Alnico Magnets
Alnico Magnets
High-Temperature Resistant & Stable Magnetic Solutions
As a classic high-performance permanent magnetic material, TOPMAG’s Alnico Magnets are composed of aluminum, nickel, cobalt, and other alloy elements. With outstanding high-temperature resistance (up to 550°C), excellent magnetic stability, and good machinability, they are widely used in high-temperature industrial equipment, aerospace, precision instruments, and other fields that require long-term stable magnetic performance under harsh conditions. Guided by the Chinese headquarters, we adhere to strict production standards to ensure consistent quality and reliable supply for global clients.
Product Categories
TOPMAG’s Alnico Magnets are mainly classified by alloy composition and product shape, covering all mainstream specifications in the industry, and can be customized according to customer needs.
Classification by Alloy Composition (Main Grades):
Alnico 5
Alnico 8
Alnico 9
Classification by Product Shape:
Arc magnets
Horseshoe magnets
Cylinder magnets
Costom shape
Bar magnets
Block magnets
Disc magnets
Ring magnets
Technical Specifications
Customizable according to customer needs, typical parameters of mainstream grades are as follows.
| Grade | Max Energy Product (BH)max | Remanence (Br) Min | Coercivity (HcJ) Min | Max Operating Temp | Typical Application |
|---|---|---|---|---|---|
| Alnico 5 | 3.5-5.0 MGOe (14.5-20.7 kJ/m³) | 1200-1300 mT (12000-13000 Gauss) | 40-50 kA/m (500-625 Oe) | 500°C (932°F) | Precision Instruments |
| Alnico 8 | 5.0-7.0 MGOe (20.7-29.0 kJ/m³) | 1300-1400 mT (13000-14000 Gauss) | 50-60 kA/m (625-750 Oe) | 550°C (1022°F) | Aerospace Components |
| Alnico 9 | 4.5-6.0 MGOe (18.6-25.0 kJ/m³) | 1100-1200 mT (11000-12000 Gauss) | 70-80 kA/m (875-1000 Oe) | 520°C (968°F) | Military Sensors |
Dimensional Tolerance:
±0.01mm (standard), customizable to ±0.005mm for precision requirements; maximum size: length ≤ 500mm, width ≤ 200mm, thickness ≤ 100mm (customizable for larger sizes)
Magnetization Direction:
Axial magnetization, radial magnetization, multi-pole magnetization, custom magnetization direction (according to customer needs)
Surface Treatment:
No coating (standard); optional passivation treatment (for special corrosive environments)
Density & Hardness:
Density: 7.3-7.5 g/cm³ | Hardness: HRC 45-50 (good toughness, machinable)
Core Features
Alnico magnets are prized for their exceptional thermal stability and classic metallic durability, making them the preferred choice for precision instruments and demanding legacy systems. Their enduring value is defined by several distinctive performance characteristics:
Exceptional High-Temperature Resistance
The most prominent advantage of Alnico Magnets, with a maximum operating temperature of up to 550°C (continuous use) and short-term resistance to 600°C, which is far higher than NdFeB Magnets (up to 200°C) and Ferrite Magnets (up to 250°C). No obvious demagnetization occurs even in long-term high-temperature environments, making them ideal for high-temperature working conditions
Excellent Magnetic Stability
With high remanence and stable magnetic performance, the magnetic force attenuation is extremely low (less than 3% in 10 years) under normal use, and there is no risk of sudden demagnetization. It can maintain consistent magnetic performance in complex environments such as humidity, vibration, and electromagnetic interference
Good Machinability
Different from NdFeB and Ferrite Magnets which are brittle and difficult to machine, Alnico Magnets have good toughness and can be processed into various complex shapes through turning, milling, drilling, grinding, and other mechanical processing methods, without easy cracking or damage, reducing processing difficulty and cost for customers
No Coating Required
It has good corrosion resistance and oxidation resistance, and can be used directly in most environments without nickel plating, zinc plating, or other surface coating treatments, simplifying the subsequent use process and reducing additional costs
Adjustable Magnetic Direction
The magnetic direction can be customized according to customer needs (such as axial magnetization, radial magnetization, and multi-pole magnetization), which is flexible and adaptable to different application scenarios
High Mechanical Strength & Durability
Alnico Magnets possess superior mechanical strength and impact resistance compared to brittle NdFeB and Ferrite Magnets, able to withstand mechanical shocks, vibrations, and minor collisions without easy chipping or fracture. This advantage ensures a long service life (up to 20 years under normal industrial use) in harsh working environments, effectively reducing the frequency of magnet replacement and maintenance costs for customers
Quality Assurance
Consistent with TOPMAG’s global quality standards, guided by the Chinese headquarters, we implement strict quality control throughout the entire production process of Alnico Magnets, from raw material selection to finished product delivery, to ensure that each product meets international standards and customer requirements.
| Process Step | Detailed Description |
|---|---|
| 1. Submit Sample Request | Fill in the sample application form on the website, indicating the required shape, grade, size and surface treatment |
| 2. Sample Confirmation | Our technical team will confirm the sample details with you within 24 hours and issue a sample quotation (freight only) |
| 3. Sample Delivery | After payment of freight, we will ship the sample within 3-5 working days; Provide tracking number for inquiry |
| 4. Test & Feedback | You can conduct performance tests on the sample; Our team provides technical support for test results |
| 5. Mass Order | After sample confirmation, we will arrange mass production according to the sample standards, ensuring consistent quality |
Sample Center
The Chinese headquarters strictly selects high-purity aluminum, nickel, cobalt, and other alloy raw materials, and conducts strict inspection on raw material composition, purity, and performance to eliminate unqualified raw materials from the source.
Adhere to the ISO 9001 quality management system standards, and the Chinese headquarters dispatches professional technical personnel to supervise the entire production process (smelting, casting, heat treatment, machining, magnetization, testing), ensuring that each process meets the standard requirements and the product quality is consistent.
Each batch of Alnico Magnets undergoes rigorous multi-dimensional testing at the Chinese quality control center, including magnetic performance (magnetic energy product, remanence, coercivity), dimensional accuracy, high-temperature resistance, machinability, and corrosion resistance. A detailed inspection report issued by the Chinese headquarters is attached to each shipment.
We have a professional R&D and technical team at the Chinese headquarters, which can provide customized R&D, production, and technical support according to customer needs (such as special grades, special shapes, special magnetization directions). The whole process is tracked and served to ensure that the customized products fully meet the application requirements.
Provide global after-sales service, and the Chinese headquarters technical team will quickly respond to customer quality feedback and technical questions, providing professional solutions to ensure customer use experience.
Looking for a reliable Alnico magnet supplier? Contact TOPMAG now! We provide customized solutions based on your specific application requirements, including shape, grade, surface treatment and performance customization. Professional technical team, 24-hour online consultation, global logistics support.
Widely Applications
Relying on its unique high-temperature resistance, stable magnetic performance, and good machinability, TOPMAG’s Alnico Magnets are widely used in high-end manufacturing, aerospace, precision instruments, and other fields that have strict requirements on magnetic performance and working environment, covering both industrial and special fields.
• Aerospace & Aviation——Used in aircraft engine components, aerospace sensors, navigation instruments, and satellite auxiliary magnetic components. It can maintain stable magnetic performance under extreme high-temperature, high-pressure, and high-vibration environments, ensuring the normal operation of aerospace equipment
• High-Temperature Industrial Equipments——Applied to high-temperature motors, furnace sensors, heat treatment equipment, and high-temperature magnetic separators in metallurgy, chemical industry, and other industries. It can work stably for a long time at 400-550℃, solving the problem of magnetic material demagnetization under high-temperature conditions.
• Precision Instruments & Meters——Core components of galvanometers, voltmeters, ammeters, pressure gauges, and other precision instruments. With stable magnetic performance and high dimensional accuracy, it ensures the measurement accuracy and service life of the instruments
• Electronic & Electrical Industry——Used in high-end speakers, microphones, magnetic sensors, electromagnetic relays, and other products. It has good frequency response and stable magnetic force, improving the performance and reliability of electronic products
• Military & Defense——Applied to military communication equipment, radar components, missile guidance systems, and military sensors. It has strong anti-interference ability and stable performance, meeting the strict requirements of military equipment
• Other Fields——Also used in magnetic tools, teaching instruments, medical equipment (high-temperature disinfection magnetic components), and other fields, with a wide range of applications
