Alnico Magnets
Alnico Magnet Design, Engineering & Manufacturing
- Technical Magnet Design & Engineering - Our expertise is in the technical design, engineering and custom manufacturing of neodymium magnets and magnetic assemblies, from prototypes to low and high volume production.
- Factory Production Facility - Our fully equipped production facility, along with dedicated assembly areas, enables us to provide complete turnkey solutions while reducing lead times, improving quality at all levels, and lowering costs.
- Quality Planning & Assurance - We provide a full range of inspection and testing services, using state-of-the art equipment to ensure that all of our delivered products adhere to rigid industry standards. Our well-established QMS continuously evolves in order to meet or exceed our clients’ expectations.
- Certifications & Compliance - As a certified magnet manufacturer, we are ISO:9001:2015 , ISO:14001:2015 , ISO:45001:2018 certified, ROHS3 and REACH compliant. Click here to view all of our certifications and compliances.
Alnico Magnets Features & Characteristics
- Grades & Materials - We carry a large inventory of licensed, alnico magnet materials in both standard & premium grades for reduced production and lead times. We offer both cast and sintered alnico magnets in grades ranging from Alnico 2, to Alnico 5 & Alnico 8. Visit our alnico magnet materials page for additional information and data sheets about this material.
- Shapes & Sizes - Sizes for Alnico magnets range from small disc magnets 1/16” in diameter to large cast Alnico magnets weighing up to 500 lbs. Standard shapes include disc, rectangular, channel, horseshoe, rod, and rings in different dimensional specifications. Non-standard shapes can be custom fabricated to specifications from raw stock, and we can custom manufacture virtually any shape & size to your exact specifications.
- Temperature Considerations - Alnico magnets offer the best temperature characteristics of all permanent magnets. They can be used at temperature extremes up to 1,000⁰F (540⁰C), the highest temperature which any magnet material can be used, while retaining 90% of room temperature magnetization.
- Manufacturing Methods - Alnico magnets are hard and brittle, and are therefore prone to chipping and cracking. Cast Alnico magnets may exhibit imperfections such as pores and voids common in cast materials. Typical manufacturing methods for alnico magnet material involves a powdered metallurgical process using rigid steels or rubber molds. Machining or drilling of alnico magnet material cannot be accomplished by ordinary methods and cutting or grinding should be done prior to magnetization. We are fully equipped to machine these materials to your project’s specialty requirements.
- Magnetizing & Assembly Considerations - Because of their low coercivities, alnico magnets require magnetizing fields of only about 3-kilo Oersteds. Special care should be taken to assure that these magnets are not subjected to adverse repelling fields which could partially demagnetize them. It’s therefore recommended to magnetize the material after assembly when combined with circuit components.
- Handling & Storage - Alnico magnets are very strong and brittle and should be stored with “keepers” which close the magnetic field in order to reduce the risk of demagnetization. However, if alnicos become partially demagnetized, they can be easily re-magnetized.
Alnico magnets can be used at very high operating temperatures and offer excellent temperature stability. They have a high-magnetic remanence, and lower coercivity than other magnet materials. Physically, they are less brittle than the neodymium, samarium cobalt and ceramic types of magnets. Alnico magnets are manufactured through either a casting or sintering process. Cast alnico magnets can be made into complex shapes, not possible to achieve with most other manufacturing techniques used for permanent magnet materials.
