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Square Alnico magnets take rectangular blocks as their basic shape, with dimensions defined by length, width and thickness. They deliver stable and reliable magnetic performance, and their magnetic force is barely affected by temperature changes, making them suitable for working conditions requiring consistent magnetic fields and with drastic ambient temperature fluctuations.
Compared with NdFeB and Samarium-Cobalt magnets, Alnico magnets have a relatively lower magnetic energy product, yet excel in temperature stability and anti-demagnetization performance. They are especially ideal for high-temperature, precision and long-term stable operation scenarios.
Performance Grades: Please refer to our full Alnico grade performance table.
Magnetization Direction: Customizable based on customers’ equipment magnetic circuit structure.
Composed mainly of metal elements including aluminum, nickel, cobalt, iron and copper, square Alnico magnets are manufactured through high-temperature smelting, casting or sintering processes. Different grades achieve distinct magnetic properties and temperature stability by adjusting metal proportions and heat treatment procedures.
Alnico magnets are mainly divided into cast Alnico and sintered Alnico. Cast Alnico features stable internal structure and relatively low cost, suitable for general industrial applications; sintered Alnico has more uniform internal microstructure and consistent magnetic performance, ideal for precision instruments and scenarios with high-performance requirements.
Cast Alnico: Raw material proportioning → smelting → casting → heat treatment → precision machining → surface treatment → magnetization for finished products
Sintered Alnico: Raw material proportioning → powder blending → compression molding → sintering → heat treatment → machining → surface treatment → magnetization for finished products
Square magnets can be precisely sized via cutting, grinding, chamfering, drilling and other machining processes.
Alnico magnets possess strong natural oxidation resistance, and passivation treatment meets protection needs for standard working environments. For scenarios with strict requirements on appearance and anti-corrosion performance, nickel plating, zinc plating or epoxy coating are optional to improve surface smoothness and environmental adaptability.
Precision instruments, temperature sensors, motors, electro-acoustic components, relays, magnetic chucks, high-temperature equipment, petroleum instruments, aerospace accessories, military electronics, various magnetic systems requiring long-term stable magnetic fields, etc.
