6451 Aluminum alloy,Aluminum 6451 alloy，E FORU

### **Aluminum 6451 Alloy (EN AW-6451) - Product Introduction** **Aluminum 6451** is a heat-treatable aluminum-magnesium-silicon alloy specifically designed for excellent extrudability and good mechanical properties. This medium-strength alloy offers superior surface quality and is particularly suitable for architectural applications and structural components where good corrosion resistance and anodizing quality are required. --- #### **1. Chemical Composition** The chemical composition is balanced to optimize extrudability and mechanical properties: | Element | Content (%) (Typical) | Standard Range (EN 573-3) | |---|---|---| | **Aluminum (Al)** | Balance | Balance | | **Magnesium (Mg)** | 0.50 - 0.8 | 0.50 - 0.8 | | **Silicon (Si)** | 0.50 - 0.9 | 0.50 - 0.9 | | **Iron (Fe)** | ≤ 0.35 | ≤ 0.35 | | **Copper (Cu)** | ≤ 0.20 | ≤ 0.20 | | **Manganese (Mn)** | 0.10 - 0.40 | 0.10 - 0.40 | | **Chromium (Cr)** | 0.10 - 0.30 | 0.10 - 0.30 | | **Zinc (Zn)** | ≤ 0.10 | ≤ 0.10 | | **Titanium (Ti)** | ≤ 0.10 | ≤ 0.10 | | **Others (Each)** | ≤ 0.05 | ≤ 0.05 | | **Others (Total)** | ≤ 0.15 | ≤ 0.15 | *The balanced Mg/Si ratio ensures optimal formation of Mg₂Si precipitates during age hardening.* --- #### **2. Physical Properties** Aluminum 6451 exhibits well-balanced 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** | 45-50 % IACS (T5 Temper) | 45-50 % IACS | | **Thermal Conductivity** | 175-190 W/m·K | 1215-1320 BTU·in/(hr·ft²·°F) | | **Coefficient of Thermal Expansion** | 23.4 × 10⁻⁶/K | 13.0 × 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 (%) | |---|---|---|---| | **T4** | 180-220 | 90-130 | 16-20 | | **T5** | 220-260 | 180-220 | 12-16 | | **T6** | 250-290 | 220-260 | 10-14 | | **T651** | 260-300 | 230-270 | 9-13 | --- #### **4. International Standards** Aluminum 6451 complies with the following international standards: * **European Standard (EN):** **EN AW-6451** (Material Number 3.1145) * **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 3.1145 (Germany), BS (UK) --- #### **5. Product Applications** Aluminum 6451 is widely used in various structural and architectural applications: * **Architectural Systems:** Window frames, door frames, curtain walls * **Structural Components:** Building frameworks, support structures * **Transportation:** Railway car components, truck trailer sections * **Marine Applications:** Boat rails, marine structures * **Bridge Components:** Pedestrian bridge railings, walkways * **Industrial Equipment:** Machinery guards, framework, conveyor components * **Consumer Durables:** Furniture frames, sporting goods * **Electrical Applications:** Heat sinks, bus bar supports --- #### **6. Key Advantages & Characteristics** * **Excellent Extrudability:** Can be extruded into complex profiles with good surface finish * **Superior Surface Quality:** Excellent for anodizing and other surface treatments * **Good Corrosion Resistance:** Excellent performance in various environmental conditions * **Weldability:** Can be readily welded using conventional methods (MIG, TIG) * **Formability:** Good bending and forming characteristics in appropriate tempers * **Anodizing Response:** Produces high-quality, uniform anodized surfaces * **Machinability:** Good machining characteristics with proper tooling * **Recyclability:** Fully recyclable without degradation of properties * **Cost-Effectiveness:** Good balance of performance and cost for structural applications **Heat Treatment Characteristics:** - Solution heat treatment temperature: 520-540°C (968-1004°F) - Artificial aging temperature: 160-180°C (320-356°F) - Good response to both natural and artificial aging - Can achieve various strength levels through different aging treatments **Surface Treatment Compatibility:** - Excellent for clear and color anodizing - Suitable for powder coating, painting, and other finishes - Good for electroplating preparation - Maintains surface quality through various finishing processes **Fabrication Properties:** - Good bendability in T4 and T5 tempers - Can be machined using conventional methods - Suitable for welding with 4043 or 5356 filler wires - Responds well to cutting, drilling, and forming operations --- **Conclusion:** Aluminum 6451 is a versatile structural alloy that offers an excellent balance of extrudability, mechanical properties, and corrosion resistance. Its compliance with European standards and suitability for architectural and structural applications make it a preferred choice for quality-conscious manufacturers. The alloy's combination of good strength, excellent surface quality, and manufacturing flexibility ensures its continued use in applications where both aesthetic appeal and structural performance are important.

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 2079 gallon liquid totes Special package is available on request.