A-2S Alnico Magnetic Material,E FORU

### **Product Introduction: A-2S Alnico Magnetic Material** **A-2S Alnico** is an enhanced isotropic permanent magnet material that builds upon the foundation of standard A-2 Alnico, offering improved mechanical properties and more consistent magnetic performance. The "S" designation typically indicates a specialized version with optimized processing for better structural integrity and magnetic consistency, making it particularly suitable for applications requiring reliable performance in demanding environments. This material maintains all the fundamental advantages of traditional Alnico magnets - exceptional temperature stability, excellent corrosion resistance, and long-term magnetic stability - while providing enhanced mechanical strength and more predictable magnetic characteristics across production batches. --- #### **1. Chemical Composition (Weight %)** The typical chemical composition of A-2S Alnico is as follows: | Element | Content (%) | |---------|-------------| | **Iron (Fe)** | Balance | | **Aluminum (Al)** | 8.5 - 9.5 | | **Nickel (Ni)** | 14.5 - 16.5 | | **Cobalt (Co)** | 11.0 - 13.0 | | **Copper (Cu)** | 2.8 - 3.8 | | **Titanium (Ti)** | 0.6 - 1.2 | | **Silicon (Si)** | 0.2 - 0.6 | | **Manganese (Mn)** | 0.1 - 0.4 | | **Other Elements** | ≤ 0.3 | --- #### **2. Physical & Magnetic Properties** **Magnetic Properties (Typical at 20°C):** | Property | Value (Typical) | Unit | |----------|-----------------|------| | **Residual Induction (Bᵣ)** | 7.2 - 7.8 | kG | | **Coercivity (Hᶜ)** | 1.5 - 1.7 | kOe | | **Intrinsic Coercivity (Hᶜⱼ)** | 1.6 - 1.8 | kOe | | **Maximum Energy Product ((BH)ₘₐₓ)** | 1.6 - 2.0 | MGOe | **Physical & Mechanical Properties:** | Property | Value | Unit | |----------|-------|------| | **Density** | 7.05 - 7.15 | g/cm³ | | **Coefficient of Thermal Expansion** | 11.3 - 12.0 | μm/m·°C | | **Curie Temperature** | 820 - 840 | °C | | **Maximum Operating Temperature** | 450 - 480 | °C | | **Vickers Hardness** | 520 - 580 | HV | | **Electrical Resistivity** | 72 - 88 | μΩ·cm | | **Compressive Strength** | 920 - 1080 | MPa | | **Flexural Strength** | 175 - 225 | MPa | | **Temperature Coefficient of Bᵣ** | -0.020 to -0.025 | %/°C | --- #### **3. Key Characteristics & Product Applications** **Key Characteristics:** - **Isotropic Flexibility**: Can be magnetized in any direction, enabling complex multi-pole magnetization patterns - **Enhanced Mechanical Strength**: Improved structural integrity compared to standard A-2 grade - **Excellent Thermal Stability**: Maintains magnetic performance at elevated temperatures up to 480°C - **Superior Consistency**: More uniform magnetic properties across production batches - **Good Corrosion Resistance**: Naturally stable in most environments without protective coatings - **Reliable Long-Term Performance**: Minimal aging effects over extended service periods **Product Applications:** A-2S Alnico is widely used in applications requiring isotropic characteristics with enhanced reliability: - **Automotive Systems**: - Sensor rings for position sensing - Speed detection sensors - Small motor components - Ignition system parts - **Industrial Equipment**: - Magnetic separators and concentrators - Workholding devices and magnetic chucks - Process control instruments - Flow meters and measuring devices - **Consumer Products**: - Decorative magnets - Magnetic latches and closures - Audio speaker systems - Hobby and craft applications - **Electromechanical Devices**: - Reed switches and relays - Instrument motors - Magnetic coupling systems - Sensing and detection devices --- #### **4. International Standards & Specifications** A-2S Alnico conforms to the following 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 - **Regional Standards**: - **Europe**: EN 10303 equivalent specifications - **Japan**: JIS C 2502 compliant - **China**: GB/T 17951.4 similar classification - **Industry Certifications**: - Meets general industrial quality standards - Compliant with RoHS and REACH requirements - Suitable for automotive and consumer applications --- #### **Summary of Key Advantages** - **Enhanced Mechanical Properties**: Superior strength and hardness compared to standard isotropic grades - **Excellent Isotropic Characteristics**: Flexible magnetization in any direction - **Good Thermal Stability**: Reliable performance up to 480°C continuous service - **Improved Consistency**: More predictable magnetic properties across production batches - **Cost-Effective Performance**: Optimal balance of performance and cost for isotropic applications - **Proven Reliability**: Long-term stability with minimal performance degradation **Technical Note**: The A-2S grade maintains the isotropic nature of standard A-2 Alnico while offering improved mechanical properties and more consistent magnetic characteristics. This makes it particularly suitable for applications where both magnetic performance and structural reliability are important. Like all Alnico materials, it requires diamond tools for machining and proper handling to prevent fracture due to its brittle nature. The material's isotropic characteristics make it ideal for applications requiring complex magnetic field patterns and multi-pole magnetization.

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 3146 gallon liquid totes Special package is available on request.