AlNiCo

AlNiCo, Sintered And Cast Alnico Magnets, Guitar AlNiCo Pickup, Alnico Rods and Bars, Educational Alnico Horseshoe Magnet, Alnico Channel Magnet, Holding Magnets, Heavy-duty Alnico Magnets China Supplier and Factory

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.

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.

alnico

alnico

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.

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.

Circumferentially Oriented Magnets in Hysteresis Coupling

Circumferentially Oriented Magnets in Hysteresis Coupling

Circumferentially Oriented Magnets in Hysteresis Coupling, circumferential direction ring Alnico magnets for hysteresis systems Circumferentially Oriented Magnets in Hysteresis Coupling – In theory, closed circuit means the magnet does not have any exposed poles and will not generate the external magnetic field, then applies no useful application. But in reality, circumferentially oriented magnets can be […]

Alnico 5 Polished Pickup Humbucker Bar Magnet

Alnico 5 Polished Pickup Humbucker Bar Magnet

Fully Magnetized Alnico 5 Polished Pickup Humbucker Bar Magnet, Cast Alnico A5 Bar Guitar Pickup Magnet, Alnico V Magnets FOR Humbucker Pickup Makers or P90 Pickup, Replacement Narrow Alnico Bar smooth humbuckering magnets, original PAF mags cast Alnico magnet China supplier Fully Magnetized Polished AlNiCo 8 Bar Humbucker Magnet Parameters: Part No.  MP-GPBMA5 series Permanent […]

Fully Magnetized Polished AlNiCo 8 Bar Humbucker Magnet

Fully Magnetized Polished AlNiCo 8 Bar Humbucker Magnet

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Cast Alnico 4 Bar Guitar Pickup Magnet Magnetized

Cast Alnico 4 Bar Guitar Pickup Magnet Magnetized

Cast Alnico 4 Bar Guitar Pickup Magnet Magnetized, Alnico 4 Magnets FOR Humbucker Pickup Makers, Replacement Alnico Magnet Spacers for Humbucker or P90 Pickup, Narrow Alnico Bar smooth humbucker magnets, original PAF mags cast Alnico Magnet China Factory Cast Alnico 4 Bar Guitar Pickup Magnet Magnetized Part No.  MP-GPBMA4 series, Fully magnetized Alnico 4 bar […]

Alnico 3 Humbucker Pickup Magnets

Alnico 3 Humbucker Pickup Magnets

Alnico 3 Humbucker Pickup Magnets, guitar pickup’s magnet, Pro quality polished cast Alnico 3 bar magnet for humbucker and P90 pickups, Roughcast magnets, smooth humbucker magnets, original PAF mags cast Alnico 3 Magnet China Factory Alnico 3 Humbucker Pickup Magnets Part No.  MP-GPBMA3 series, Characteristics: Similar to Alnico 2 but a bit brighter with clear […]

Unpolished Cast Alnico 2 Bar Magnet

Unpolished Cast Alnico 2 Bar Magnet

Unpolished Cast Alnico 2 Bar Magnet, guitar pickup’s magnet, Pro quality unpolished cast Alnico 2 bar magnet for humbucker and P90 pickups, Roughcast magnets, rough vs. smooth humbucker magnets, original PAF mags rough sand cast Alnico 2 Magnet Characteristics: Alnico 2 Bar Magnet produce warm and very vintage sounding tones, generally has more mid tones. In […]

D70mmxd50mmx20mm Casting AlNiCo Speaker Magnet

D70mmxd50mmx20mm Casting AlNiCo Speaker Magnet

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AlNiCo Ring Magnet for Speaker

OD50mmxID40mmxT10mm AlNiCo Ring Magnet for Speaker

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10000 Gauss Strong Block Square AlNiCo Magnet

10000 Gauss Strong Block Square AlNiCo Magnet

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Cast Alnico 5 Bridge Magnet with Two Through Holes 3.125 W x 2.090 H

Cast Alnico 5 Bridge Magnet with Two Through Holes 3.125″ W x 2.090″ H

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Powerful Alnico 5 A5 Grade Bridge Magnet 2.750 W x 1.625 H

Powerful Alnico 5 A5 Grade Bridge Magnet 2.750″ W x 1.625″ H

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Red Painted Alnico Bridge Magnets 2.250 W x 1.375 H

Red Painted Alnico Bridge Magnets 2.250″ W x 1.375″ H

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Alnico Pot Magnets with Bridge One Through Hole

Alnico Pot Magnets with Bridge One Through Hole

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Bar AlNiCo 2 Magnets for Humbucker

Bar AlNiCo 2 Magnets for Humbucker

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Replacement Bar Guitar AlNiCo Magnets

Replacement Bar Guitar AlNiCo Magnets

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60mmx13mm Magnetized Alnico 5 Humbucker Guitar Pickup Magnet

60mmx13mm Magnetized Alnico 5 Humbucker Guitar Pickup Magnet

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Rectangle Cast Grade 5 Channel Alnico Magnet

Rectangle Cast Grade 5 Channel Alnico Magnet

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Channel Rectangular Alnico Magnet

Channel Rectangular Alnico Magnet

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Alnico Channel Bar Magnets

Alnico Channel Bar Magnets

Alnico Channel Bar Magnets, Cast Alnico 5 U-Channel Magnets, Rectangular Alnico Magnet, U-shaped Alnico Magnet Channel Grade5 Casting Channel Magnets, Sintered Alnico Channel Bar Magnet China Factory Manufacturer Alnico Channel Bar Magnets  Item No. MPACNL-03 series Alnico Channel Grade 5 material, unpainted gray in color and have a maximum temperature of 550 degrees C / […]

Cast Alnico 5 Alnico Channel Magnet

Cast Alnico 5 Alnico Channel Magnet

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Alnico U-Channel Magnets

Alnico U-Channel Magnets

Alnico U-Channel Magnets, Casting Alnico 5 Channel Magnet, Rectangular Channel Alnico Magnet, Cast Alnico Channel Shaped Magnets, Rectangle Alnico Channel Bar Magnet China Manufacturer Alnico U-Channel Magnets Item No. MPACNL-01 series Alnico Channel Grade 5 material, unpainted gray in color and have a maximum temperature of 550 degrees C / Max.Temperature, 1020 °F Length tolerance […]

2-Poles Rotor AlNiCo Magnet in Mounting Shafts

2-Poles Rotor AlNiCo Magnet in Mounting Shafts

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4-Poles Cast AlNiCo Magnet for Rotor

4-Poles Cast Multi-Polar AlNiCo Magnet for Rotor Turbine Generator

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Multi-Poles Rotor Magnet Permanent AlNiCo Six-Poles

Multi-Poles Rotor Magnet Permanent AlNiCo Six-Poles

Multi-Poles Rotor Magnet Permanent AlNiCo Six-Poles, AlNiCo Rotor Magnet 6-Poles for Synchronous Motor, Cast Alnico Motor Rotor Magnet System, Multi-Poles AlNiCo Magnets for Rotor, Al-Ni-Co rotor shaft magnet, Permanent alnico 5 rotor magnet, Six Multi Polar Alnico Magnetic Rotor Core, custom alnico rotor magnet China Supplier Multi-Poles Rotor Magnet Permanent AlNiCo Six-Poles Paramenters Part No.  […]

Disc Alnico Magnet for Sensor Ø20mm x 10mm

Disc Alnico Magnet for Sensor Ø20mm x 10mm

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Alnico Disc Ø12mm x 5mm

Alnico Disc Ø12mm x 5mm

Alnico Disc Ø12mm x 5mm, sensitive automotive and aircraft sensor Alnico magnets, Alnico 5 Mounted Polepiece Magnets for Guitar Pickup, Alnico Disc Magnets for Pressure Sensor, Light Sensor, Ultrasonic Sensor, Smoke, Gas and Alcohol Sensor, Touch Sensor Alnico Disc Ø12mm x 5mm Parameters: Diameter 12mm Thickness 5mm Direction Of Magnetism Through Thickness Magnet Type Alnico […]

Uncoated Magnetic AlNiCo Rectangular Bar 150mm X 12mm X 6mm

Uncoated Magnetic AlNiCo Rectangular Bar 150mm X 12mm X 6mm

Uncoated Magnetic AlNiCo Rectangular Bar 150mm X 12mm X 6mm, Buy AlNiCo Block Shape Permanent Magnet, Uncoated AlNiCo Block Bar Magnet, sintered or casting Alnico Square / Rectangular Bar Magnets, Magnetic Alnico Blocks & Bars China supplier factory Uncoated Magnetic AlNiCo Rectangular Bar 150mm X 12mm X 6mm Parameter: Product No.: MPBAM-1501206 Length: 150mm Width: […]

Buy Magnet AlNiCo Block 75mm X 12mm X 6mm

Buy Magnet AlNiCo Block 75mm X 12mm X 6mm

Buy Magnet AlNiCo Block 75mm X 12mm X 6mm, Block Shape AlNiCo Permanent Magnet Uncoated AlNiCo Block Bar Magnet, aluminum-nickel-cobalt, Alnico Square / Rectangular Bar Magnets, Magnetic Alnico Blocks & Bars China supplier factory Buy Magnet AlNiCo Block 75mm X 12mm X 6mm Parameter: Product No.: MPBAM-751206 Length: 75mm Width: 12mm Thickness: 6mm Magnet Type: […]