Alnico Magnets

Alnico was developed in the early 1930’s. During World War II it was used in military electronic applications. After the war it quickly spread into civilian versions of those applications and replaced magnet steel in many applications. High induction levels with good resistance to demagnetization and stability, due to its low temperature coefficient (0.02% / °C), at a reasonable cost made Alnico the magnet material of choice.

Alnico-Magnets

Alnico-Magnets

A high working temperature limit (550 °C / 1020 °F) makes Alnico especially well suited for sensitive automotive and aircraft sensor applications. Alnico is produced in many grades to fit the requirements of these applications, from Alnico 1 to Alnico 12, but the most popular grades are 2, 5 and 8. By comparison to newer materials, the coercivity of Alnico is low.

Where Alnico is appropriate, magnet size can be minimized if it can be magnetized after assembly into the magnetic circuit. If used independent of other circuit components, as in security applications, the effective length to diameter ratio (related to the permeance coefficient) must be great enough to cause the magnet to work above the knee in its second quadrant demagnetization curve. For critical applications, Alnico magnets may be calibrated to an established reference flux density value. A by-product of low coercivity is sensitivity to demagnetizing effects due to external magnetic fields, shock, and application temperatures. For critical applications, Alnico magnets can be temperature stabilized to minimize these effects.

Alnico magnet material is made by alloying aluminum, nickel and cobalt with iron. Some grades also contain copper and/or titanium. The alloying process is casting or sintering. The process and the heat treatment needed to optimize magnetic properties produces hard (Rc45) and brittle parts that are best shaped or finished by abrasive grinding. Cast parts are generally under 70 pounds and may be used as-is, but polar surfaces are usually ground flat and parallel. Sintering is confined to high volume parts in sizes under one cubic inch and an effective press length to diameter ratio under four.

Alnico-Gussmagnet

Alnico-Gussmagnet

To minimize the volume of magnet material required by an application, the entire magnetic circuit must be considered. An optimized circuit design results in a circuit permeance coefficient that causes the magnet to operate above the knee of its demagnetization curve by a margin large enough to offset anticipated operating demagnetizing effects. Optimized steel components result in an effective magnetic length greater than the magnet itself, but this is only effective if the magnet can be magnetized after assembly into the circuit. The alternate is to design the magnet shape to produce a load line, on its own, that intersects the BH curve above its knee, so minimal flux is lost due to the self demagnetizing factor upon removal from the magnetizing fixture. In either case, a magnetizing force of 3.0 kOe must be applied to Alnico 5 magnets and 7.0 kOe for Alnico 8. When magnetized in a magnetic circuit, the magnetizing pulse must be wide enough to allow eddy currents in the steel to decay before dropping below these values.

Alnico 5 Channel Magnet

Casting Alnico 5 Channel Magnet

Casting Alnico 5 Channel Magnet, Rectangular Channel Alnico Magnet, Cast Alnico Channel Shaped Magnets, Rectangle Alnico Channel Bar Magnet, Casting Alnico Custom Channel-shape Magnet China Factory Casting Alnico 5 Channel Magnet Feature: Part No.: HSACM-E05 Alnico Channel Grade 5 material, unpainted gray in color and have a maximum temperature of 550 degrees C Length tolerance […]

Rectangular Channel Alnico Magnet

Rectangular Channel Alnico Magnet

Rectangular Channel Alnico Magnet, Cast Alnico Channel Shaped Magnets, Rectangle Alnico Channel Bar Magnet, Casting or Sintered Alnico Channels, Channel-shape C5 Cast Alnico Magnet China Factory Cast Rectangular Channel Alnico Magnet Feature: Part No.: HSACM-E04 Alnico Channel Grade C5 material, unpainted gray in color and have a maximum temperature of 550 degrees C Length tolerance […]

Cast Alnico Channel Magnet

Cast Alnico Channel Magnet

Cast Alnico Channel Magnet, Rectangle Alnico Channel Magnet, Casting Alnico Channel Bar Magnets, Alnico Channel Magnets, Sintered Alnico Channels, Alnico Channel Horseshoe Magnet, Cast Alnico Magnet Channel C5 China Supplier Cast Alnico Channel Magnet Feature: Part No.: HSACM-E03 Alnico Channel Grade C5 material, unpainted gray in color and have a maximum temperature of 550 degrees […]

Rectangle Alnico Channel Magnet

Rectangle Alnico Channel Magnet

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Alnico Channel Bar Magnets

Alnico Channel Bar Magnets

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AlNiCo Block Magnets

AlNiCo Block Magnets

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Customized Cast Alnico Magnets

Customized Cast Alnico Magnets

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Custom Sintered Alnico Magnets

Custom Sintered Alnico Magnets

Custom Sintered Alnico Magnets, Sintered Aluminum Nickel Cobalt Magnets, Sintering Alnico Permanent Magnet, Customized Alnico Magnet China Supplier and Manufacturer Sintered Alnico Magnets – Alnico is composed primarily of aluminum (Al), nickel (Ni) and cobalt (Co). Alnico alloys are ferromagnetic, with a high coercivity (resistance to loss of magnetism). Before the development of rare earth magnets in the 1970s, they […]

Bar Alnico Magnets

Bar Alnico Magnets

Bar Alnico Magnets, Alnico bars, Alnico Square Bar Magnet, High Magnetic Cast Alnico Round Bar Magnet, Strong Holding Bar Magnet Casting Alnico China Supplier Bar Alnico Magnets  offer excellent temperature stability, high residual induction, and relatively high energies. Features include: • Temperature stability in high thigh-temperature applications, and a maximum working temperature of approximately 1000°F • […]

Alnico Channel Magnets

Alnico Channel Magnets

Alnico Channel Magnets, Alnico channels, Alnico Channel Bar Magnet, High Magnetic Cast Alnico Channel Magnet, Strong Bar Holding Channel Magnet China Supplier Alnico channel magnets can be used for various holding applications and also for removal of tramp iron from chutes carrying grains, plastics, glass, minerals & other materials conveyed in powder or granular form. Alnico channel […]

AlNiCo Rod Magnets

AlNiCo Rod Magnets

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Alnico Multipole Magnets

Alnico Multipole Magnets

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Alnico Rotor Magnets

Alnico Rotor Magnets

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Alnico Holding Magnets

Alnico Holding Magnets

Alnico Holding Magnets, Deep Holding Alnico Magnets Assembly, Permanent Alnico Magnet, Customized Holding Alnico Shallow Pot Magnet, Cast Alnico Magnet China Supplier Alnico Holding Magnets – What is Alnico? Alnico is an acronym referring to aluminum (Al), nickel (Ni) and cobalt (Co). These elements are combined with iron, copper and sometimes titanium to create permanent magnets that […]

Alnico Horseshoe Magnets

Alnico Horseshoe Magnets

Alnico Horseshoe Magnets, Alnico U-shaped Magnets, Holding Horseshoe Alnico Magnets, Cast and Sintered Alnico, Horseshoe Permanent Magnets China Supplier Alnico Horseshoe Magnets – Alnico Magnets Alnico delivers impressive flux density at an economical price. It boasts the lowest reversible temperature coefficient of any standard commercial magnet material (0.02% per degree centigrade) allowing for excellent stability over a wide temperature […]

Alnico Ring Magnets

Alnico Ring Magnets

Alnico Ring Magnets, Ring Alnico Permanent Magnets, Sintered Alnico Ring Magnet, Alnico alloy magnet, Cast AlNICo Magnet China Factory Supplier Alnico Ring Magnets – What is the Alnico Magnet? Alnico magnet is an acronym referring to a family of iron alloys which in addition to iron are composed primarily of aluminium (Al), nickel (Ni) and cobalt (Co), hence […]

Permanent Bar Magnet for Firebird Mini Humbucker

Permanent Bar Magnet for Firebird Mini Humbucker, Alnico Bar Magnet for Firebird Mini Humbucker Pickup, Mini Humbucker Pickups Fully Magnetized Alnico Bar Magnet * Permanent Magnet Merial: AlNiCo 2/ Alnico 3/ Alnico 4 / Alnico 5 /Alnico 8 * Size: 2-3/32″ x 5/16″ x 1/8″ (53.18mm x 7.98mm x 3.18mm) (approx) * Polished:  Polished or Unpolished (rough cast, sand cast) * For humbucker and P90 […]

Magnetic Spacers for Humbucker Pickup Makers

Magnetic Spacers for Humbucker Pickup Makers

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Customer Guitar Pickup Alnico Bar Humbucker Magnets

Customer Polished Guitar Pickup Alnico Bar Humbucker Magnets

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Customer Rough Cast Alnico Bar Magnets for Humbucker and Pickup

Customer Rough Cast or Vingate PAF Alnico Bar Magnets

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