Supermagnets - Strong Magnets, Rare Earth Magnets and Magnet Material

Magnosphere stocks alnico magnets, bonded magnets, ceramic (ferrite) magnets, flexible rubber magnetsneodymium iron boron (NdFeb) magnets and samarium cobalt magnets along with magnetic material assemblies for fabrication and distribution. Many standard magnetic alloy materials, grades, and geometries (shapes) are available for immediate use. Magnosphere will also fabricate from inventoried permanent magnet materials to your specific requirements.

Diversity exists between the varieties of magnetic alloy materials and grades. Each permanent magnetic material has unique advantages and disadvantages. We suggest that you contact our customer support team so your application can be reviewed. We will then be able to select appropriate magnetic material for your application.
A brief description of commercially available magnetic materials is listed below. A more rigorous explanation and technical characteristics of the various magnetic alloy materials are available on their individual pages.

Magnetic Alloys

Below is a list of the magnetic materials we have available for assemblies:

Alnico Magnets

Alnico magnet alloy is largely comprised of Aluminum, Iron, Cobalt and Nickel. Alnico is a moderately expensive magnet material because of the Cobalt and Nickel content. Alnico magnet alloy has high maximum operating temperature and very good corrosion resistance. Some grades of Alnico alloy can operate upwards of 5500C. Magnets made with this alloy are available in a variety of grades and dimensions and are usually cast and finish ground to size. Alnico magnet material is an older technology and it has a rather low Energy Product (BHmax). Alnico magnet alloy is now mainly used in military, aerospace, older proprietary designs and in applications where the magnet will be exposed to elevated temperatures.


Rare Earth Magnets

Samarium Cobalt Magnets (SmCo) and Neodymium Iron Boron Magnets (NdFeB) are called Rare Earth Magnets because Neodymium and Samarium are found in the rare earth elements on the periodic table. Both Samarium Cobalt and Neodymium magnet alloys are powdered metals which are compacted in the presence of a strong magnetic field and are then sintered.


Neodymium Magnets (Rare Earth)

(NdFeB) Neodymium, a rare earth magnet, is made up of Neodymium Iron and Boron and is moderate in price. With poor corrosion resistance, a neodymium iron boron magnet is usually plated or coated (Examples: Nickel Plated, Epoxy Coated, Parylene Coated). Neodymium magnets are offered in a range of operating temperatures depending on your application (80°C to 200°C). Premium Neodymium magnetic materials capable of operating above 120°C can become quite expensive. This permanent super magnetic material has many intellectual property rights associated with it and there are a limited number of licensed manufacturers in the world. Many infringing manufacturers from the Pacific-rim dump subpar magnetic material into the Western markets. This magnetic material is extremely powerful and it has allowed for the downsizing of many products from HDD (Hard Disc Drives) and motors to novelties and audio devices. Neodymium permanent magnets usually offer the best value when comparing price and performance.


Samarium Cobalt Magnets (Rare Earth)

Samarium Cobalt, another rare earth magnet, is made up largely of  Cobalt and Samarium and is the most expensive magnetic material to manufacture and to fabricate. Most of the cost is due to the high Cobalt content and the brittle nature of the Samarium alloy. This permanent magnetic material offers high resistance to corrosion and can withstand high operating temperatures, up to 350°C. Samarium Cobalt magnetic materials are used extensively in the aerospace market or in areas of industry where performance is the priority concern and cost is secondary. Samarium Cobalt is the second most powerful magnetic material and exhibits excellent resistance to demagnetization.


Ceramic Magnets (Ferrite)

Ceramic magnet material (Ferrite) is Strontium Ferrite. Ceramic magnets are one of the most cost-effective magnetic materials manufactured. The low cost is due to the cheap, abundant, and non-strategic raw materials used in manufacturing this alloy. Permanent Ceramic magnets lend themselves to large production runs. Ceramic magnet material (Ferrite) has a fair to good resistance to corrosion and can operate in moderate heat. The majority of the worlds Ceramic magnetic material comes from China because of the alloys commodity nature and the high tooling costs found in the west. Ceramic (Ferrite) magnets have a low Energy Product and are usually used in an assembly containing mild steel.


Bonded Magnets

Bonded magnet materials can be made from Ceramic, NdFeB, or SmCo powders which are combined with a variety of plastic binders (Matrix). They can be either Injection Molded or Compression Bonded into complex magnet shapes with finished dimensions. Bonded magnet materials have a moderate resistance to corrosion and a low tolerance to heat because of the binder material. Bonded magnets are commonly used in automotive parts because they lend themselves to large production quantities and complex shapes can be produced at a low cost.

Adhesive force

Magnet Grade Chart

Material: Sintered Neodymium Iron Boron:
Magnosphere has the ability to produce magnets in a variety of materials and grades.  The majority of magnets sold and stocked at our facility are Sintered NdFeB (Grade N40), but other varieties are available, and can be produced in most combinations of materials with most sizes.
When selecting an NdFeB grade, keep in mind that the higher the grade (lower in the chart) the more brittle the magnets will be.  Operating Temperatures are grouped by color for ease of reading.  When selecting a working temperature, make sure you will not reach or exceed the Tmax value in the chart, or the magnets will be damaged.

 
Grade Br (KG) Hcb (KOe) Hci (KOe) BHmax (MGOe) Tmax
N35 11.7-12.2 ≥10.9 ≥12.0 33-36 80C / 176F
N38 12.2-12.5 ≥10.9 ≥12.0 36-39 80C / 176F
N40 12.5-12.8 ≥11.4 ≥12.0 38-41 80C / 176F
N42 12.8-13.2 ≥11.5 ≥12.0 40-43 80C / 176F
N45 13.2-13.8 ≥11.6 ≥12.0 43-46 80C / 176F
N48 13.8-14.2 ≥11.6 ≥12.0 46-49 80C / 176F
N50 14.0-14.5 ≥10.0 ≥11.0 48-51 70C / 158F
N52 14.3-14.8 ≥10.0 ≥11.0 50-53 70C / 158F
30M 10.8-11.3 ≥ 10.0 ≥ 14.0 28-31 100C / 212F
33M 11.3-11.7 ≥10.5 ≥14.0 31-33 100C / 212F
35M 11.7-12.2 ≥10.9 ≥14.0 33-36 100C / 212F
38M 12.2-12.5 ≥11.3 ≥14.0 36-39 100C / 212F
40M 12.5-12.8 ≥11.6 ≥14.0 38-41 100C / 212F
42M 12.8-13.2 ≥12.0 ≥14.0 40-43 100C / 212F
45M 13.2-13.8 ≥12.5 ≥14.0 43-46 100C / 212F
48M 13.6-14.3 ≥12.9 ≥14.0 46-49 100C / 212F
50M 14.0-14.5 ≥13.0 ≥14.0 48-51 100C / 212F
30H 10.8-11.3 ≥10.0 ≥17.0 28-31 120C / 248F
33H 11.3-11.7 ≥10.5 ≥17.0 31-34 120C / 248F
35H 11.7-12.2 ≥10.9 ≥17.0 33-36 120C / 248F
38H 12.2-12.5 ≥11.3 ≥17.0 36-39 120C / 248F
40H 12.5-12.8 ≥11.6 ≥17.0 38-41 120C / 248F
42H 12.8-13.2 ≥12.0 ≥17.0 40-43 120C / 248F
45H 13.2-13.8 ≥12.0 ≥17.0 43-46 120C / 248F
48H 13.7-14.3 ≥12.5 ≥17.0 46-49 120C / 248F
30SH 10.8-11.3 ≥10.1 ≥20.0 28-31 150C / 302F
33SH 11.3-11.7 ≥10.6 ≥20.0 31-34 150C / 302F
35SH 11.7-12.2 ≥11.0 ≥20.0 33-36 150C / 302F
38SH 12.2-12.5 ≥11.4 ≥20.0 36-39 150C / 302F
40SH 12.4-12.8 ≥11.8 ≥20.0 38-41 150C / 302F
42SH 12.8-13.2 ≥12.4 ≥20.0 40-43 150C / 302F
45SH 13.2-13.8 ≥12.6 ≥20.0 43-46 150C / 302F
28UH 10.2-10.8 ≥9.6 25.0 26-29 180C / 356F
30UH 10.8-11.3 ≥10.2 ≥25.0 28-31 180C / 356F
33UH 11.3-11.7 ≥10.7 ≥25.0 31-34 180C / 356F
35UH 11.8-12.2 ≥10.8 ≥25.0 33-36 180C / 356F
38UH 12.2-12.5 ≥11.3 ≥25.0 36-39 180C / 356F
40UH 12.4-12.8 ≥11.3 ≥25.0 38-41 180C / 356F
28EH 10.4-10.9 ≥9.8 ≥30.0 26-29 200C / 392F
30EH 10.8-11.3 ≥10.2 ≥30.0 28-31 200C / 392F
33EH 11.3-11.7 ≥10.5 ≥30.0 31-34 200C / 392F
35EH 11.7-12.2 ≥11.0 ≥30.0 33-36 200C / 392F
38EH 12.2-12.5 ≥11.3 ≥30.0 36-39 200C / 392F

 

Material: Bonded Neodymium Iron Boron:

Bonded NdFeB lies between sintered NdFeB and ferrite in properties and is more stable.  Bonded NdFeB is free from further machining and easy for pressing into different shapes like rings, arcs, etc.  It also has a much higher corrosion resistance in comparison with sintered NdFeB.  Bonded magnets offer less flux than sintered magnets but can be net-shape formed into intricately shaped parts and do not suffer significant eddy current losses.

 
Grade Br (KG) Hcb (KOe) Hci (KOe) BHmax (MGOe) Tmax
BDM-4 3.5-4.5 3.0-3.5 8-10 3-4 120C / 248F
BDM-6 5.0-6.0 4.0-4.5 8-10 5-7 120C / 248F
BDM-8 5.5-6.5 4.5-5.0 8-12 5-8.5 150C / 302F
BDM-10 6.5-7.0 5.0-5.5 8-12 9-10 150C / 302F
BDM-12 7.0-8.0 5.5-6.0 9-11 10-12 80C / 176F

 

Material: Samarium Cobalt:

SmCo magnet is a strong permanent magnet made of an alloy of samarium and cobalt.  Comparing with the NdFeB magnet, SmCo magnet is weaker, but more suitable for working in high temperatures.  SmCo magnets are very anti-corrosive and generally does not require electroplating treatment. 

 
Grade Br (KG) Hcb (KOe) Hci (KOe) BHmax (MGOe) Tmax
YX18 8.5-9.0 7.8-8.2 15-19 16-18 250C / 482F
YX20 9.2-9.6 8.2-9.0 15-19 19-21 250C / 482F
YX24 9.6-10 9.2-9.7 15-19 22-24 250C / 482F
YXG24 9.5-10.2 8.0-9.2 18-25 22-24 300C / 572F
YXG26 10.2-10.5 9.4-10.0 18-25 24-26 300C / 572F
YXG28 10.5-10.8 9.5-10.0 18-25 26-28 300C / 572F
YXG28B 10.2-11.0 5.2-6.5 5.5-6.5 26-28 300C / 572F
YXG28 10.8-11.0 9.8-10.5 18-25 28-30 300C / 572F
YXG30B 10.8-11.0 5.2-5.6 5.5-6.5 28-30 300C / 572F

 

Material: Aluminum Nickel Cobalt:

AlNiCo magnets are very stable and have good corrosion resistance and a typical hardness of 50 Rockwell C. AlNiCo represents the most versatile magnet material available.  The range of properties can be accurately designed for specific applications by changes to element analysis and heat treatment.

 
Grade Br (KG) Hcb (KOe) Hci (KOe) BHmax (MGOe) Tmax
LN9 6.8 0.38   1.13 450C / 842F
LN10 6.00 0.5   1.20 450C / 842F
LNG12 7.20 0.5   1.55 450C / 842F
LNG13 7.00 0.6   1.60 450C / 842F
LNG34 12.00 0.6   4.30 525C / 977F
LNG37 12.00 0.6   4.65 525C / 977F
LNG40 12.5 0.6   5.00 525C / 977F
LNG44 12.5 0.65   5.50 525C / 977F
LNG52 13.0 0.7   6.50 525C / 977F
LNGT28 10.0 0.72   3.50 550C / 1022F
LNGT36J 7.00 1.75   4.50 550C / 1022F
LNGT32 8.0 1.25   4.0 550C / 1022F
LNGT40 8.0 1.38   5.0 550C / 1022F
LNGT60 9.00 1.38   7.5 550C / 1022F
LNGT72 1.05 1.4   9.0 550C / 1022F

 

Material: Ferrite (Ceramic):

Ceramic, also known as Ferrite magnets are made of a composite of iron oxide and barium/strontium carbonate by ceramic processing technology. Ferrites are, like most other ceramics, hard and brittle. In terms of the magnetic properties, ferrites are often classified as "soft" and "hard" which refers to their low or high coercivity of their magnetism, respectively.

 
Grade Br (KG) Hcb (KOe) Hci (KOe) BHmax (MGOe) Tmax
C1 2.3 1.86 3.5 1.05 460C / 860F
C5 3.8 2.4 2.5 3.4 460C / 860F
C7 3.4 3.23 4.00 2.75 460C / 860F
C8 3.85 2.95 3.05 3.5 460C / 860F
C8B 4.2 2.913 2.96 4.12 460C / 860F
C9 3.8 3.516 4.01 3.32 460C / 860F
C10 4.0 3.617 3.51 3.82 460C / 860F
C11 4.3 2.512 2.56 4.32 460C / 860F

 

Material: Flexible (Rubber):

Flexible Rubber magnets are made by mixing Ferrite or Neodymium magnet powders and synthetic or natural rubber binders. They are made by rolling (calendaring) or extrusion methods. Flexible magnets are applied because of their advantages of versatility, low cost, and ease of use. These magnets are usually manufactured in strip or sheet form that is widely used in micro-motors, gaskets, novelties, signs, and displays.

 
Grade Br (KG) Hcb (KOe) Hci (KOe) BHmax (MGOe) Tmax
FRM-5 1.55-1.75 1.25-1.45 1.55-1.75 0.60-0.70 80C / 176F
FRM-6 1.60-1.80 1.30-1.50 1.60-1.80 0.65-0.75 80C / 176F
FRM-8 2.15-2.25 1.60-1.80 1.90-2.10 0.95-1.05 80C / 176F
FRM-11 2.40-2.50 1.65-1.85 1.75-1.95 1.35-1.45 80C / 176F
FRM-12 2.45-2.50 2.00-2.20 2.70-2.90 1.45-1.55 80C / 176F

Merken

Merken

Who supplies high quality Supermagnets, Magnets and Magnet Material?

Magnosphere.uk.co offers best priced Neodymium magnets globally to all industries, including Automotive, Aerospace, Military, Advertising, Design House, Electronic and Academic/R&D. Please inquire for custom Neodymium magnets or magnetic assembly.

Buy Magnets and Magnet Material at Magnosphere.co.uk and get a better deal!

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