6151-O Aluminum alloy,Aluminum 6151-O alloy,E FORU

### **Aluminum 6151-O Alloy: Product Introduction** **Overview** Aluminum 6151-O is the annealed temper of the 6151 aluminum alloy, a heat-treatable aluminum-magnesium-silicon alloy known for its **good combination of strength and corrosion resistance**. In the "O" (annealed) condition, the alloy is in its **softest state**, offering **maximum ductility and formability** while maintaining the excellent corrosion resistance characteristics of the 6151 series. 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) | 0.6 | 1.2 | | Iron (Fe) | - | 1.0 | | Copper (Cu) | - | 0.35 | | Manganese (Mn) | - | 0.20 | | Magnesium (Mg) | 0.45 | 0.8 | | Chromium (Cr) | 0.15 | 0.35 | | 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** | 2.70 g/cm³ | 0.0975 lb/in³ | | **Melting Range** | 580-650 °C | 1076-1202 °F | | **Electrical Conductivity** | 46-50% IACS | 46-50% IACS | | **Thermal Conductivity** | 175-190 W/m·K | 1015-1100 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 6151-O:** | Property | Metric Value | Imperial Value | |----------|--------------|----------------| | **Tensile Strength** | 125-165 MPa | 18-24 ksi | | **Yield Strength (0.2% Offset)** | 55-95 MPa | 8-14 ksi | | **Elongation (in 50mm)** | 20-26% | 20-26% | | **Hardness (Brinell)** | 35-45 HB | 35-45 HB | | **Shear Strength** | 85-115 MPa | 12-17 ksi | | **Fatigue Strength** | 60-80 MPa | 9-12 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** **Complex Forming Applications:** - Deep drawn components - Complex stamped parts - Spin-formed components - Heavy formed structural elements **Forging Pre-forms:** - Forging blanks and pre-forms - Drop forging components - Closed die forging pre-forms - Upset forging applications **Automotive Components:** - Automotive structural pre-forms - Vehicle chassis components before heat treatment - Automotive brackets and fittings - Suspension component pre-forms **Industrial Applications:** - Machinery components requiring severe forming - Heavy equipment pre-forms - Complex industrial parts before heat treatment - Specialized tooling components --- #### **6. Key Characteristics & Advantages** * **Excellent Formability:** Maximum ductility for severe forming operations * **High Strength Potential:** Can be heat treated to achieve tensile strength over 330 MPa (48 ksi) * **Good Corrosion Resistance:** Maintains excellent corrosion resistance characteristics * **Superior Workability:** Ideal for complex fabrication processes including forging * **Excellent Weldability:** All common welding methods can be successfully employed * **Outstanding 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:** 525-535°C (977-995°F) 2. **Quenching:** Rapid water quenching 3. **Artificial Aging:** 155-165°C (311-329°F) for 8-12 hours **Final T6 Properties After Heat Treatment:** - Tensile Strength: 330-360 MPa (48-52 ksi) - Yield Strength: 295-325 MPa (43-47 ksi) - Elongation: 12-16% --- #### **8. Processing and Fabrication** **Forming Characteristics:** - Excellent for deep drawing operations - Suitable for severe bending and forming - Minimal springback characteristics - Good for stretch forming and spinning **Forging Characteristics:** - Excellent hot workability - Suitable for various forging processes - Good die filling characteristics - Consistent flow properties **Machining Properties:** - Excellent machinability in annealed condition - Good surface finish achievable - Easy chip formation and disposal - Suitable for high-speed machining operations **Joining Methods:** - Excellent weldability using TIG and MIG methods - Good for resistance welding applications - Suitable for brazing and soldering - Mechanical fastening easily accomplished --- #### **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 --- **Technical Note:** Aluminum 6151-O serves as the fundamental starting condition for manufacturing complex components that require severe forming operations, particularly forging, before achieving final high-strength properties through heat treatment. The alloy's enhanced chromium content provides improved stress corrosion resistance in the final heat-treated condition. This makes 6151-O particularly valuable for applications where complex shapes must be formed first, particularly through forging processes, then heat treated to achieve the high strength levels required for demanding structural applications in automotive, aerospace, and heavy industry. The combination of exceptional formability in the O temper and high strength potential after heat treatment makes this material highly versatile for demanding manufacturing processes, especially in forging applications where its hot workability characteristics are particularly advantageous.

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 2047 gallon liquid totes Special package is available on request.