5257 Aluminum alloy,Aluminum 5257 alloy,E FORU

### **5257 Aluminum Alloy Technical Datasheet** **Material Overview** 5257 Aluminum Alloy is a non-heat-treatable aluminum-magnesium alloy from the 5xxx series, specifically designed for applications requiring excellent surface quality, good formability, and superior anodizing characteristics. With its moderate magnesium content and controlled impurity levels, this alloy offers an optimal balance between mechanical properties, corrosion resistance, and aesthetic appeal, making it particularly suitable for automotive trim, architectural components, and high-quality consumer products. --- ### **1. Chemical Composition (Weight %)** | Element | Composition Range | |---------|-------------------| | Aluminum (Al) | Balance | | Magnesium (Mg) | 1.2 - 2.0 | | Manganese (Mn) | 0.05 - 0.20 | | Silicon (Si) | ≤ 0.15 | | Iron (Fe) | ≤ 0.20 | | Chromium (Cr) | 0.10 - 0.25 | | Copper (Cu) | ≤ 0.05 | | Zinc (Zn) | ≤ 0.10 | | Titanium (Ti) | 0.03 - 0.10 | | Other Elements (Each) | ≤ 0.03 | | Other Elements (Total) | ≤ 0.10 | --- ### **2. Physical Properties** | Property | Value | |----------|-------| | Density | 2.70 g/cm³ | | Melting Range | 620 - 655 °C | | Electrical Conductivity | 38-42% IACS | | Thermal Conductivity | 142 - 152 W/m·K | | Coefficient of Thermal Expansion (20-100°C) | 23.6 × 10⁻⁶/°C | | Modulus of Elasticity | 70 GPa | | Specific Heat Capacity | 900 J/kg·K | --- ### **3. Mechanical Properties** | Temper | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | |--------|------------------------|----------------------|----------------| | O | 150 - 190 | 60 - 100 | 22 - 28 | | H12 | 170 - 210 | 130 - 170 | 14 - 18 | | H14 | 190 - 230 | 150 - 190 | 12 - 16 | | H16 | 210 - 250 | 170 - 210 | 10 - 14 | | H18 | 230 - 270 | 190 - 230 | 8 - 12 | --- ### **4. Technical Applications** **Primary Application Sectors:** - **Automotive Trim** - Exterior decorative moldings - Interior trim components - Wheel arch trim - Window trim and surrounds - **Architectural Applications** - Decorative architectural panels - Interior design elements - Window and door fittings - Decorative hardware - **Consumer Products** - Appliance trim and handles - Electronic enclosures and bezels - Quality kitchenware - Premium consumer goods - **Specialty Applications** - Nameplates and signage - Trophy and award components - Exhibition display systems - Decorative lighting fixtures --- ### **5. International Standards Compliance** | Standard Organization | Designation | |----------------------|-------------| | Aluminum Association | AA 5257 | | European Standards | EN AW-5257 | | Japanese Standards | JIS A5257 | | International Standards | ISO 6361-2 | --- ### **6. Material Characteristics** **Key Advantages:** - Excellent surface finish quality - Superior anodizing characteristics - Good corrosion resistance - Excellent formability and bendability - Good welding performance - Consistent color matching in anodized finishes **Special Features:** - **Surface Quality** - Excellent response to bright anodizing - Superior polishing characteristics - Good painting and coating adhesion - Consistent surface appearance - **Corrosion Performance** - Good atmospheric corrosion resistance - Suitable for indoor and outdoor applications - Resistant to industrial environments - Good weathering characteristics --- ### **7. Processing Characteristics** **Manufacturing Considerations:** - **Forming Operations** - Excellent deep drawing capability in O temper - Good bendability and formability - Minimal springback in soft tempers - Suitable for complex stamping operations - **Anodizing Performance** - Excellent for decorative anodizing - Uniform coating thickness - Good color consistency - Suitable for both clear and color anodizing - **Welding Technology** - Good weldability using standard methods - Recommended filler: 5356, 4043 - Good weld appearance - Minimal property degradation in HAZ - **Machining** - Good machinability in all tempers - Produces excellent surface finish - Suitable for high-speed machining - Good chip characteristics --- ### **8. Quality Assurance** **Testing & Certification:** - Mechanical property testing - Chemical composition analysis - Surface quality inspection - Anodizing quality tests - Corrosion resistance evaluation - Mill test certificates per EN 10204 3.1 --- ### **9. Special Considerations** **Design Applications:** - Automotive decorative components - Architectural trim elements - High-quality consumer products - Premium decorative applications **Processing Recommendations:** - Handle with care to prevent surface damage - Use proper tooling to maintain surface quality - Implement controlled forming processes - Ensure clean handling throughout production --- **Technical Note:** 5257 Aluminum Alloy is specifically optimized for applications requiring superior surface quality and excellent anodizing characteristics. Its balanced chemical composition ensures consistent performance in automotive trim, architectural components, and high-end consumer products where aesthetic appearance is paramount. The alloy maintains good mechanical properties and corrosion resistance while offering exceptional formability and manufacturing versatility, making it an ideal choice for visible components that require both functional performance and premium appearance.

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 1882 gallon liquid totes Special package is available on request.