A-5 Alnico Magnetic Material,E FORU

### **Product Introduction: A-5 Alnico Magnetic Material** **A-5 Alnico** is a high-performance isotropic permanent magnet material from the Alnico family, offering enhanced magnetic properties while maintaining the characteristic advantages of Alnico materials. As an isotropic grade, it provides design flexibility by allowing magnetization in any direction without orientation constraints during manufacturing. This material represents an optimal balance between magnetic performance and manufacturing versatility, making it suitable for applications requiring higher energy product than standard isotropic grades while maintaining the excellent thermal stability and corrosion resistance inherent to Alnico materials. --- #### **1. Chemical Composition (Weight %)** The typical chemical composition of A-5 Alnico is as follows: | Element | Content (%) | | :--- | :--- | | **Iron (Fe)** | Balance | | **Aluminum (Al)** | 8.0 - 9.0 | | **Nickel (Ni)** | 14.0 - 15.0 | | **Cobalt (Co)** | 24.0 - 25.0 | | **Copper (Cu)** | 3.0 - 3.5 | | **Titanium (Ti)** | 0.5 - 1.0 | | **Niobium (Nb)** | 0.5 - 1.0 | | **Other Elements** | ≤ 0.5 | The optimized composition, particularly the higher cobalt content compared to lower-grade isotropic Alnicos, contributes to improved magnetic performance while maintaining isotropic characteristics. --- #### **2. Physical & Magnetic Properties** **Magnetic Properties (Typical at 20°C):** | Property | Value (Typical) | Unit | | :--- | :--- | :--- | | **Residual Induction (Bᵣ)** | 10.5 - 11.5 | kG (kiloGauss) | | **Coercivity (Hᶜ)** | 1.4 - 1.6 | kOe (kiloOersteds) | | **Intrinsic Coercivity (Hᶜⱼ)** | 1.5 - 1.7 | kOe (kiloOersteds) | | **Maximum Energy Product ((BH)ₘₐₓ)** | 5.0 - 5.5 | MGOe (Mega-Gauss Oersteds) | **Physical & Mechanical Properties:** | Property | Value | Unit | | :--- | :--- | :--- | | **Density** | 7.2 - 7.3 | g/cm³ | | **Coefficient of Thermal Expansion (20-500°C)** | ~11.5 | μm/m·°C | | **Curie Temperature (T𝒸)** | ~890 | °C | | **Maximum Operating Temperature** | ~550 | °C | | **Vickers Hardness** | ~520 | HV | | **Electrical Resistivity** | ~75 | μΩ·cm | | **Compressive Strength** | 800 - 1000 | MPa | | **Flexural Strength** | 150 - 200 | MPa | --- #### **3. Key Characteristics & Product Applications** **Key Characteristics:** * **Isotropic Properties:** Enables multi-pole magnetization and complex magnetic circuit designs without orientation constraints * **Enhanced Magnetic Performance:** Higher energy product compared to standard isotropic Alnico grades (A-2, A-3) * **Superior Thermal Stability:** Temperature coefficient of -0.02%/°C, suitable for high-temperature applications * **Excellent Corrosion Resistance:** Inherent stability in most environments without protective coatings * **High Mechanical Strength:** Good compressive strength and wear resistance * **Long-Term Stability:** Minimal aging effects and excellent resistance to demagnetization **Product Applications:** A-5 Alnico is widely used in applications requiring higher magnetic strength with isotropic characteristics: * **Automotive Applications:** - High-temperature sensors and actuators - Ignition systems - Speed measurement sensors - Small motor components * **Industrial Equipment:** - Magnetic separators and concentrators - Holding magnets for heavy-duty applications - Chuck systems for machining - Flow meters and measuring instruments * **Consumer Products:** - High-performance decorative magnets - Magnetic coupling devices - Security systems - Audio equipment components * **Aerospace and Defense:** - Navigation instruments - Sensor systems for high-temperature environments - Control system components * **Specialized Applications:** - Electron tube focusing systems - Traveling wave tube magnets - Medical equipment sensors --- #### **4. International Standards & Specifications** A-5 Alnico is recognized in major international standards: * **IEC 60404-8-1:** International standard for permanent magnet materials * **ASTM A894/A894M:** Standard specification for aged permanent magnet alloys * **National Standards:** - **China:** GB/T 17951.5 (similar to LN-12 series) - **Japan:** JIS C 2502-5-XXX - **Germany:** DIN 17410 * **Industry Specifications:** - Commonly specified as **Alnico 5 Isotopic** or **A-5 ISO** - Recognized in various automotive (SAE) and aerospace specifications --- #### **Summary of Key Advantages** * **Design Versatility:** Isotropic nature allows for flexible magnetization patterns and complex geometries * **Enhanced Performance:** Higher magnetic energy compared to standard isotropic Alnico grades * **Exceptional Thermal Capability:** Stable performance up to 550°C continuous operation * **Robust Mechanical Properties:** Good strength and hardness for demanding applications * **Maintenance-Free Operation:** No protective coatings required in most environments * **Proven Reliability:** Excellent long-term stability with minimal aging effects **Note:** Like all Alnico materials, A-5 is brittle and requires diamond tooling for machining. Proper handling procedures should be followed to prevent chipping or fracture. The material's isotropic nature makes it particularly suitable for applications requiring complex magnetic field patterns.

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 3140 gallon liquid totes Special package is available on request.