6091 Aluminum alloy,Aluminum 6091 alloy,E FORU

### **Aluminum 6091 Alloy: Product Introduction** **Overview** Aluminum 6091 is a heat-treatable aluminum-magnesium-silicon alloy that represents a specialized member of the 6xxx series aluminum alloys. Designed to offer **enhanced strength characteristics** and **improved thermal stability**, this alloy provides a unique combination of mechanical properties suitable for specialized applications. While less commonly used than some other 6xxx series alloys, 6091 offers reliable performance for specific engineering requirements where its particular property profile is advantageous. --- #### **1. Chemical Composition (Weight %)** | Element | Typical / Target (%) | Notes | |---------|---------------------|-------| | Silicon (Si) | 0.8 - 1.4 | Optimized for strength development | | Iron (Fe) | ≤ 0.40 | Controlled impurity | | Copper (Cu) | 0.10 - 0.30 | Moderate copper for strength enhancement | | Manganese (Mn) | 0.20 - 0.50 | Grain structure control | | Magnesium (Mg) | 0.6 - 1.0 | Balanced for Mg₂Si formation | | Chromium (Cr) | ≤ 0.20 | Corrosion resistance improvement | | Zinc (Zn) | ≤ 0.15 | Impurity control | | Titanium (Ti) | ≤ 0.10 | Grain refiner | | Other (Each) | ≤ 0.05 | - | | Other (Total) | ≤ 0.15 | - | | **Aluminum (Al)** | **Balance** | | --- #### **2. Physical Properties** | Property | Typical Metric Value | Imperial Value | |----------|---------------------|----------------| | **Density** | 2.70 g/cm³ | 0.0975 lb/in³ | | **Melting Range** | 580 - 650 °C | 1076 - 1202 °F | | **Electrical Conductivity** | 46-50% IACS | 46-50% IACS | | **Thermal Conductivity** | 170-185 W/m·K | 985-1070 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 by Temper:** | Property | T4 Temper | T6 Temper | |----------|-----------|-----------| | **Tensile Strength** | 230-270 MPa | 300-340 MPa | | **Yield Strength (0.2% Offset)** | 130-160 MPa | 260-290 MPa | | **Elongation (in 50mm)** | 14-18% | 10-14% | | **Hardness (Brinell)** | 70-80 HB | 90-100 HB | | **Shear Strength** | 160-190 MPa | 190-220 MPa | | **Fatigue Strength** | 95-115 MPa | 115-135 MPa | --- #### **4. International Standards** * **ASTM Standards:** * May be covered under general specifications like **ASTM B221** for extruded products * **ASTM B211** for bar, rod, and wire * **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 * **European Standards:** * **EN 573-3**: Chemical composition * **EN 755-2**: Mechanical properties for extruded products * **Other National Standards:** * **GB/T 3190** (China) * **JIS H4040** (Japan) --- #### **5. Product Applications** **Specialized Engineering Applications:** - Medium-strength structural components - Specialized machinery parts - Equipment frames and supports - Engineering prototypes **Transportation Components:** - Automotive structural elements - Truck and trailer components - Railway interior structures - Vehicle framing members **Industrial Equipment:** - Machinery components requiring thermal stability - Equipment requiring good strength-to-weight ratio - Industrial hardware components - Specialized tooling applications **General Manufacturing:** - Custom fabrications - Prototype development - Specialized structural elements - Engineering test components --- #### **6. Key Characteristics & Advantages** * **Good Strength-to-Weight Ratio**: Favorable mechanical properties with lightweight characteristics * **Excellent Thermal Stability**: Good performance at moderate temperatures * **Good Corrosion Resistance**: Adequate performance in various environments * **Heat Treatable**: Can be strengthened through solution treatment and aging * **Good Weldability**: Compatible with common welding methods * **Adequate Machinability**: Can be machined using standard techniques * **Reasonable Cost**: Economical choice for specialized applications --- #### **7. Heat Treatment Process** **Solution Heat Treatment:** - Temperature: 525-535°C (977-995°F) - Time: 30-45 minutes - Quenching: Water quenching **Artificial Aging (T6):** - Temperature: 165-175°C (329-347°F) - Time: 6-10 hours - Cooling: Air cooling --- #### **8. Processing Characteristics** **Extrusion Performance:** - Good for standard profile shapes - Reasonable extrusion speeds - Adequate surface quality - Suitable for general sections **Forming Operations:** - Good formability in T4 temper - Suitable for bending and shaping - Moderate springback characteristics - Adequate for most fabrication needs **Machining Properties:** - Fair to good machinability - Standard tooling applicable - Reasonable surface finish - Suitable for most operations **Joining Methods:** - Good TIG and MIG weldability - Suitable for brazing - Mechanical fastening easily accomplished - Adhesive bonding applicable --- #### **9. Quality and Standards Compliance** **Testing and Verification:** - Standard mechanical testing - Chemical composition verification - Surface quality inspection - Dimensional accuracy checks **Certification:** - Standard mill certification - Quality documentation available - Traceability maintained - Compliance with relevant standards --- **Technical Note:** Aluminum 6091 provides a specialized solution for applications requiring a specific balance of mechanical properties and thermal stability. While it may not offer the highest strength levels available in the 6xxx series, its balanced properties make it suitable for various specialized engineering applications. The alloy's good extrudability and corrosion resistance, combined with its heat-treatable nature, make it a practical choice for applications where specific performance requirements must be met without the need for premium alloy characteristics. As with many specialized alloys, consultation with material suppliers and thorough testing is recommended for critical applications to ensure the material meets specific performance requirements.

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 2028 gallon liquid totes Special package is available on request.