6351A Aluminum alloy,Aluminum 6351A alloy,E FORU

### **Aluminum 6351A Alloy (EN AW-6351A) - Product Introduction** **Aluminum 6351A** is a heat-treatable aluminum-magnesium-silicon alloy known for its excellent extrusion capabilities and good mechanical properties. This alloy is part of the 6xxx series and is particularly valued for its combination of medium to high strength, good corrosion resistance, and superior formability. The "A" designation indicates an improved version with better controlled composition for enhanced performance in structural applications. --- #### **1. Chemical Composition** The chemical composition is optimized for extrusion and mechanical performance: | Element | Content (%) (Typical) | Standard Range (EN) | |---|---|---| | **Aluminum (Al)** | Balance | Balance | | **Magnesium (Mg)** | 0.50 - 0.8 | 0.50 - 0.8 | | **Silicon (Si)** | 0.80 - 1.2 | 0.80 - 1.2 | | **Iron (Fe)** | ≤ 0.50 | ≤ 0.50 | | **Copper (Cu)** | ≤ 0.10 | ≤ 0.10 | | **Manganese (Mn)** | 0.50 - 0.9 | 0.50 - 0.9 | | **Chromium (Cr)** | ≤ 0.30 | ≤ 0.30 | | **Zinc (Zn)** | ≤ 0.20 | ≤ 0.20 | | **Titanium (Ti)** | ≤ 0.10 | ≤ 0.10 | | **Others (Each)** | ≤ 0.05 | ≤ 0.05 | | **Others (Total)** | ≤ 0.15 | ≤ 0.15 | *Note: The relatively high manganese content contributes to strength while maintaining good corrosion resistance.* --- #### **2. Physical Properties** Aluminum 6351A exhibits well-balanced physical properties: | Property | Metric Value | Imperial Value | |---|---|---| | **Density** | 2.71 g/cm³ | 0.0979 lb/in³ | | **Melting Range** | 580 - 650 °C | 1076 - 1202 °F | | **Electrical Conductivity** | 40-45 % IACS (T5 Temper) | 40-45 % IACS | | **Thermal Conductivity** | 170-185 W/m·K | 1180-1285 BTU·in/(hr·ft²·°F) | | **Coefficient of Thermal Expansion** | 23.5 × 10⁻⁶/K | 13.1 × 10⁻⁶/°F | | **Modulus of Elasticity** | 69 GPa | 10,000 ksi | --- #### **3. Mechanical Properties** Typical mechanical properties for common tempers: | Temper | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) | |---|---|---|---|---| | **T4** | 210-260 | 110-160 | 16-20 | 70-80 | | **T5** | 250-300 | 200-250 | 10-14 | 85-95 | | **T6** | 270-320 | 240-290 | 8-12 | 95-105 | | **T651** | 280-330 | 250-300 | 8-11 | 98-108 | --- #### **4. International Standards** Aluminum 6351A complies with the following international standards: * **European Standard (EN):** **EN AW-6351A** (Material Number 3.3207) * **ISO:** **AlMgSi** under ISO 209 * **EN 755:** Aluminum and aluminum alloy extruded rod/bar, tube and profiles * **EN 13957:** Aluminum and aluminum alloys - Extruded round, coiled and drawn wire * **EN 12020:** Aluminum and aluminum alloys - Extruded precision profiles * **EN 15088:** Aluminum and aluminum alloys - Structural products for construction works * **ASTM:** Related specifications in **ASTM B221** for general extrusion applications * **National Equivalents:** DIN 3.3207 (Germany), BS (UK) --- #### **5. Product Applications** Aluminum 6351A is widely used in various structural and engineering applications: * **Vehicle Chassis Components:** Truck and trailer structural members * **Architectural Structures:** Window frames, door frames, and structural glazing systems * **Marine Applications:** Boat frames and marine structures * **Bridge Components:** Pedestrian bridge railings and structural elements * **Industrial Equipment:** Machinery frames, conveyor systems, and structural supports * **Transportation:** Railway car components and automotive structural parts * **Construction:** Scaffolding systems and temporary structures * **Sporting Goods:** Bicycle frames and sports equipment components --- #### **6. Key Advantages & Characteristics** * **Excellent Extrudability:** Can be extruded into complex shapes with good surface finish * **Good Mechanical Strength:** Balanced strength properties for structural applications * **Corrosion Resistance:** Good resistance to atmospheric corrosion * **Weldability:** Can be readily welded using conventional methods * **Formability:** Good bending and forming characteristics * **Anodizing Response:** Responds well to anodizing for surface protection * **Machinability:** Good machining characteristics in appropriate tempers * **Fatigue Resistance:** Good performance under cyclic loading conditions * **Cost-Effectiveness:** Good balance of performance and cost for structural applications **Important Note on Stress Corrosion Cracking:** While Aluminum 6351A offers good general performance, it's important to note that earlier versions of 6351 alloy have been associated with stress corrosion cracking concerns in certain applications. The "A" variant includes improved composition controls to address these issues, but proper heat treatment and design considerations remain essential for critical applications. **Conclusion:** Aluminum 6351A is a versatile structural alloy that provides an excellent balance of extrudability, mechanical properties, and corrosion resistance. Its compliance with European standards and suitability for various structural applications make it a valuable material for transportation, architectural, and industrial sectors. However, proper engineering evaluation is recommended for applications where stress corrosion resistance is critical.

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 2073 gallon liquid totes Special package is available on request.