In this article, you will find out everything you need to know about Ferrite Magnets: key facts, applications, magnetic strength and price. A perfect guide to have a look at before buying your ferrite magnets online.
FERRITE MAGNETS: CHEAP AND RESISTANT MAGNETS
Ferrite Magnets have been on the market since the 1950s and are a well-established magnetic material. They are also called raw magnets, hard ferrite magnets, ceramic permanent magnets.
Ferrite is a ceramic material consisting largely of iron oxide (Fe2O3) blended with one or more additional metals like strontium, barium, manganese, nickel or zinc. Ferrite is ferromagnetic, so it can be magnetized (become a permanent magnet). It can attract or stick to other ferromagnetic materials (like iron or steel).
Unlike other ferromagnetic materials, most ferrite magnets are not electrically conductive.
Ferrite Magnets: Key features, Pros and Cons
- Ferrite Magnets are the cheapest magnets you can buy. Usually 2 to 6 times cheaper than standard neodymium magnets;
- They can be used in humid environments or underwater without any issue. They are virtually immune to oxidation and rust. They are not easily damaged by salt water or even chemicals;
- Sturdy and durable. They are hard and resist impacts well;
- Good flexibility of use and suitable for multiple applications. Magnets with hole (rings), magnets with threaded rod or socket, magnets for magnetotherapy, fridge collectible magnets and more;
- They have a high coercivity, a property that makes them difficult to demagnetize;
- They are very resistant to heat and corrosion. A Ferrite Magnet can be used at a temperature of up to 250°C;
- Available in many different shapes and sizes. Discs, blocks and rings. From 8mm small magnets to 10cm very large magnets. They can be as thin as 2mm;
- Their magnetic strength is weaker than neodymium magnets: 8 to 15 times, depending on the grade of the neodymium magnet (N35 to 56);
- Dark grey in color, they look less polished than neodymium magnets;
For a full comparison between Ferrite and Neodymium Magnets check out our dedicated article: Neodymium vs Ferrite magnets: complete guide
FERRITE MAGNETS: USES AND APPLICATIONS
Ferrite magnets are used for a variety of applications in many different industries, from jewelry to military warfare.
Here some of the most common applications:
- Furniture industry;
- Automotive;
- Electronic inductors, transformers, and electromagnets;
- Plastic industry;
- Metal industry;
- Food industry (deferrization and metal separation);
- Breaks and clamps;
- Switches and relays;
- Consumer Electronics: microwave ovens, loudspeakers and more;
- High Temperatures Environments;
- Humid/Outdoors/Underwater Environments;
- Fridge, collectible, souvenir magnets;
- Advertising magnets;
- Motors, generators, alternators;
- Medical devices;
- Magnet therapy;
- Magnetic lifters;
- Magnetic tool bars;
- Hobby modeling.
MAGNETIC STRENGTH OF FERRITE MAGNETS
Ferrite Magnets have a good Magnetic Strength even in the smallest size. Their adhesive force (the property to stick to and attract ferromagnetic metals) is weaker than neodymium magnets (especially higher grades) but they can be very cost-effective.
Magnetic strength reference table
| MAGNET | FERRITE | N35 | N38 | N40 | N42 |
| Disc D.12X3 mm | 0,20 kg | 1,80 kg | 2,26 kg | 2,38 kg | 2,52 kg |
| Disc D.20X2 mm | 0,30 kg | 2,30 kg | 2,54 kg | 2,68 kg | 2,81 kg |
| Disc D.25X3 mm | 0,45 kg | 4,28 kg | 4,84 kg | 5,09 kg | 5,35 kg |
| Disc D.30X10 mm | 2,20 kg | 16,00 kg | 19,38 kg | 20,40 kg | 21,41 kg |
| MAGNET | N45 | N48 | N50 | N52 | N56 |
| Disc D.12X3 mm | 2,68 kg | 2,86 kg | 2,98 kg | 3,10 kg | 3,34 kg |
| Disc D.20X2 mm | 3,01 kg | 3,21 kg | 3,25 kg | 3,48 kg | 3,75 kg |
| Disc D.25X3 mm | 5,73 kg | 6,11 kg | 6,37 kg | 6,63 kg | 7,15 kg |
| Disc D.30X10 mm | 22,95 kg | 24,48 kg | 25,50 kg | 26,52 kg | 28,55 kg |
Magnetic strength reference chart
These tables and charts refer to Magnetic Discs of different sizes: diameter X thickness in mm. N35, N38, N40, N42, N45, N48, N50, N52, N56 stand for Neodymium Magnets of the corresponding grade. In our tests, a dynamometer is used to measure the required force (in kg) to detach the magnet from a 10mm steel plate. We use one magnet at a time, at room temperature, with perfect adherence to a smooth steel surface.
PRICE OF FERRITE MAGNETS
Here is a reference table of the cost of a 10x2mm magnetic disc made with Neodymium or Ferrite:
| Quantity | Ferrite | Neodymium N35 | Neodymium N56 |
| 1 – 59 | 0,15€ | 0,41€ | 1,20€ |
| 60 – 149 | 0,11€ | 0,29€ | 0,85€ |
| 150 – 300 | 0,10€ | 0,21€ | 0,60€ |
| 301 – 600 | 0,08€ | 0,15€ | 0,43€ |
| 601 – 1500 | 0,06€ | 0,12€ | 0,36€ |
Why are Ferrite Magnets so cheap?
The main factor is the cost of the raw materials. Ferrite compounds are extremely low cost, being made mostly of iron oxide. On the other hand, Neodymium is a rare-earth element mined in only a few countries (80-90% of the global production is in China).
The manufacturing process of neodymium magnets is also more complex and energy-intensive.
FERRITE MAGNETS FREQUENTLY ASKED QUESTIONS
How long do Ferrite Magnets last? How can they lose their magnetization?
Under normal circumstances, Permanent Ferrite Magnets may lose 2% of their magnetic strength each year, although some other sources estimate an approximate 10% strength loss in 100 years. On the other hand, if they are exposed to temperatures higher than recommended (usually 250°C), or to electric discharges (galvanic bath), they can immediately lose performance or be permanently damaged. There are other factors that can cause a loss of magnetization such as: strong impacts, corrosion or proximity to other magnets (improper storage).
If you want to learn more about Magnets and loss of magnetization, you can read our dedicated article: Loss of Magnetization and Demagnetization of Permanent Magnets
What temperature can a Ferrite Magnets withstand?
Ferrite Magnets can withstand temperatures up to 250 °C without being damaged or suffer demagnetization. Compared to SmCo and AlNiCo Magnets, they are a good alternative at a more competitive price.
If you want to learn more about Magnets and heat resistance, you can read our dedicated article: Permanent Magnets and Heat Resistance: the best magnets to use
If you are looking for magnets suitable for use in high temperature environments, check out our Heat Resistant Magnets product category.
Where can I buy Ferrite Magnets online?
You can buy Ferrite Magnets Online on www.supermagneticshop.com. We offer low prices, high quality and fast delivery.
Check out our Ferrite Magnets product category. Find millions of ferrite magnets in stock: discs, blocs and rings.
Go to our Themed Magnets product category for unique collectible magnets (fridge and souvenir magnets).
Go to our Ferrite Pot Magnets product category for magnets with passing hole, with eyelet, with threaded rod and more.
Visit our Applications Page for even more options like: magnetic toolbars, magnetototherapy and magnets with custom logo for advertising.
Where can I get Custom-made Ferrite Magnets?
SuperMagneticShop is a magnet manufacturer since 1979. We can provide custom-made magnets and personalized products. Custom dimensions, magnetization options or coatings: for all applications. Check out our Custom-made Products Request Page or Contact Us by email, phone or live chat. Technical support is available in 5 languages: English, Italian, French, Spanish, and German, Monday to Friday, 8:00 a.m. to 5:00 p.m.
I need a large quantity of Ferrite Magnets and I'm looking for a supplier
SuperMagneticShop is a magnet supplier and wholesaler. Companies can get the best deals by ordering large quantities of magnets from us. We are based in Europe to ensure just-in-time deliveries.
For personalized quotes, visit our Request a Quote Page
For business partnerships and more details, visit our B2B Page
Or contact our sales team by email, phone or live chat. Sales support available in 5 languages: English, Italian, French, Spanish, and German, Monday to Friday, 8:00 a.m. to 5:00 p.m.
