Excellent, Professional, Innovative

sales@epimagnets.com

Search
Main Menu

AlNiCo Magnets

Get A Quote

Alnico magnets, made primarily of aluminum, nickel, and cobalt, are known for their unique combination of impressive features, such as high-temperature stability, corrosion resistance, and strong magnetic properties. These characteristics make Alnico magnets an ideal choice for a diverse array of industries, including aerospace, automotive, music and audio, medical, and industrial sectors.

EPI Magnets has been a leader in the magnetic industry for over 20 years, providing clients with reliable and economical magnetic solutions tailored to their needs. Our expertise in Alnico magnets, a classic and versatile choice in magnet materials, allows us to offer a wide range of high-quality products that deliver exceptional performance across various applications.

Product Details

Types of Alnico Magnets

We offer both Cast and Sintered Alnico Magnets, allowing you to choose the ideal type for your specific application.

  • Cast Alnico Magnets: Known for their complex shapes and high magnetic output, Cast Alnico magnets can be produced in a variety of sizes and configurations, including rods, horseshoes, and other intricate designs. They exhibit excellent temperature stability and low coercivity.
  • Sintered Alnico Magnets: Offering excellent mechanical strength and dimensional stability, Sintered Alnico magnets are perfect for applications requiring precision and durability. Although they have lower magnetic properties compared to Cast Alnico, they exhibit increased mechanical strength and can be produced with tighter tolerances.

Grade of Alnico Magnets

The grade range for AlNiCo magnets spans from 2.0 MGOe to 9.0 MGOe. The most commonly used grades are AlNiCo5 and AlNiCo6. Sintered AlNiCo8, sintered AlNiCo6, and sintered AlNiCo5 are suitable for applications with smaller and less complex geometric shapes.

GradeMMPABrHcb(BH)maxTcTwT.C. a(Br)T.C.a(Hcj)
mT / GskA/m / OekJ/m3 / MGOe℃℃%/℃%/℃
FLN8S.ALNICO3500 / 500040 / 5008 / 1.00760450-0.02-0.03~+0.03
FLNG12S.ALNICO2650 / 650048 / 60012 / 1.50800~850450-0.02-0.03~+0.03
FLNGT18S.ALNICO7600 / 600090 / 113018 / 2.20800~850450-0.02-0.03~+0.03
FLNG34S.ALNICO51200 / 1200048 / 60034 / 4.25800~850450-0.02-0.03~+0.03
FLNGT28S.ALNICO61050 / 1050056 / 70028 / 3.50800~850450-0.02-0.03~+0.03
FLNGT38S.ALNICO8800 / 8000110 / 130038 / 4.75800~850450-0.02-0.03~+0.03
FLNGT42S.ALNICO8850 / 8500120 / 150042 / 5.25800~850450-0.02-0.03~+0.03
FLNGT33JS.ALNICO8HC700 / 7000140 / 175033 / 4.13800~850450-0.02-0.03~+0.03
Grade MMPA Br Hcb (BH)max Tc Tw T.C a(Br) T.C.a(Hcj)
mT / Gs kA/m / Oe k/m3 / MGOe ℃ ℃ %/℃ %/℃
LN10 ALNICO3 600 / 6000 40 / 500 10 / 1.25 750 550 -0.02 -0.03~+0.03
LNG10 600 / 6000 44 / 550 10 / 1.25 750 550 -0.02 -0.03~+0.03
LNG12 ALNICO2 700 / 7000 44 / 550 12 / 1.50 800~850 550 -0.02 -0.03~+0.03
LNG13 680 / 6800 48 / 600 13 / 1.63 800~850 550 -0.02 -0.03~+0.03
LNG16 ALNICO4 800 / 8000 48 / 600 16 / 2.00 800~850 550 -0.02 -0.03~+0.03
LNG18 900 / 9000 48 / 600 18 / 2.25 800-850 550 -0.02 -0.03~+0.03
LNG37 ALNICO5 1200 / 12000 48 / 600 37 / 4.63 800~850 550 -0.02 -0.03~+0.03
LNG40 1230 / 12300 48 / 600 40 / 5.00 800~850 550 -0.02 -0.03~+0.03
LNG44 1250 / 12500 52 / 650 44 / 5.50 800~850 550 -0.02 -0.03~+0.03
LNG48 ALNICO5DG 1280 / 12800 56 / 700 48 / 6.00 800~850 550 -0.02 -0.03~+0.03
LNG52 1300 / 13000 56 / 700 52 / 6.50 800~850 550 -0.02 -0.03~+0.03
LNG56 ALNICO5-7 1300 / 13000 58 / 720 56 / 7.00 800~850 550 -0.02 -0.03~+0.03
LNG60 1330 / 13300 60 / 750 60 / 7.50 800~850 550 -0.02 -0.03~+0.03
LNGT28 ALNICO6 1000 / 10000 56 / 700 28 / 3.50 800~850 550 -0.02 -0.03~+0.03
LNGT30 1100 / 11000 56 / 700 30 / 3.75 800-850 550 -0.02 -0.03~+0.03
LNGT18 ALNICO8 580 / 5800 80 / 1000 18 / 2.25 800~850 550 -0.02 -003~+0.03
LNGT32 800 / 8000 100 / 1250 32 / 4.00 800~850 550 -0.02 -0.03~+0.03
LNGT38 800 / 8000 110 / 1380 38 / 4.75 800-850 550 -0.02 -0.03~+0.03
LNGT44 850 / 8500 115 / 1450 44 / 5.50 800~850 550 -0.02 -0.03~+0.03
LNGT48 ALNICOBHE 900 / 9000 120 / 1500 48 / 6.00 800~850 550 -0.02 -0.03~+0.03
LNGT60 ALNICO9 900 / 9000 110 / 1380 60 / 7.50 800~850 550 -0.02 -0.03~+0.03
LNGT72 1050 / 10500 112 / 1400 72 / 9.00 800~850 550 -0.02 -0.03~+0.03
LNGT80 1080 / 10600 120 / 1500 80 / 10.00 800~850 550 -0.02 -0.03~+0.03
LNGT88 1100 / 11000 115 / 1450 88 / 11.00 800-850 550 -0.02 -0.03~+0.03
LNGT96 1150 / 11500 118 / 1480 96 / 12.00 800-850 550 -0.02 -0.03~+0.03
LNGT36J ALNICOBHC 700 / 7000 140 / 1750 36 / 4.50 800~850 550 -0.02 -0.03~+0.03
LNGT48J 800 / 8000 145 / 1820 48 / 6.00 800-850 550 -0.02 -0.03~+0.03
LNGT52J 850 / 8500 140 / 1750 52 / 6.50 800~850 550 -0.02 -0.03~+0.03

Corrosion Resistance and Surface Treatment Options for Alnico Magnets

Surface Treatment of EPI AlNiCo Magnets

Alnico magnets are well-known for their exceptional corrosion resistance, which is a result of their unique composition, primarily consisting of aluminum, nickel, and cobalt, along with other elements such as copper and titanium. This inherent resistance to corrosion ensures that Alnico magnets can maintain their performance and magnetic properties even in challenging environments, without the need for additional protective coatings or plating.

However, there are situations where surface treatments may be necessary or beneficial for Alnico magnets. Some of these application-specific requirements include:

  • Cosmetic Necessity: In cases where the appearance of the magnet is crucial, Alnico magnets can be coated or plated with materials that enhance their visual appeal or match specific design elements. This can be important for consumer products, display items, or any application where aesthetics play a significant role.
  • Bonding: If an application requires the Alnico magnet to be bonded to other components, a surface treatment may be applied to improve adhesion. This can help ensure a secure connection between the magnet and other parts, enhancing the overall performance and durability of the assembled product.
  • Internal Use: For applications where the magnet will be completely enclosed within another component or assembly, a surface treatment may be applied to protect the magnet from potential contact with harsh chemicals, extreme temperatures, or other factors that could impact its performance.
  • Increased Surface Hardness: While Alnico magnets are inherently corrosion-resistant, certain applications may require additional surface hardness to protect the magnet from wear and tear or abrasion. In such cases, a suitable coating or plating can be applied to enhance the magnet’s durability and longevity.

Temperature Effects

Alnico magnets boast excellent temperature stability, maintaining their magnetic properties in temperatures ranging from cryogenic levels to as high as 930°F (500°C). They offer excellent stability with respect to temperature changes and experience minimal strength reduction when heated. At temperatures exceeding 1000°F (538°C), metallurgical changes may cause magnetic strength to reduce rapidly.

Temperature Effects of EPI AlNiCo Magnets

Design Considerations for Alnico Magnets

When working with Alnico magnets, it’s important to take their mechanical properties into account to ensure optimal performance and cost-effectiveness. These magnets are coarse-grained, hard, and brittle, which makes them unsuitable for conventional drilling methods. However, innovative processes, have made it possible to drill Alnico magnets when necessary.

Given their mechanical characteristics, Alnico magnets are not typically used as structural components in product designs. Here are some design recommendations to consider when incorporating Alnico magnets into your application:

  • Opt for simple shapes whenever possible, as they are easier to manufacture and handle.
  • Choose slots over holes, as they are better suited for Alnico’s brittle nature.
  • Avoid cross-sections smaller than 0.125″ (3.18 mm) to minimize the risk of breakage.
  • When a finished surface is required, grinding can be used; however, the “as cast” or “as sintered” surface often provides satisfactory results at a significantly lower cost.
  • For mounting or protection purposes, special assemblies like rotors and magnetron magnets can be equipped with an aluminum jacket.
  • Low carbon steel pole pieces can be attached to magnet pole faces using adhesive bonding or with studs or bolts, providing additional support and functionality.
  • If desired, plastisol or paint can be applied to enhance the magnet’s appearance, making it suitable for applications where aesthetics are important.

 

By considering these design guidelines when working with Alnico magnets, you can ensure a successful integration of the magnet into your application while maximizing performance, reliability, and cost-effectiveness.

Applications of Alnico Magnets

Alnico magnets are used in a broad array of industries and applications, including:

  • Aerospace and Defense: Alnico magnets are used in navigation systems, radar equipment, and other defense technologies.
  • Automotive: Alnico magnets are an essential component in ignition systems, speedometers, and various sensors.
  • Music and Audio: These magnets are commonly found in guitar pickups, microphones, and loudspeakers, providing rich and dynamic sound quality.
  • Medical: Alnico magnets are used in dental equipment, hearing aids, and various diagnostic devices.
  • Industrial: Alnico magnets are ideal for lifting and separating applications, as well as magnetic clamping and holding systems.
Get A Quote

Neodymium Magnets

Other Magnets

Assemblies

Company

Tell us what you need

We will contact you within 1 working day. You can also contact us by sending emails directly to sales@epimagnets.com.