A-8S Alnico Magnetic Material,E FORU

### **Product Introduction: A-8S Alnico Magnetic Material** **A-8S Alnico** represents an enhanced version of the premium Alnico 8 grade, offering superior magnetic consistency and improved mechanical properties while maintaining the highest coercivity characteristics in the Alnico family. This specialized anisotropic permanent magnet material is engineered for the most demanding applications where exceptional stability under extreme demagnetizing conditions, elevated temperatures, and rigorous operational environments is required. The "S" designation indicates optimized processing and enhanced quality control measures that deliver more reliable performance and improved structural integrity, making it particularly suitable for critical applications in aerospace, defense, and precision instrumentation where failure is not an option. --- #### **1. Chemical Composition (Weight %)** The typical chemical composition of A-8S Alnico is as follows: | Element | Content (%) | |---------|-------------| | **Iron (Fe)** | Balance | | **Aluminum (Al)** | 6.8 - 7.8 | | **Nickel (Ni)** | 14.0 - 16.0 | | **Cobalt (Co)** | 34.5 - 36.5 | | **Copper (Cu)** | 3.0 - 3.8 | | **Titanium (Ti)** | 4.8 - 5.8 | | **Niobium (Nb)** | 0.4 - 1.0 | | **Silicon (Si)** | 0.1 - 0.4 | | **Other Elements** | ≤ 0.2 | --- #### **2. Physical & Magnetic Properties** **Magnetic Properties (Typical at 20°C):** | Property | Value (Typical) | Unit | |----------|-----------------|------| | **Residual Induction (Bᵣ)** | 8.0 - 8.8 | kG | | **Coercivity (Hᶜ)** | 5.0 - 5.8 | kOe | | **Intrinsic Coercivity (Hᶜⱼ)** | 5.2 - 6.0 | kOe | | **Maximum Energy Product ((BH)ₘₐₓ)** | 5.2 - 6.0 | MGOe | **Physical & Mechanical Properties:** | Property | Value | Unit | |----------|-------|------| | **Density** | 7.32 - 7.42 | g/cm³ | | **Coefficient of Thermal Expansion** | 11.2 - 11.9 | μm/m·°C | | **Curie Temperature** | 865 - 885 | °C | | **Maximum Operating Temperature** | 580 - 620 | °C | | **Vickers Hardness** | 600 - 680 | HV | | **Electrical Resistivity** | 90 - 110 | μΩ·cm | | **Compressive Strength** | 1050 - 1300 | MPa | | **Flexural Strength** | 210 - 270 | MPa | | **Temperature Coefficient of Bᵣ** | -0.014 to -0.018 | %/°C | --- #### **3. Key Characteristics & Product Applications** **Key Characteristics:** - **Ultra-High Coercivity**: Exceptional resistance to demagnetization, the highest among commercial Alnico grades - **Enhanced Thermal Stability**: Maintains magnetic properties at extreme temperatures up to 620°C - **Superior Mechanical Integrity**: Improved structural strength and resistance to thermal shock - **Excellent Batch Consistency**: More uniform magnetic properties across production batches - **Outstanding Corrosion Resistance**: Inherent stability in harsh environments without coatings - **Optimized Anisotropic Performance**: Maximum magnetic properties when properly oriented and magnetized **Product Applications:** A-8S Alnico is essential for the most critical applications where magnetic stability and reliability are paramount: - **Aerospace and Defense Systems**: - Aircraft engine monitoring sensors - Satellite positioning and attitude control systems - Military radar and communication equipment - Guidance and navigation system components - **Scientific Research Instruments**: - Mass spectrometers and particle accelerators - Electron microscopy systems - Nuclear magnetic resonance equipment - High-energy physics research equipment - **Medical Technology**: - MRI system components - Radiation therapy devices - Surgical navigation systems - Advanced diagnostic equipment - **Industrial Measurement**: - High-temperature process control sensors - Precision measurement instruments - Quality assurance equipment - Industrial automation systems - **Energy and Power Systems**: - High-temperature motor applications - Power generation equipment - Energy conversion systems - Specialized generator components --- #### **4. International Standards & Specifications** A-8S Alnico meets 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 17951.9 similar classification - **Industry Certifications**: - Aerospace quality standards (AS/EN9100) - Military specifications compliance - Medical device regulations (where applicable) - RoHS and REACH environmental compliance --- #### **Summary of Key Advantages** - **Ultimate Coercivity Performance**: Highest resistance to demagnetization in the Alnico family - **Extreme Temperature Capability**: Reliable performance up to 620°C continuous service - **Enhanced Mechanical Properties**: Superior strength and hardness characteristics - **Exceptional Stability**: Excellent resistance to external magnetic fields and temperature variations - **Premium Quality Consistency**: Tight control of magnetic and physical properties - **Proven Reliability**: Long-term performance stability in critical applications **Technical Note**: A-8S Alnico requires precise orientation control during manufacturing and magnetization processes to achieve optimal anisotropic properties. The enhanced processing and quality control measures ensure more consistent performance across production batches while maintaining the extreme temperature capability and coercivity that characterize the Alnico 8 family. Machining operations demand specialized diamond tools and techniques due to the material's extreme hardness and brittleness. Proper thermal magnetic treatment is essential for developing the full magnetic potential of this premium grade material.

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 3149 gallon liquid totes Special package is available on request.