Alnico Magnets

Alnico magnets derive their magnetic properties and name from these elements – ALuminum, NIckel, and CObalt. Alnico magnets are manufactured using a powder metallurgy process (sintered alnico) or a foundry process (cast alnico). They have the widest range of temperature stability of any standard magnetic material. Other characteristics include high residual induction as well as relatively high energies. The corrosion resistance of alnico is considered excellent and no surface treatments are required, but alnico magnets can be easily plated.

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37 Results

Part #	Category	Price
BM1054	Alnico Pot Magnets, Shallow	$8.36	Alnico Pot Magnets, Shallow quantity QTY DISCOUNT PRICE
BM1057	Alnico Pot Magnets, Shallow	$13.13	Alnico Pot Magnets, Shallow quantity QTY DISCOUNT PRICE
BM1059	Alnico Pot Magnets, Shallow	$12.68	Alnico Pot Magnets, Shallow quantity QTY DISCOUNT PRICE
BM1070X1/2	Alnico Pot Magnets, BM10 Series, Imperial	$0.34	Alnico Pot Magnets, BM10 Series, Imperial quantity QTY DISCOUNT PRICE
BM1071X1/2	Alnico Pot Magnets, BM10 Series, Imperial	$5.19	Alnico Pot Magnets, BM10 Series, Imperial quantity QTY DISCOUNT PRICE
BM1072X1/2	Alnico Pot Magnets, BM10 Series, Imperial	$13.63	Alnico Pot Magnets, BM10 Series, Imperial quantity QTY DISCOUNT PRICE
BM1073X1/2	Alnico Pot Magnets, BM10 Series, Imperial	$6.15	Alnico Pot Magnets, BM10 Series, Imperial quantity QTY DISCOUNT PRICE
BM1076X1	Alnico Pot Magnets, BM10 Series, Imperial	$18.44	Alnico Pot Magnets, BM10 Series, Imperial quantity QTY DISCOUNT PRICE
BM1076X1/2	Alnico Pot Magnets, BM10 Series, Imperial	$14.07	Alnico Pot Magnets, BM10 Series, Imperial quantity QTY DISCOUNT PRICE
BM1076X3/4	Alnico Pot Magnets, BM10 Series, Imperial	$17.76	Alnico Pot Magnets, BM10 Series, Imperial quantity QTY DISCOUNT PRICE
BM1077X3/4	Alnico Pot Magnets, BM10 Series, Imperial	$15.5	Alnico Pot Magnets, BM10 Series, Imperial quantity QTY DISCOUNT PRICE
CC812	Alnico Channel Magnets, 2-Hole, 2.25in	$61.75	Alnico Channel Magnets, 2-Hole, 2.25in quantity QTY DISCOUNT PRICE
CO1452	Alnico Pot Magnets, BM10 Series, Imperial	$27.52	Alnico Pot Magnets, BM10 Series, Imperial quantity QTY DISCOUNT PRICE
CU618	Alnico U-Shaped Magnet, Wide Core, Grade 5	$99.72	Alnico U-Shaped Magnet, Wide Core, Grade 5 quantity QTY DISCOUNT PRICE
CU635	Alnico U-Shaped Magnet, Round, Bevelled Cutout, Grade 5	$14.6	Alnico U-Shaped Magnet, Round, Bevelled Cutout, Grade 5 quantity QTY DISCOUNT PRICE
MAG829	Alnico Pot Magnets, Deep	$1.83	Alnico Pot Magnets, Deep quantity QTY DISCOUNT PRICE
MAG832N	Alnico Pot Magnets, Deep	$5.65	Alnico Pot Magnets, Deep quantity QTY DISCOUNT PRICE
MAG833	Alnico Pot Magnets, Deep	$10.39	Alnico Pot Magnets, Deep quantity QTY DISCOUNT PRICE
MAG834	Alnico Pot Magnets, Deep	$12.15	Alnico Pot Magnets, Deep quantity QTY DISCOUNT PRICE
SB-8010	Alnico Rectangular Magnets	$1.74	Alnico Rectangular Magnets quantity QTY DISCOUNT PRICE
SP-8312	Alnico Disc Magnets	$4.83	Alnico Disc Magnets quantity QTY DISCOUNT PRICE
SP940	Alnico Rotor Magnets	$29.21	Alnico Rotor Magnets quantity QTY DISCOUNT PRICE
SP942	Alnico Rotor Magnets	$122.36	Alnico Rotor Magnets quantity QTY DISCOUNT PRICE
SU1607	Alnico U-Shaped Magnet, Square Cutout, Grade 2	$1.22	Alnico U-Shaped Magnet, Square Cutout, Grade 2 quantity QTY DISCOUNT PRICE
CC816	Alnico Channel Magnets, Rounded	$28.93	Alnico Channel Magnets, Rounded quantity QTY DISCOUNT PRICE
CU605	Alnico Horseshoe Magnets, Wide, Grade 5	$15.16	Alnico Horseshoe Magnets, Wide, Grade 5 quantity QTY DISCOUNT PRICE
CU609	Alnico U-Shaped Magnet, Block, Grade 5	$4.66	Alnico U-Shaped Magnet, Block, Grade 5 quantity QTY DISCOUNT PRICE
CU610	Alnico U-Shaped Magnet, Round Base, Grade 5	$35.07	Alnico U-Shaped Magnet, Round Base, Grade 5 quantity QTY DISCOUNT PRICE
CU611	Alnico U-Shaped Magnet, Flat Lateral Surfaces, Grade 5	$20	Alnico U-Shaped Magnet, Flat Lateral Surfaces, Grade 5 quantity QTY DISCOUNT PRICE
SD-8202	Alnico Ring Magnets, Grade 8H	$2.32	Alnico Ring Magnets, Grade 8H quantity QTY DISCOUNT PRICE
SP-8302	Alnico Disc Magnets	$0.27	Alnico Disc Magnets quantity QTY DISCOUNT PRICE
SP-8309	Alnico Disc Magnets	$4.98	Alnico Disc Magnets quantity QTY DISCOUNT PRICE
SP-8308	Alnico Disc Magnets	$2.91	Alnico Disc Magnets quantity QTY DISCOUNT PRICE
SP-8305	Alnico Disc Magnets	$1.43	Alnico Disc Magnets quantity QTY DISCOUNT PRICE
SP-8306	Alnico Disc Magnets	$2.13	Alnico Disc Magnets quantity QTY DISCOUNT PRICE
SP-8310	Alnico Disc Magnets	$3.11	Alnico Disc Magnets quantity QTY DISCOUNT PRICE
SP-8311	Alnico Disc Magnets	$4.66	Alnico Disc Magnets quantity QTY DISCOUNT PRICE

FAQs

Alnico Magnetic Material

Alnico is hard and brittle, and prone to chipping and cracking. Special machining techniques must be used to machine this material. Alnico magnets require magnetizing fields of about 3 kOe (kilo Oersted). Because of their relatively low coercivities, special care should be taken to assure that alnico magnets are not subjected to adverse repelling fields, since these could partially demagnetize the magnets. Magnetized magnets should be stored with “keepers” to reduce the possibility of partial demagnetization. If alnico magnets are partially demagnetized, they may be easily re-magnetized.

What is Sintered Alnico?

Sintered alnico magnets are manufactured by compacting fine alnico powder in a press, and then sintering the compacted powder into a solid magnet. Sintered alnico has marginally lower magnetic properties, but better mechanical properties, than cast alnico. Both are hard and brittle materials and require skillful machining on specialized equipment. It is generally not recommended that these materials be used for structural or decorative purposes. Alnico magnets can be pressed directly into non-magnetic materials. For steel pressings, they should be enclosed in a nonferrous bushing. Sintered alnico 8H has a high temperature stability, coercivity, and demagnetization resistance similar to Cast alnico 8, but it can be manufactured to closer tolerances. Its fine grain structure results in highly uniform flux distribution and mechanical strength, so it is ideally suited to applications requiring short magnetic length or involving high-speed motion. Some applications include core meters, traveling wave tube stacks, polarized relays, reed switches, torque transmitting devices, and sandwich-type holding assemblies.

What Are Cast Alnico Magnets?

Cast alnico magnets are manufactured by pouring a molten metal alloy into a mold and then processing it through various heat-treat cycles. The resulting magnet has a dark gray appearance and may have a rough surface. Machined surfaces have a shiny appearance similar to steel. Cast magnets may be manufactured in complex shapes such as horseshoes, which is not possible with other magnet materials.

Types of Cast Alnico Magnets

Cast Alnico 5 – This is the most commonly used. This alnico material is used extensively in rotating machinery, meters, instruments, sensing devices, and holding applications, to name a few. For best results with alnico 5 magnets, the length should be no less than 5 times the cross-section diameter; or 5 times the diameter of a circle equal in area to the cross section.

Cast Alnico 8 HE – This magnet has the highest temperature stability of any commercially available magnetic material. Improved crystal structure and alloying techniques achieve a 6.0 energy product and high resistance to demagnetization. Typical uses include computer keyboards, drives, printers, microphones, meters, motors, generators, relays, reed-switch relays, and transducers.

The Benefits of Alnico Magnets

Alnico magnets derive their magnetic properties and name from these elements – ALuminum, NIckel, and CObalt. They have the widest range of temperature stability of any standard magnetic material – up to 1,000°F, at which approximately 85% of room temperature magnetization is retained. Temperature changes above this are largely structural and not fully reversible or re-magnetizable. Alnico magnets are manufactured using a powder metallurgy process (sintered alnico) or a foundry process (cast alnico). Other characteristics include high residual induction as well as relatively high energies. The corrosion resistance of alnico is considered excellent and no surface treatments are required, but alnico magnets can be easily plated.

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FAQs

Types of Cast Alnico Magnets