5251-H24 Aluminum alloy,Aluminum 5251-H24 alloy,E FORU

### **5251-H24 Aluminum Alloy Technical Datasheet** **Material Overview** 5251-H24 is a strain-hardened temper variant of the 5251 aluminum-magnesium alloy, offering an optimal balance of strength and formability for general engineering applications. The H24 temper indicates that the material has been strain-hardened and then partially annealed to achieve a half-hard strength level while maintaining adequate ductility. This temper provides enhanced mechanical properties compared to H22, making it suitable for applications requiring higher strength without compromising manufacturing versatility. --- ### **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 | 33-37% IACS | | Thermal Conductivity | 132 - 142 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 | Standard Minimum | |----------|---------------|------------------| | Tensile Strength | 230 - 270 MPa | 215 MPa | | Yield Strength (0.2% Offset) | 180 - 220 MPa | 170 MPa | | Elongation (50mm) | 12 - 16% | 10% | | Hardness (Brinell) | 65 - 75 HB | - | | Shear Strength | 140 - 170 MPa | - | | Fatigue Strength | 105 - 125 MPa | - | --- ### **4. Technical Applications** **Primary Application Sectors:** - **Automotive Industry** - Body structural components - Chassis reinforcements - Seat frames and brackets - Door impact beams - **Marine & Offshore** - Hull reinforcements - Deck structural members - Marine equipment components - Offshore platform fittings - **Transportation Equipment** - Truck body panels - Trailer structural parts - Railway carriage components - Container fittings - **Industrial Applications** - Pressure vessel components - Storage tank reinforcements - Machinery structural parts - Material handling equipment --- ### **5. International Standards Compliance** | Standard Organization | Designation | |----------------------|-------------| | Aluminum Association | AA 5251-H24 | | ASTM International | ASTM B209-5251 H24 | | European Standards | EN AW-5251A H24 | | Japanese Standards | JIS A5251 H24 | | International Standards | ISO 6361-2 AlMg2Mn0.3 H24 | --- ### **6. Material Characteristics** **Key Advantages:** - Enhanced strength compared to H22 temper - Maintains good formability for manufacturing - Excellent corrosion resistance - Good weldability characteristics - Reliable structural stability - Consistent mechanical properties **Processing Characteristics:** - **Forming Operations** - Suitable for moderate bending and forming - Predictable springback behavior - Good stamping performance - Requires controlled forming parameters - **Joining Technology** - Good weldability using standard methods - Recommended filler alloys: 5356, 5183 - Suitable for resistance spot welding - Good performance in adhesive bonding - **Surface Treatment** - Consistent coating adhesion - Good painting characteristics - Suitable for chemical treatments - Uniform surface appearance --- ### **7. Quality Assurance** **Testing & Certification:** - Comprehensive mechanical testing - Chemical composition verification - Surface quality assessment - Formability evaluation - Corrosion performance testing - Mill certification per international standards --- ### **8. Special Considerations** **Manufacturing Guidelines:** - Suitable for automated production processes - Requires proper tool design and maintenance - Consistent performance in mass production - Compatible with modern manufacturing techniques **Design Recommendations:** - Ideal for structural applications requiring moderate strength - Suitable for components exposed to corrosive environments - Excellent choice for weight-critical designs - Recommended when balanced properties are essential --- **Technical Note:** 5251-H24 Aluminum Alloy offers an optimal combination of enhanced strength and maintained manufacturability, positioning it as an excellent choice for applications requiring improved mechanical performance over H22 temper while retaining sufficient formability for efficient production. The stabilized H24 condition ensures reliable performance in demanding applications across various industries, particularly in automotive, marine, and general engineering sectors where both strength and corrosion resistance are critical requirements.

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 1870 gallon liquid totes Special package is available on request.