A-5DG Alnico Magnetic Material,E FORU

### **Product Introduction: A-5DG Alnico Magnetic Material** **A-5DG Alnico** is a specialized isotropic permanent magnet material from the Alnico family, designed to provide excellent magnetic performance with enhanced mechanical properties. The "DG" designation typically indicates a specific grain-oriented or directionally controlled version that offers improved consistency and reliability in magnetic characteristics. This material combines the traditional advantages of Alnico magnets - exceptional thermal stability, high Curie temperature, and good corrosion resistance - with optimized processing to deliver more predictable and uniform magnetic performance across production batches. --- #### **1. Chemical Composition (Weight %)** The typical chemical composition of A-5DG Alnico is as follows: | Element | Content (%) | | | | | **Iron (Fe)** | Balance | | **Aluminum (Al)** | 7.8 - 8.5 | | **Nickel (Ni)** | 13.5 - 15.5 | | **Cobalt (Co)** | 23.5 - 25.0 | | **Copper (Cu)** | 3.0 - 3.8 | | **Titanium (Ti)** | 0.3 - 0.7 | | **Niobium (Nb)** | 0.8 - 1.3 | | **Silicon (Si)** | 0.1 - 0.3 | | **Other Elements** | ≤ 0.2 | The composition is carefully balanced to promote the formation of the characteristic two-phase microstructure that gives Alnico its unique magnetic properties, with particular attention to consistency in grain structure. --- #### **2. Physical & Magnetic Properties** **Magnetic Properties (Typical at 20°C):** | Property | Value (Typical) | Unit | | | | | | **Residual Induction (Bᵣ)** | 12.5 - 13.0 | kG (kiloGauss) | | **Coercivity (Hᶜ)** | 1.45 - 1.65 | kOe (kiloOersteds) | | **Intrinsic Coercivity (Hᶜⱼ)** | 1.55 - 1.75 | kOe (kiloOersteds) | | **Maximum Energy Product ((BH)ₘₐₓ)** | 6.5 - 7.2 | MGOe (Mega-Gauss Oersteds) | **Physical & Mechanical Properties:** | Property | Value | Unit | | | | | | **Density** | 7.25 - 7.35 | g/cm³ | | **Coefficient of Thermal Expansion (20-500°C)** | 11.2 - 12.0 | μm/m·°C | | **Curie Temperature (T𝒸)** | 840 - 860 | °C | | **Maximum Operating Temperature** | 500 - 520 | °C | | **Vickers Hardness** | 480 - 550 | HV | | **Electrical Resistivity** | 70 - 85 | μΩ·cm | | **Compressive Strength** | 900 - 1100 | MPa | | **Flexural Strength** | 170 - 220 | MPa | | **Temperature Coefficient of Bᵣ** | -0.018 to -0.022 | %/°C | --- #### **3. Key Characteristics & Product Applications** **Key Characteristics:** * **Isotropic Nature**: Can be magnetized in any direction, providing design flexibility for complex magnetic circuits * **Enhanced Consistency**: Improved batch-to-batch uniformity in magnetic properties * **Excellent Thermal Stability**: Maintains magnetic performance at elevated temperatures * **Good Mechanical Integrity**: Balanced hardness and strength for reliable performance * **Superior Corrosion Resistance**: Does not require protective coatings in most environments * **Low Temperature Coefficient**: Minimal change in magnetic properties with temperature variations **Product Applications:** A-5DG Alnico is suitable for various demanding applications where consistent performance and thermal stability are critical: * **Automotive Systems**: - High-temperature sensors and actuators - Ignition system components - Position and speed sensors - Electric vehicle motor components * **Industrial Equipment**: - Magnetic separators and concentrators - Holding and lifting magnets - Process control instruments - Flow meters and measuring devices * **Aerospace and Defense**: - Navigation and guidance systems - Sensor systems for extreme environments - Aircraft control systems - Satellite components * **Consumer and Commercial Products**: - High-performance audio speakers - Microwave oven magnetrons - Security system components - Medical device sensors * **Energy Sector**: - Wind turbine generator systems - Power generation equipment - Energy metering devices --- #### **4. International Standards & Specifications** A-5DG Alnico complies with several international standards: * **IEC 60404-8-1**: International standard for permanent magnet materials * **ASTM A894/A894M**: Standard specification for aged permanent magnet alloys * **ISO 17556**: International standard for permanent magnet materials * **National Standards**: - **China**: GB/T 17951.6 (similar classification) - **Japan**: JIS C 2502-6-XXX - **Germany**: DIN 17410 equivalent * **Industry Specifications**: - Typically classified as **Alnico 5 Isotropic - Directionally Controlled** - Recognized in automotive (SAE) and aerospace quality standards - Meets RoHS and REACH environmental requirements --- #### **Summary of Key Advantages** * **Consistent Performance**: Enhanced uniformity in magnetic properties across production batches * **Design Flexibility**: Isotropic characteristics allow for versatile magnetization patterns * **High Temperature Capability**: Reliable operation up to 520°C continuous service * **Excellent Stability**: Minimal aging effects and long-term reliability * **Robust Mechanical Properties**: Suitable for demanding industrial applications * **Environmental Resistance**: Naturally corrosion-resistant without additional coatings * **Proven Reliability**: Established track record in critical applications **Manufacturing Note**: The directional grain control in A-5DG provides more consistent magnetic performance while maintaining the isotropic nature that allows for flexible magnetization directions. Proper heat treatment cycles are essential for achieving optimal magnetic properties. Machining requires diamond tools due to the material's hardness and brittleness.

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 3142 gallon liquid totes Special package is available on request.