Audited Supplier
(Other shapes and types are all available,Please Contact us for more information~)
Hello,Welcome to Qingdao Seen Magnetic Technology Co.,LTD.
Aims to be one of the best Neodymium Magnet suppliers in China.
We offer high-quality products with competitive price and professional service.
You are welcomed to contact us at any time if you have any question^^
Our Advantages
-Strong & safe supply of rare earth raw materials
-High automation on production
-State of art R&D lab
-RoHS, REACH & SGS Certified
Product Details
All sizes could be customised,Please contact us if you have any inquiry.
About Ferrite Magnet
Ferrite magnets,also known as ceramic magnets are a type of permanent magnet and are made of the chemical compound ferrite, which consists of ceramic materials and iron oxide(Fe2O3),the chemical composition is SrO-6(Fe2O3).Ferrite compounds are extremely low cost, being made of mostly iron oxide, and have excellent corrosion resistance.
Ferrites can be divided into two types based on their resistance to be demagnetized (magnetic coercivity).
Hard ferrites have high coercivity, so they are difficult to demagnetize. They are used to make permanent magnets for applications such as refrigerator magnets, loudspeakers,and small electric motors.
Soft ferrites have low coercivity, so they easily change their magnetization and act as conductors of magnetic fields. They are used in the electronic industry to make efficient magnetic cores called ferrite cores for high-frequency inductors, transformers and antennas,and in various microwave components.
Ferrite cores are used in electronic inductors, transformers, and electromagnets where the high electrical resistance of the ferrite leads to very low eddy current losses.
Most common audio magnets, including those used in loudspeakers and electromagnetic instrument pickups, are ferrite magnets.
Ferrite magnets have largely displaced the more expensive Alnico magnets in many applications. In particular, for hard hexaferrites , the most common uses are still as permanent magnets in refrigerator seal gaskets, microphones small motors for cordless appliances and in automobile applications.
We provide Ferrite Magnets in various shapes such as round, block,ring, arc, special shape in various sizes according to customers' requirements.
We can also custom manufacture ceramic magnets to fit your exact specifications, just contact us today, and we'll work with you to determine the most economical solution for your project.
Magnetic and physical characteristics
(All Grades are available)
| Grade | Remanence | Coercive Force | Intrisic Coercive Force | Max Energy Product | Working Temp | ||||
| Br | Hcb | Hci | (BH)max | L/D=0.7 | |||||
| KGS | T | KOe | KA/m | KOe | KA/m | MGOe | KJ/m | ºC | |
| N35 | 11.7-12.2 | 1.17-1.22 | ≥10.9 | ≥868 | ≥12 | ≥955 | 33-36 | 263-287 | ≤80 |
| N38 | 12.2-12.5 | 1.22-1.25 | ≥11.3 | ≥899 | ≥12 | ≥955 | 36-39 | 287-310 | ≤80 |
| N40 | 12.5-12.8 | 1.25-1.28 | ≥11.4 | ≥907 | ≥12 | ≥955 | 38-41 | 302-326 | ≤80 |
| N42 | 12.8-13.2 | 1.28-1.32 | ≥11.5 | ≥915 | ≥12 | ≥955 | 40-43 | 318-342 | ≤80 |
| N45 | 13.2-13.8 | 1.32-1.38 | ≥11.6 | ≥923 | ≥12 | ≥955 | 43-46 | 342-366 | ≤80 |
| N48 | 13.8-14.2 | 1.38-1.42 | ≥11.6 | ≥923 | ≥12 | ≥955 | 46-49 | 366-390 | ≤80 |
| N50 | 14.0-14.5 | 1.40-1.45 | ≥10 | ≥796 | ≥12 | ≥955 | 48-51 | 382-406 | ≤80 |
| N52 | 14.3-14.8 | 1.43-1.48 | ≥10 | ≥796 | ≥12 | ≥955 | 50-53 | 398-422 | ≤80 |
| 35M | 11.7-12.2 | 1.17-1.22 | ≥10.9 | ≥868 | ≥14 | ≥1114 | 33-36 | 263-287 | ≤100 |
| 38M | 12.2-12.5 | 1.22-1.25 | ≥11.3 | ≥899 | ≥14 | ≥1114 | 36-39 | 287-310 | ≤100 |
| 40M | 12.5-12.8 | 1.25-1.28 | ≥11.6 | ≥923 | ≥14 | ≥1114 | 38-41 | 302-326 | ≤100 |
| 42M | 12.8-13.2 | 1.28-1.32 | ≥12.0 | ≥955 | ≥14 | ≥1114 | 40-43 | 318-342 | ≤100 |
| 45M | 13.2-13.8 | 1.32-1.38 | ≥12.5 | ≥995 | ≥14 | ≥1114 | 43-46 | 342-366 | ≤100 |
| 48M | 13.8-14.3 | 1.38-1.43 | ≥12.9 | ≥1027 | ≥14 | ≥1114 | 46-49 | 366-390 | ≤100 |
| 50M | 14.0-14.5 | 1.40-1.45 | ≥13 | ≥1033 | ≥13.5 | ≥1075 | 48-51 | 382-406 | ≤100 |
| 52M | 14.2-14.7 | 1.42-1.47 | ≥13 | ≥1033 | ≥13 | ≥1035 | 49-53 | 390-422 | ≤100 |
| 35H | 11.7-12.2 | 1.17-1.22 | ≥10.9 | ≥868 | ≥17 | ≥1353 | 33-36 | 263-287 | ≤120 |
| 38H | 12.2-12.5 | 1.22-1.25 | ≥11.3 | ≥899 | ≥17 | ≥1353 | 36-39 | 287-310 | ≤120 |
| 40H | 12.5-12.8 | 1.25-1.28 | ≥11.6 | ≥923 | ≥17 | ≥1353 | 38-41 | 302-326 | ≤120 |
| 42H | 12.8-13.2 | 1.28-1.32 | ≥12.0 | ≥955 | ≥17 | ≥1353 | 40-43 | 318-342 | ≤120 |
| 45H | 13.2-13.7 | 1.32-1.37 | ≥12.1 | ≥963 | ≥17 | ≥1353 | 43-46 | 342-366 | ≤120 |
| 48H | 13.7-14.3 | 1.37-1.43 | ≥12.2 | ≥971 | ≥17 | ≥1353 | 46-49 | 366-390 | ≤120 |
| 50H | 13.9-14.5 | 1.39-1.45 | ≥13 | ≥1035 | ≥17 | ≥1353 | 47-51 | 374-406 | ≤120 |
| 33SH | 11.3-11.8 | 1.13-1.18 | ≥10.6 | ≥844 | ≥20 | ≥1592 | 31-34 | 247-271 | ≤150 |
| 35SH | 11.7-12.2 | 1.17-1.22 | ≥11.0 | ≥876 | ≥20 | ≥1592 | 33-36 | 263-287 | ≤150 |
| 38SH | 12.2-12.5 | 1.22-1.25 | ≥11.4 | ≥907 | ≥20 | ≥1592 | 36-39 | 287-310 | ≤150 |
| 40SH | 12.5-12.8 | 1.25-1.28 | ≥11.8 | ≥939 | ≥20 | ≥1592 | 38-41 | 302-326 | ≤150 |
| 42SH | 12.8-13.2 | 1.28-1.32 | ≥12.4 | ≥971 | ≥20 | ≥1592 | 40-43 | 318-342 | ≤150 |
| 45SH | 13.2-13.7 | 1.32-1.37 | ≥12.3 | ≥995 | ≥20 | ≥1592 | 43-46 | 342-366 | ≤150 |
| 48SH | 13.7-14.2 | 1.37-1.42 | ≥12.5 | ≥995 | ≥20 | ≥1592 | 45-49 | 358-390 | ≤150 |
| 28UH | 10.2-10.8 | 1.02-1.08 | ≥9.6 | ≥764 | ≥25 | ≥1990 | 26-29 | 207-231 | ≤180 |
| 30UH | 10.8-11.4 | 1.08-1.14 | ≥10.2 | ≥812 | ≥25 | ≥1990 | 28-32 | 223-254 | ≤180 |
| 33UH | 11.3-11.8 | 1.13-1.18 | ≥10.7 | ≥852 | ≥25 | ≥1990 | 31-34 | 247-270 | ≤180 |
| 35UH | 11.7-12.2 | 1.17-1.22 | ≥10.8 | ≥860 | ≥25 | ≥1990 | 33-36 | 263-287 | ≤180 |
| 38UH | 12.2-12.5 | 1.22-1.25 | ≥11 | ≥876 | ≥25 | ≥1990 | 36-39 | 287-310 | ≤180 |
| 40UH | 12.5-12.8 | 1.25-1.28 | ≥11.5 | ≥915 | ≥25 | ≥1990 | 38-41 | 302-326 | ≤180 |
| 42UH | 12.8-13.2 | 1.28-1.32 | ≥12.2 | ≥971 | ≥24 | ≥1911 | 39-43 | 310-342 | ≤180 |
| 28EH | 10.4-10.9 | 1.04-1.09 | ≥9.8 | ≥780 | ≥30 | ≥2388 | 26-29 | 207-231 | ≤200 |
| 30EH | 10.8-11.4 | 1.08-1.14 | ≥10.2 | ≥812 | ≥30 | ≥2388 | 28-32 | 223-255 | ≤200 |
| 33EH | 11.3-11.8 | 1.13-1.18 | ≥10.3 | ≥820 | ≥30 | ≥2388 | 31-34 | 247-270 | ≤200 |
| 35EH | 11.7-12.2 | 1.17-1.22 | ≥10.5 | ≥836 | ≥30 | ≥2388 | 33-36 | 263-287 | ≤200 |
| 38EH | 12.2-12.5 | 1.22-1.25 | ≥11.5 | ≥915 | ≥30 | ≥2388 | 35-39 | 279-310 | ≤200 |
Our Products
Package detail
Main production machines
Test equipments
Our customers
Production process
About us
Seen Magnetic Technology Co.,Ltd. was established in 2010. We are a professional magnet manufacturer, magnet supplier and exporter of neodymium magnets,ferrite magnets,rubber magnets, magnetic products such as magnetic lifter and pot magnet and magnetic separator etc.
Seen Magnetic Technology Co.,Ltd. has over 10 years' experience in manufacturing magnets with various shapes and various coating. We have signed long-term strategic cooperation agreements with China's leading raw material enterprises (Bao Steel and The North real-earth )to ensure the quality of our raw materials.
Our products have been exporting to South Korea,Japan , Europe and more than 10 other countries . We are one of the suppliers of relevant products of international well-known companies such as Samsung, LG, Siemens and Hyundai Motor.
As an expert of magnetic materials, We have professional analysis software and experienced engineers which can help customers choose better magnetic materials and provide our customers with high-quality products and service.
FAQ
1. Can I get samples from Seen magnet?
Of course, we are glad to provide samples for your reference. Because samples are the first step to build trust.
2.How can I order magnet from Seen magnet?
Just let us know the size, grade, quantity, surface coating and size tolerance you want.
Then we will provide our best price for your reference.
For example you can send us enquiry like" D25*5 N35 50000pcs Ni-cu-ni +/-0.05″
For your reference our general size tolerance is +/- 0.05, It can be adjusted according to your requirements.
3.What are the surface coatings for neodymium magnets?
For neodymium magnets, they are often need to be coated with Zn, Ni, NiCuNi,Black Epoxy or White Epoxy and other coatings to protect their surfaces from corrosion and oxidization. But for AlNiCo, SmCo or Ferrite magnets, they commonly do no need to be coated due to their own remarkable resistance against corrosion and oxidization.
4.Can I get dimension inspection report and BH curve of the magnets?
We can provide inspection report and demagnetization curve (BH curve) to our customers after production.
5.How to measure the strength of the magnets?
Normally Using a Gauss meter is a easy way to measure the magnetic field density at the surface of the magnet.
This is referred to as the surface field and is measured in Gauss (or Tesla).
Seen Magnet can also provide Gauss meters if you need.
6.What's the shipping method for magnets?
We have different trade terms and shipping method as per different gross weight of the magnets and customer's requirements. For light weight (0-50kgs), we often ship by express. For a relatively heavy weight (50-100kgs), air shipment is preferred.
For a heavy weight (above 100kgs), sea shipment is suitable due to its low cost.
But if you have particular requirements,we will operate it according to your needs.
7.Which payment term do you accept?
For small amount,(for example Sample fee) We accept Paypal and Western Union.
For larger amount transfer(T/T) is the best way.
8.What's your delivery port in China?
Generally, our delivery port of air cargo is Hong Kong or Beijing or others, the delivery port of sea shipment is Weihai or Ningbo port. But these all can be adjusted if you have particular requirement on the delivery port.
9.How do you pack the magnets to ensure shipments safely?
We use carton and steel partition to pack the goods and ensure that every box is firm, secure and non-magnetic in accordance with national and international transportation regulations.
If you have other specific packing requirements, please let us know in advance.
