A-5-7 Alnico Magnetic Material,E FORU

### **Product Introduction: A-5-7 Alnico Magnetic Material** **A-5-7 Alnico** is a premium anisotropic permanent magnet material that represents an optimized version within the Alnico 5 family, offering enhanced magnetic performance through improved processing and composition control. This grade maintains the characteristic Alnico advantages of exceptional thermal stability and corrosion resistance while delivering superior magnetic properties in the preferred orientation direction. The "5-7" designation indicates a specific formulation that bridges the performance characteristics between standard Alnico 5 and higher-grade materials, providing an optimal balance of magnetic strength, coercivity, and manufacturing consistency for demanding applications. --- #### **1. Chemical Composition (Weight %)** The typical chemical composition of A-5-7 Alnico is as follows: | Element | Content (%) | |---------|-------------| | **Iron (Fe)** | Balance | | **Aluminum (Al)** | 7.8 - 8.3 | | **Nickel (Ni)** | 13.5 - 15.0 | | **Cobalt (Co)** | 23.8 - 25.2 | | **Copper (Cu)** | 3.1 - 3.6 | | **Titanium (Ti)** | 0.4 - 0.8 | | **Niobium (Nb)** | 0.9 - 1.4 | | **Silicon (Si)** | 0.15 - 0.35 | | **Other Elements** | ≤ 0.25 | --- #### **2. Physical & Magnetic Properties** **Magnetic Properties (Typical at 20°C):** | Property | Value (Typical) | Unit | |----------|-----------------|------| | **Residual Induction (Bᵣ)** | 13.0 - 13.5 | kG | | **Coercivity (Hᶜ)** | 1.50 - 1.75 | kOe | | **Intrinsic Coercivity (Hᶜⱼ)** | 1.60 - 1.85 | kOe | | **Maximum Energy Product ((BH)ₘₐₓ)** | 7.2 - 7.8 | MGOe | **Physical & Mechanical Properties:** | Property | Value | Unit | |----------|-------|------| | **Density** | 7.30 - 7.40 | g/cm³ | | **Coefficient of Thermal Expansion** | 11.5 - 12.2 | μm/m·°C | | **Curie Temperature** | 845 - 865 | °C | | **Maximum Operating Temperature** | 510 - 530 | °C | | **Vickers Hardness** | 500 - 580 | HV | | **Electrical Resistivity** | 75 - 90 | μΩ·cm | | **Compressive Strength** | 950 - 1150 | MPa | | **Flexural Strength** | 180 - 240 | MPa | --- #### **3. Key Characteristics & Product Applications** **Key Characteristics:** - **Anisotropic Performance**: Delivers optimal magnetic properties when magnetized along the preferred orientation - **Enhanced Temperature Stability**: Superior performance maintenance at elevated temperatures - **Optimized Coercivity**: Improved resistance to demagnetization compared to standard Alnico 5 - **Excellent Corrosion Resistance**: Inherent stability without requiring protective coatings - **Consistent Batch Quality**: Tight control of magnetic and physical properties - **Long-Term Reliability**: Minimal aging effects over extended service periods **Product Applications:** A-5-7 Alnico is particularly suitable for applications requiring robust performance in challenging environments: - **Precision Instrumentation**: - Mass spectrometers and analytical equipment - Electron microscope components - Laboratory measuring devices - Precision sensors and transducers - **Aerospace Systems**: - Aircraft engine sensors - Navigation system components - Satellite attitude control systems - Aerospace-grade motors and generators - **Industrial Automation**: - High-temperature motor applications - Magnetic coupling systems - Process control instrumentation - Quality inspection equipment - **Medical Technology**: - Diagnostic equipment magnets - Therapeutic device components - Medical imaging system parts - Surgical instrument positioning systems --- #### **4. International Standards & Specifications** A-5-7 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 17951.7 similar classification - **Industry Qualifications**: - Meets aerospace and defense quality requirements - Compliant with RoHS and REACH environmental directives - Suitable for automotive-grade applications --- #### **Summary of Key Advantages** - **Superior Magnetic Performance**: Enhanced energy product and coercivity balance - **Exceptional Thermal Capability**: Stable operation up to 530°C continuous service - **Premium Quality Consistency**: Tight tolerances on magnetic and physical properties - **Robust Mechanical Properties**: Excellent hardness and strength characteristics - **Proven Long-Term Reliability**: Minimal performance degradation over time - **Environmental Durability**: Natural corrosion resistance in most operating environments **Technical Note**: The anisotropic nature of A-5-7 Alnico requires careful attention to orientation during both manufacturing and magnetization processes. Optimal magnetic performance is achieved when the material is magnetized along the preferred crystallographic direction established during the heat treatment process. Machining operations require diamond tools and appropriate cooling to 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 3143 gallon liquid totes Special package is available on request.