile Strength** | 330-370 MPa | 48-54 ksi | | **Yield Strength (0.2% Offset)** | 300-340 MPa | 44-49 ksi | | **Elongation (in 50mm)** | 6-10% | 6-10% | | **Hardness (Brinell)** | 105-115 HB | 105-115 HB | | **Shear Strength** | 210-240 MPa | 30-35 ksi | | **Fatigue Strength** | 130-150 MPa | 19-22 ksi | --- #### **4. International Standards** * **IEC Standards:** * IEC 60104: Aluminum-magnesium-silicon alloy wire for overhead line conductors * IEC 60889: Hard-drawn aluminum wire for overhead line conductors * IEC 62004: Thermal-resistant aluminum alloy wire for overhead line conductor * **ASTM Standards:** * ASTM B396: Standard Specification for Aluminum-Alloy 6101-T61 and 6101-T63 Extruded Round Tube for Electrical Purposes * **European Standards (EN):** * EN 573-3: Chemical composition * EN 754-2: Mechanical properties for drawn bars and tubes --- #### **5. Product Applications** **High-Strength Electrical Transmission:** - Extra high voltage transmission conductors - All Aluminum Alloy Conductors (AAAC) for heavy loading conditions - Long-span transmission lines - Mountainous terrain power lines **Special Applications:** - High-strength messenger cables - Guy wires for transmission towers - Overhead ground wires - Coastal and high-wind area power lines **Electrical Infrastructure:** - High-strength bus bar systems - Electrical connector systems - Power distribution hardware - Substation components **Industrial Applications:** - High-strength electrical windings - Power transformer components - Heavy-duty electrical fixtures - Specialized electrical machinery --- #### **6. Key Characteristics & Advantages** * **Enhanced Mechanical Strength:** Superior strength compared to T6 temper * **Good Electrical Conductivity:** Maintains adequate conductivity for electrical applications * **Improved Fatigue Resistance:** Enhanced performance under cyclic loading * **Superior Thermal Stability:** Better performance at elevated temperatures * **Excellent Creep Resistance:** Reduced deformation under sustained load * **Good Corrosion Resistance:** Adequate performance in various environments * **Reliable Performance:** Consistent mechanical and electrical properties --- #### **7. Heat Treatment Process** **Solution Heat Treatment:** - Temperature: 520-530°C (968-986°F) - Time: 30-60 minutes depending on thickness - Quenching: Rapid water quenching **Cold Working:** - Reduction: 5-15% cold working after solution treatment - Methods: Drawing, rolling, or other cold working processes **Artificial Aging:** - Temperature: 155-165°C (311-329°F) - Time: 10-14 hours - Cooling: Controlled air cooling --- #### **8. Processing and Fabrication** **Wire Drawing Characteristics:** - Requires specialized drawing equipment - Consistent mechanical properties - Good surface quality achievable - Suitable for high-strength conductor manufacturing **Machining Properties:** - Requires carbide tooling for optimal results - Good surface finish obtainable with proper parameters - Suitable for precision components - Higher cutting forces required **Forming Limitations:** - Very limited formability in T81 condition - Suitable only for minor straightening - High springback characteristics - Specialized equipment essential **Joining Methods:** - Weldable with qualified procedures - Mechanical connections preferred - Compression connectors suitable - Requires proper joint design --- #### **9. Quality Assurance** **Testing Requirements:** - Comprehensive mechanical property testing - Electrical conductivity verification - Chemical composition analysis - Microstructural examination - Fatigue and creep testing for critical applications **Certification:** - Mill test certificates per international standards - Electrical performance certification - Process control documentation - Full traceability records --- **Technical Note:** Aluminum 6201-T81 represents a specialized high-strength temper condition specifically developed for electrical conductor applications requiring enhanced mechanical properties. The combination of cold working and artificial aging provides superior strength characteristics compared to standard T6 temper, making it particularly valuable for high-performance electrical transmission applications where mechanical reliability is paramount. While the T81 treatment results in some reduction in electrical conductivity compared to T6 temper, the enhanced mechanical properties make this alloy ideal for applications such as long-span transmission lines, heavy loading conditions, and extreme environmental conditions where mechanical strength requirements outweigh the need for maximum electrical conductivity. This temper is especially valuable for infrastructure projects where reliability and long-term performance are critical considerations.

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 2058 gallon liquid totes Special package is available on request.