5251A Aluminum alloy,Aluminum 5251A alloy,E FORU

### **5251A Aluminum Alloy Technical Datasheet** **Material Overview** 5251A Aluminum Alloy is a refined non-heat-treatable aluminum-magnesium alloy from the 5xxx series, representing an enhanced version of the standard 5251 alloy. This alloy variant features optimized chemical composition controls to achieve improved consistency, better surface quality, and enhanced corrosion resistance. The "A" designation indicates tighter manufacturing tolerances and superior quality assurance standards, making it suitable for demanding applications in automotive, marine, and general engineering sectors. --- ### **1. Chemical Composition (Weight %)** | Element | Composition Range | Notes | |---------|-------------------|-------| | Aluminum (Al) | Balance | High purity base | | Magnesium (Mg) | 1.8 - 2.3 | Tighter control | | Manganese (Mn) | 0.15 - 0.35 | Optimized range | | Silicon (Si) | ≤ 0.20 | Reduced limit | | Iron (Fe) | ≤ 0.30 | Enhanced purity | | Chromium (Cr) | 0.15 - 0.25 | Controlled addition | | Copper (Cu) | ≤ 0.05 | Ultra-low | | Zinc (Zn) | ≤ 0.15 | Reduced | | Titanium (Ti) | 0.05 - 0.10 | Grain refinement | | Other Elements (Each) | ≤ 0.03 | Tighter control | | Other Elements (Total) | ≤ 0.10 | Enhanced purity | --- ### **2. Physical Properties** | Property | Value | Standard | |----------|-------|----------| | Density | 2.69 g/cm³ | ASTM B193 | | Melting Range | 615 - 645 °C | - | | Electrical Conductivity | 36-40% IACS | ASTM E1004 | | Thermal Conductivity | 140 - 150 W/m·K | ASTM E1461 | | Coefficient of Thermal Expansion | 23.6 × 10⁻⁶/°C | ASTM E228 | | Modulus of Elasticity | 70 GPa | ASTM E111 | | Specific Heat Capacity | 900 J/kg·K | - | --- ### **3. Mechanical Properties (by Temper)** | Temper | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | |--------|------------------------|----------------------|----------------| | O | 175 - 215 | 70 - 110 | 24 - 28 | | H32 | 225 - 265 | 180 - 220 | 14 - 18 | | H34 | 245 - 285 | 200 - 240 | 12 - 16 | | H36 | 265 - 305 | 220 - 260 | 10 - 14 | --- ### **4. Technical Applications** **Premium Application Sectors:** - **Automotive Excellence** - Quality body panels - Structural reinforcements - Interior trim components - Chassis components - **Marine Engineering** - Boat hull components - Marine structural parts - Deck equipment - Offshore components - **Architectural Applications** - High-quality architectural panels - Curtain wall systems - Interior design elements - Structural frameworks - **General Engineering** - Pressure vessels - Storage tanks - Industrial equipment - Machinery components --- ### **5. International Standards Compliance** | Standard Organization | Designation | Specification | |----------------------|-------------|---------------| | European Standards | EN AW-5251A | EN 485-2 | | Aluminum Association | AA 5251 | Enhanced Grade | | ASTM International | ASTM B209 | Premium Quality | | ISO Standards | ISO 6361-2 | AlMg2Mn0.3 | | German Standards | DIN 3.3525 | Special Grade | --- ### **6. Material Characteristics** **Enhanced Advantages:** - Improved corrosion resistance - Superior surface quality - Consistent mechanical properties - Enhanced formability - Excellent weldability - Better batch-to-batch consistency **Special Features:** - **Corrosion Performance** - Enhanced atmospheric corrosion resistance - Better stress corrosion cracking resistance - Improved performance in marine environments - Superior long-term durability - **Surface Quality** - Excellent anodizing characteristics - Superior painting adhesion - Consistent surface appearance - Good polishing response --- ### **7. Processing Characteristics** **Advanced Manufacturing:** - **Forming Operations** - Excellent deep drawing capability - Consistent forming characteristics - Predictable springback behavior - Superior stretch forming performance - **Welding Technology** - Enhanced weldability - Recommended filler: 5356, 5183 - Minimal property degradation in HAZ - Excellent weld appearance - **Quality Control** - Better ultrasonic inspectability - Consistent mechanical properties - Superior surface quality - Enhanced dimensional stability --- ### **8. Quality Assurance** **Premium Testing Protocol:** - Enhanced chemical analysis - Advanced mechanical testing - Comprehensive corrosion testing - Surface quality certification - Formability evaluation - Third-party certification available **Certification Standards:** - EN 10204 3.2 Certification - Enhanced traceability requirements - Special process controls - Premium quality documentation --- ### **9. Special Considerations** **Design Applications:** - Quality structural components - Automotive safety parts - Marine structural applications - Architectural excellence projects **Performance Features:** - Consistent mechanical properties - Superior surface quality - Enhanced corrosion performance - Reliable manufacturing characteristics --- **Technical Note:** 5251A Aluminum Alloy represents the premium grade in its category, specifically designed for applications where superior consistency and enhanced performance are required. The improved chemical controls and manufacturing processes ensure exceptional performance in demanding applications including automotive, marine, and architectural industries. Its enhanced consistency and reliability make it the preferred choice for quality-conscious applications requiring dependable material performance.

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 1868 gallon liquid totes Special package is available on request.