5251-O Aluminum alloy,Aluminum 5251-O alloy,E FORU

### **5251-O Aluminum Alloy Technical Datasheet** **Material Overview** 5251-O is the annealed temper of the 5251 aluminum-magnesium alloy, offering maximum ductility and formability for severe forming operations. In the "O" (annealed) condition, this non-heat-treatable alloy achieves its softest state with excellent workability, while maintaining good corrosion resistance and mechanical properties typical of the 5xxx series alloys. --- ### **1. Chemical Composition (Weight %)** | Element | Composition Range | |---------|-------------------| | Aluminum (Al) | Balance | | Magnesium (Mg) | 1.7 - 2.4 | | Manganese (Mn) | 0.10 - 0.40 | | Silicon (Si) | ≤ 0.30 | | Iron (Fe) | ≤ 0.40 | | Chromium (Cr) | 0.10 - 0.30 | | Copper (Cu) | ≤ 0.10 | | Zinc (Zn) | ≤ 0.20 | | Titanium (Ti) | ≤ 0.10 | | Other Elements (Each) | ≤ 0.05 | | Other Elements (Total) | ≤ 0.15 | --- ### **2. Physical Properties** | Property | Value | |----------|-------| | Density | 2.69 g/cm³ | | Melting Range | 610 - 650 °C | | Electrical Conductivity | 35-39% IACS | | Thermal Conductivity | 138 - 148 W/m·K | | Coefficient of Thermal Expansion (20-100°C) | 23.7 × 10⁻⁶/°C | | Modulus of Elasticity | 70 GPa | | Specific Heat Capacity | 900 J/kg·K | --- ### **3. Mechanical Properties** | Property | Typical Value | |----------|---------------| | Tensile Strength | 170 - 210 MPa | | Yield Strength (0.2% Offset) | 65 - 105 MPa | | Elongation (50mm) | 22 - 27% | | Hardness (Brinell) | 50 - 60 HB | | Shear Strength | 115 - 140 MPa | | Fatigue Strength | 95 - 115 MPa | --- ### **4. Technical Applications** **Primary Application Sectors:** - **Deep Drawing & Forming** - Complex deep-drawn components - Severe forming applications - Intricate stamped parts - Multi-stage formed components - **Automotive Components** - Complex body panels - Interior trim components - Fuel tank components - Structural reinforcements - **Marine Applications** - Boat hull components - Marine fittings - Deck equipment - Superstructure components - **General Manufacturing** - Complex fabricated parts - Prototype development - Custom components - Architectural elements --- ### **5. International Standards Compliance** | Standard Organization | Designation | |----------------------|-------------| | Aluminum Association | AA 5251-O | | ASTM International | ASTM B209-5251 O | | European Standards | EN AW-5251A O | | Japanese Standards | JIS A5251 O | | International Standards | ISO 6361-2 AlMg2Mn0.3 O | --- ### **6. Material Characteristics** **Key Advantages:** - Maximum ductility and formability - Excellent deep drawing capability - Good corrosion resistance - Superior weldability - Consistent mechanical properties - Ideal for complex forming operations **Processing Characteristics:** - **Forming Operations** - Exceptional deep drawing performance - Minimal springback - Suitable for severe bending - Excellent stretch forming capability - **Joining Technology** - Excellent weldability (all standard methods) - Recommended filler: 5356, 5183 - Good adhesive bonding characteristics - Suitable for mechanical fastening - **Heat Treatment** - Supplied in fully annealed condition - Can be strain-hardened after forming - Suitable for all cold working operations - Stable properties at room temperature --- ### **7. Quality Assurance** **Testing & Certification:** - Mechanical property verification - Chemical composition analysis - Formability testing - Surface quality inspection - Corrosion resistance evaluation - Mill test certificates per EN 10204 3.1 --- ### **8. Special Considerations** **Manufacturing Advantages:** - Ideal for prototyping and complex designs - Suitable for most severe forming operations - Excellent for parts requiring multiple forming stages - Consistent performance in high-volume production **Application Guidelines:** - Perfect for components requiring maximum formability - Suitable for subsequent strain hardening - Excellent base material for further processing - Recommended for welding complex assemblies --- **Technical Note:** 5251-O Aluminum Alloy provides the ultimate in formability and workability within the 5251 alloy system. The fully annealed condition makes it the preferred choice for applications requiring severe forming operations, complex geometries, and maximum ductility. The material can be subsequently strain-hardened to achieve higher strength levels if required by the final application, offering manufacturers exceptional flexibility in production processes. Its balanced chemical composition ensures good corrosion resistance while maintaining excellent manufacturing characteristics for a wide range of industrial applications.

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 1867 gallon liquid totes Special package is available on request.