A-6 Alnico Magnetic Material,E FORU

### **Product Introduction: A-6 Alnico Magnetic Material** **A-6 Alnico** is a high-performance anisotropic permanent magnet material from the Alnico family, specifically engineered to deliver superior magnetic properties with excellent thermal stability. As an anisotropic grade, it exhibits optimal magnetic characteristics when magnetized along its preferred crystallographic orientation, making it ideal for applications requiring precise magnetic field direction and consistent performance under demanding conditions. This material represents an advanced formulation within the Alnico family, offering an exceptional balance of high residual induction and enhanced coercivity, combined with the characteristic Alnico advantages of outstanding temperature resistance and long-term reliability. --- #### **1. Chemical Composition (Weight %)** The typical chemical composition of A-6 Alnico is as follows: | Element | Content (%) | |---------|-------------| | **Iron (Fe)** | Balance | | **Aluminum (Al)** | 7.5 - 8.5 | | **Nickel (Ni)** | 14.0 - 16.0 | | **Cobalt (Co)** | 23.5 - 25.5 | | **Copper (Cu)** | 2.8 - 3.8 | | **Titanium (Ti)** | 0.3 - 0.9 | | **Niobium (Nb)** | 0.8 - 1.5 | | **Silicon (Si)** | 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)** | 13.2 - 13.8 | kG | | **Coercivity (Hᶜ)** | 1.55 - 1.80 | kOe | | **Intrinsic Coercivity (Hᶜⱼ)** | 1.65 - 1.90 | kOe | | **Maximum Energy Product ((BH)ₘₐₓ)** | 7.5 - 8.2 | MGOe | **Physical & Mechanical Properties:** | Property | Value | Unit | |----------|-------|------| | **Density** | 7.32 - 7.42 | g/cm³ | | **Coefficient of Thermal Expansion** | 11.6 - 12.3 | μm/m·°C | | **Curie Temperature** | 850 - 870 | °C | | **Maximum Operating Temperature** | 520 - 540 | °C | | **Vickers Hardness** | 520 - 600 | HV | | **Electrical Resistivity** | 78 - 95 | μΩ·cm | | **Compressive Strength** | 980 - 1200 | MPa | | **Flexural Strength** | 190 - 250 | MPa | | **Temperature Coefficient of Bᵣ** | -0.019 to -0.023 | %/°C | --- #### **3. Key Characteristics & Product Applications** **Key Characteristics:** - **Anisotropic Excellence**: Delivers maximum magnetic performance when magnetized along preferred orientation - **Enhanced Thermal Stability**: Maintains magnetic properties at extreme temperatures up to 540°C - **Superior Coercivity**: Excellent resistance to demagnetization under adverse conditions - **Outstanding Corrosion Resistance**: Naturally stable in harsh environments without protective coatings - **Premium Mechanical Properties**: High hardness and strength for demanding applications - **Exceptional Longevity**: Minimal performance degradation over decades of service **Product Applications:** A-6 Alnico is particularly suitable for high-reliability applications in challenging environments: - **Precision Measurement Instruments**: - Mass spectrometry systems - Electron beam focusing devices - Laboratory analytical equipment - High-accuracy sensors and transducers - **Aerospace and Defense Systems**: - Aircraft engine monitoring sensors - Satellite positioning and control systems - Military-grade navigation instruments - Aerospace motor and generator components - **Industrial Power Systems**: - High-temperature electric motors - Magnetic bearing systems - Power generation equipment - Industrial process control instruments - **Medical and Scientific Equipment**: - MRI system components - Scientific research apparatus - Medical diagnostic equipment - Laboratory instrumentation - **Automotive High-Performance Applications**: - Racing ignition systems - High-temperature sensors - Specialty electric vehicle components - Performance measurement systems --- #### **4. International Standards & Specifications** A-6 Alnico complies with major 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 17951.8 similar classification - **Industry Certifications**: - Meets aerospace and military quality standards - Compliant with RoHS and REACH requirements - Qualified for automotive and industrial applications --- #### **Summary of Key Advantages** - **Premium Magnetic Performance**: Superior energy product with excellent coercivity balance - **Exceptional Temperature Resistance**: Reliable operation up to 540°C continuous service - **Enhanced Mechanical Properties**: Optimal hardness and strength for demanding applications - **Long-Term Reliability**: Proven stability with minimal aging effects over decades - **Environmental Durability**: Natural corrosion resistance in challenging environments - **Consistent Quality**: Tight control of magnetic and physical properties **Technical Note**: The anisotropic nature of A-6 Alnico requires precise orientation control during manufacturing and magnetization processes. Optimal magnetic performance is achieved when magnetized along the preferred crystallographic direction established during thermal magnetic treatment. Machining operations require diamond tools and proper cooling techniques to maintain material integrity and prevent micro-fractures.

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 3144 gallon liquid totes Special package is available on request.