SINTERED NdFeB Magnets
Rare Earth NdFeB Magnets:The Ultimate Solution for High-Performance Applications
Are you tired of struggling with magnets that can’t deliver the strength and reliability you need for your high-performance applications? Look no further than NdFeB magnets.
Sintered NdFeB (Neodymium Iron Boron) magnets are the most powerful permanent magnets available on the market today, delivering exceptional magnetic performance across a range of industrial applications. Thanks to their high magnetic energy product, coercive force, and maximum energy density, sintered NdFeB magnets are a popular choice for applications where high performance and reliability are essential.
Advantages of Sintered NdFeB Magnets
Sintered NdFeB magnets are known for their exceptional magnetic performance and can deliver the strongest magnetic field among all magnet materials. They have a high resistance to demagnetization, ensuring that they maintain their magnetic properties over time. They also have a high Curie temperature, which means that they can withstand high temperatures without losing their magnetic strength.
NdFeB magnets are made from a unique combination of neodymium, iron, and boron, resulting in a magnet that delivers unmatched magnetic strength and stability. With their superior performance, NdFeB magnets are the top choice for a range of applications, from automotive and aerospace engineering to wind turbines and medical devices.
But the benefits of NdFeB magnets don’t stop there. Thanks to their compact size and superior strength, NdFeB magnets can deliver the same performance as larger magnets while taking up less space. This makes them the ideal choice for applications where size and weight are a concern, such as in portable devices or miniature motors.
And with our NdFeB magnets, you can rest assured that you’re getting the best possible quality. Our magnets are manufactured to the highest standards, ensuring that they deliver the best possible performance and reliability.
So why wait? Don’t let subpar magnets hold back your industrial applications any longer. Choose NdFeB magnets and unlock the power of a magnet that can deliver the reliability and precision you need to take your business to the next level.
Order your NdFeB magnets today and experience the difference that superior strength and stability can make for your business.
NdFeB Magnets Chemical Composition
Sintered NdFeB magnets are made up of intermetallic compounds, with the main composition being NdFeB. The raw materials used in the manufacturing process include rare earth elements (RE), iron (Fe), and boron (B). The most common rare earth element used in the composition is neodymium (Nd), however, thulium (Tm) can be used instead of Nd to achieve different performance characteristics. Other metals, such as cobalt (Co) and aluminum (Al), can also be substituted for Fe.
Although boron makes up a smaller content of the overall composition, it plays a critical role in the material’s properties. The amount of boron affects the tetragonal crystal intermetallics, which are responsible for the material’s high magnetization, uniaxial anisotropy, and curie temperature. By carefully controlling the amount of boron in the composition, manufacturers can tailor the material’s properties to meet specific application requirements.
In summary, sintered NdFeB magnets are made up of a complex intermetallic compound with carefully controlled amounts of various elements to achieve specific properties. The use of different rare earth elements and other metals can alter the material’s performance, while the amount of boron in the composition is critical to the material’s overall magnetic properties.
NdFeB Magnets Making Process
How are Sintered NdFeB Magnets Made?
Sintered NdFeB magnets are made using a powder metallurgy process. Firstly, the raw materials – neodymium, iron, and boron – are melted in a vacuum furnace and then cast into ingots. The ingots are then pulverized into a fine powder and mixed with a binding material before being compacted into the desired shape using a press. The resulting “green” magnet is then subjected to a sintering process, where it is heated to a high temperature to create a solid and dense magnet.
After sintering, the magnet is subjected to a finishing process to ensure its final properties, which includes cutting, grinding, and polishing. Finally, the magnet is coated with a protective layer to prevent corrosion and enhance its durability.
Magnetic Properties of Sintered NdFeB Magnets
| Grade | Remanence | Magnetic Induction | Intrinsic Coercivity | Max Magnetic Energy Product | Maximum Working Temperature≤ | |||||||
| Br ( KG) | Br (T) | Hcb (KOe) | Hcb (KA/m) | Hcj (KOe) | Hcj (KA/m) | (BH)max(MGOe) | (BH)max(KJ/m³) | ℃ | ||||
| Max | Min | Max | Min | |||||||||
| N35 | ≥11.8 | ≥1.18 | ≥10.8 | ≥860 | ≥12 | ≥960 | 37 | 33 | 295 | 263 | N | ≤80 |
| N38 | ≥12.3 | ≥1.23 | ≥10.8 | ≥860 | ≥12 | ≥960 | 39 | 36 | 310 | 287 | ||
| N40 | ≥12.7 | ≥1.27 | ≥11.0 | ≥876 | ≥12 | ≥960 | 41 | 38 | 327 | 302 | ||
| N42 | ≥13.0 | ≥1.30 | ≥11.0 | ≥876 | ≥12 | ≥960 | 43 | 40 | 343 | 320 | ||
| N45 | ≥13.3 | ≥1.33 | ≥11.0 | ≥876 | ≥12 | ≥960 | 46 | 42 | 366 | 335 | ||
| N48 | ≥13.7 | ≥1.37 | ≥10.5 | ≥836 | ≥12 | ≥960 | 49 | 45 | 390 | 358 | ||
| N50 | ≥14.0 | ≥1.40 | ≥10.5 | ≥836 | ≥12 | ≥960 | 51 | 47 | 406 | 374 | ||
| N52 | ≥14.2 | ≥1.42 | ≥10.5 | ≥836 | ≥12 | ≥960 | 53 | 49 | 422 | 390 | ||
| N54 | ≥14.4 | ≥1.44 | ≥10.5 | ≥836 | ≥11 | ≥876 | 55 | 51 | 438 | 406 | ||
| N35M | ≥11.8 | ≥1.18 | ≥10.8 | ≥860 | ≥14 | ≥1114 | 37 | 33 | 295 | 263 | M | ≤100 |
| N38M | ≥12.3 | ≥1.23 | ≥11.0 | ≥876 | ≥14 | ≥1114 | 39 | 36 | 310 | 287 | ||
| N40M | ≥12.7 | ≥1.27 | ≥11.5 | ≥915 | ≥14 | ≥1114 | 41 | 38 | 327 | 302 | ||
| N42M | ≥13.0 | ≥1.30 | ≥11.8 | ≥939 | ≥14 | ≥1114 | 43 | 40 | 343 | 320 | ||
| N45M | ≥13.3 | ≥1.33 | ≥12.0 | ≥956 | ≥14 | ≥1114 | 46 | 42 | 366 | 335 | ||
| N48M | ≥13.7 | ≥1.37 | ≥12.2 | ≥972 | ≥14 | ≥1114 | 49 | 45 | 390 | 358 | ||
| N50M | ≥14.0 | ≥1.40 | ≥12.5 | ≥995 | ≥14 | ≥1114 | 51 | 47 | 406 | 374 | ||
| N52M | ≥14.2 | ≥1.42 | ≥12.5 | ≥995 | ≥14 | ≥1114 | 53 | 49 | 422 | 390 | ||
| N33H | ≥11.4 | ≥1.14 | ≥10.6 | ≥844 | ≥17 | ≥1350 | 35 | 31 | 279 | 247 | H | ≤120 |
| N35H | ≥11.8 | ≥1.18 | ≥10.8 | ≥860 | ≥17 | ≥1350 | 37 | 33 | 295 | 263 | ||
| N38H | ≥12.3 | ≥1.23 | ≥11.0 | ≥876 | ≥17 | ≥1350 | 39 | 36 | 310 | 287 | ||
| N40H | ≥12.7 | ≥1.27 | ≥11.5 | ≥916 | ≥17 | ≥1350 | 41 | 38 | 327 | 302 | ||
| N42H | ≥13.0 | ≥1.30 | ≥11.8 | ≥940 | ≥17 | ≥1350 | 43 | 40 | 343 | 320 | ||
| N45H | ≥13.3 | ≥1.33 | ≥12.0 | ≥955 | ≥17 | ≥1350 | 46 | 42 | 366 | 335 | ||
| N48H | ≥13.6 | ≥1.36 | ≥12.2 | ≥971 | ≥17 | ≥1350 | 49 | 45 | 390 | 358 | ||
| N50H | ≥14 | ≥1.4 | ≥12.5 | ≥995 | ≥17 | ≥1350 | 51 | 47 | 406 | 374 | ||
| N52H | ≥14.3 | ≥1.43 | ≥12.5 | ≥995 | ≥17 | ≥1350 | 53 | 49 | 422 | 390 | ||
| N33SH | ≥11.4 | ≥1.14 | ≥10.6 | ≥844 | ≥20 | ≥1592 | 35 | 31 | 279 | 247 | SH | ≤150 |
| N35SH | ≥11.8 | ≥1.18 | ≥10.8 | ≥860 | ≥20 | ≥1592 | 37 | 33 | 295 | 263 | ||
| N38SH | ≥12.3 | ≥1.23 | ≥11.0 | ≥876 | ≥20 | ≥1592 | 39 | 36 | 310 | 287 | ||
| N40SH | ≥12.6 | ≥1.26 | ≥11.5 | ≥916 | ≥20 | ≥1592 | 41 | 38 | 327 | 302 | ||
| N42SH | ≥12.9 | ≥1.29 | ≥11.8 | ≥940 | ≥20 | ≥1592 | 43 | 40 | 343 | 320 | ||
| N45SH | ≥13.2 | ≥1.32 | ≥12.0 | ≥955 | ≥20 | ≥1592 | 46 | 42 | 366 | 335 | ||
| N48SH | ≥13.6 | ≥1.36 | ≥12.2 | ≥971 | ≥20 | ≥1592 | 49 | 45 | 390 | 358 | ||
| N50SH | ≥14 | ≥1.4 | ≥12.5 | ≥995 | ≥20 | ≥1592 | 51 | 47 | 406 | 374 | ||
| N33UH | ≥11.4 | ≥1.14 | ≥10.6 | ≥844 | ≥25 | ≥1990 | 35 | 31 | 279 | 247 | UH | ≤180 |
| N35UH | ≥11.8 | ≥1.18 | ≥10.8 | ≥860 | ≥25 | ≥1990 | 37 | 33 | 295 | 263 | ||
| N38UH | ≥12.3 | ≥1.23 | ≥11.0 | ≥876 | ≥25 | ≥1990 | 39 | 36 | 310 | 287 | ||
| N40UH | ≥12.6 | ≥1.26 | ≥11.5 | ≥916 | ≥25 | ≥1990 | 41 | 38 | 327 | 302 | ||
| N42UH | ≥12.9 | ≥1.29 | ≥11.8 | ≥940 | ≥25 | ≥1990 | 43 | 40 | 343 | 320 | ||
| N45UH | ≥13.2 | ≥1.32 | ≥12.0 | ≥955 | ≥25 | ≥1990 | 46 | 42 | 366 | 335 | ||
| N48UH | ≥13.6 | ≥1.36 | ≥12.2 | ≥971 | ≥25 | ≥1990 | 49 | 45 | 390 | 358 | ||
| N28EH | ≥10.4 | ≥1.04 | ≥9.50 | ≥756 | ≥30 | ≥2388 | 30 | 26 | 239 | 207 | EH | ≤200 |
| N30EH | ≥10.8 | ≥1.08 | ≥9.50 | ≥756 | ≥30 | ≥2388 | 32 | 28 | 255 | 223 | ||
| N33EH | ≥11.4 | ≥1.14 | ≥10.6 | ≥844 | ≥30 | ≥2388 | 35 | 31 | 279 | 247 | ||
| N35EH | ≥11.8 | ≥1.18 | ≥10.8 | ≥860 | ≥30 | ≥2388 | 37 | 33 | 295 | 263 | ||
| N38EH | ≥12.3 | ≥1.23 | ≥11.0 | ≥876 | ≥30 | ≥2388 | 39 | 36 | 310 | 287 | ||
| N40EH | ≥12.6 | ≥1.26 | ≥11.5 | ≥916 | ≥30 | ≥2388 | 41 | 38 | 327 | 302 | ||
| N42EH | ≥12.9 | ≥1.29 | ≥11.8 | ≥940 | ≥30 | ≥2388 | 43 | 41 | 343 | 320 | ||
| N45EH | ≥13.2 | ≥1.32 | ≥12.0 | ≥955 | ≥30 | ≥2388 | 46 | 42 | 366 | 335 | ||
| N30TH | ≥10.8 | ≥1.08 | ≥9.50 | ≥756 | ≥35 | ≥2786 | 32 | 28 | 255 | 223 | TH | ≤220 |
| N33TH | ≥11.4 | ≥1.14 | ≥10.6 | ≥844 | ≥35 | ≥2786 | 35 | 31 | 279 | 247 | ||
| N35TH | ≥11.8 | ≥1.18 | ≥11.0 | ≥876 | ≥35 | ≥2786 | 37 | 33 | 295 | 263 | ||
| N38TH | ≥12.2 | ≥1.22 | ≥11.0 | ≥876 | ≥33 | ≥2627 | 39 | 36 | 310 | 287 | ||
1. The magnetic parameters mentioned above are provided at room temperature.
2. The grades mentioned above are our base grades, with additional T-series (e.g., 35SHT, etc.) and L-T series (e.g., L-38SHT, etc.) derived from these base grades. The properties of the derived grades correspond to those of the base grades.
3. The maximum working temperature for our permanent magnets is determined by subjecting a sampling specification (Permanent Magnet: φ10×7) to long-term heating (typically 1000 hours) to regular temperature, followed by cooling to room temperature. The irreversible loss of magnetic flux is less than 5%. This maximum temperature is indicated by “Tw” and measured in K or ℃, and is specific to the permanent magnet material.
The maximum working temperature of our magnets can vary depending on the grade, operating conditions, coating, and environmental factors.
Physical Properties of Sintered NdFeB Magnets
| Temp.Coeff.of Br | -0.11%/ °C | Temp.Coeff.of Hc | -0.60%/ °C |
| Density | 7.3-7.5g/cm 3 | Electrical Resistivity | 114 .cm |
| Vickers Hardness | 600Hv | Flexural Resistivity | 25kg/mm |
| Tensile Strength | 8.0Kg/mm2 | Coeff. Of Thermal Expansion | 4X10 -6 / °C |
| Specific Heat | 0.12Kcal/Kg | Thermal Conductivity | 7.7kcal/[m.h. °C |
| Young ¡s Modulus | 1.6X10[11]N/m2 | Rigidity | 0.64N/m2 |
| Poisson¡¯s Ratio | 0.24 | Compressibility | 9.8×10-12m2/N |
| Curie Temperature | 310-340 °C |
BH Curve and Irreversible Losses
Size of NEODYMIUM MAGNETS
| Size | Outer Diameter/Length | Inner diameter/Width | Thickness | |
 | Maximum | 150mm | 50.00mm | |
| Minimum | 1mm | 0.50mm | ||
 | Maximum | 100mm | 100mm | 50.00mm |
| Minimum | 0.5mm | 0.50mm | 0.50mm | |
 | Maximum | 150mm | 140mm | 50.00mm |
| Minimum | 1.00mm | 0.60mm | 0.50mm | |
 | Segment, Arc, and other irregular shapes can be made according to the customer’s samples or drawings. | |||
At our manufacturing facility, we understand that sometimes standard magnets may not fit the bill. That’s why we offer custom-shaped magnets to meet your unique needs. Whether it’s a segment, arc, or other irregular shapes, we can produce magnets according to your samples or drawings.
Our experienced engineers and skilled technicians will work with you to ensure that your custom-shaped magnets meet the highest quality standards. We utilize advanced manufacturing technology and equipment to produce magnets with precise shapes, dimensions, and magnetic properties.
No matter what your application requires, we can deliver custom-shaped magnets that perform to your exact specifications. From prototypes to high-volume production runs, we have the capacity and expertise to meet your needs.
Get in touch with us today to discuss your custom-shaped magnet needs. We are committed to delivering innovative solutions and exceptional service to our customers.
MAGNETIZATION DIRECTION for Neodymium Magnets
Magnetization direction refers to the direction in which the magnetic field is oriented in a magnet. For neodymium magnets, there are two main types of magnetization directions: axial and diametrical.
Axial magnetization refers to the orientation of the magnetic field along the length of the magnet. This is the most common type of magnetization direction for neodymium magnets. Axially magnetized neodymium magnets are ideal for applications that require a strong, focused magnetic field in a specific direction.
Diametrical magnetization, on the other hand, refers to the orientation of the magnetic field along the diameter of the magnet. In this type of magnetization, the magnetic poles are located on opposite sides of the magnet. Diametrically magnetized neodymium magnets are used in applications that require a broader, more diffuse magnetic field.
It is essential to understand the magnetization direction of neodymium magnets when choosing the right magnet for your application. Different magnetization directions have different effects on the magnet’s magnetic field, which can impact its performance and effectiveness.
At our manufacturing facility, we can produce neodymium magnets with both axial and diametrical magnetization directions to meet your specific needs. Contact us today to learn more about our neodymium magnets and magnetization services.
Wide Applications Of NEODYMIUM Magnets
Rare-earth permanent NdFeB magnets possess exceptional magnetic properties and are made from abundant raw materials that are available at reasonable prices. This makes them an ideal choice of a magnet for various industries, including mini-motors, permanent-magnet instruments, electronic devices, automotive components, petrochemical equipment, nuclear magnetic resonance machines, sound systems, magnetic suspension systems, magnetic transmission machines, and magnetotherapy devices, among others.
Due to their high magnetic energy product, rare-earth permanent NdFeB magnets are widely used in mini-motors and permanent-magnet instruments. Their excellent magnetic properties also make them ideal for use in electronic devices and automotive components. In petrochemical industries, they are used in drilling tools, magnetic stirrers, and separators. Meanwhile, in medical fields, they can be found in magnetic resonance imaging (MRI) machines, while in audio systems, they are used in speakers, headphones, and microphones.
Rare-earth permanent NdFeB magnets are also ideal for use in magnetic suspension systems, where their magnetic force is used to suspend and move objects without physical contact. Additionally, they are used in magnetic transmission machines, which utilize magnetic forces to transmit power, thus avoiding mechanical friction and reducing energy loss. In magnetotherapy, these magnets can be used to promote healing and reduce pain in patients.
In conclusion, the exceptional magnetic properties of rare-earth permanent NdFeB magnets, combined with their abundant raw material availability and reasonable prices, make them a popular choice in various industries. The versatility of these magnets, as seen in their use in a wide range of applications, shows their importance in modern technology and the continued need for further research and development to improve their performance and expand their potential uses.
Acoust
Motor Assembly
AVIATION
IT INDUSTRIAL
Wind Energy
TRANSIT
Robort industrial
MEDICINE
HOME APPLIANCE
AUTOMOBILE
TOYS
Oil and Gas
Sintered NdFeB Magnets of Surface Treatment
As a top supplier of magnetic materials, Sinoneo is continuously conducting research and development to ensure that they provide its customers with exceptional quality products. In pursuit of this goal, Sinoneo has recently updated its surface protection technology to provide advanced coatings and plating options, including Zinc, Tin, Nickel, and Epoxy.
Sinoneo’s advanced coatings and plating services are designed to enhance the efficiency, durability, and corrosion resistance of its magnetic materials. The company’s surface protection technology ensures that the coatings and plating are applied with precision and accuracy.
Sinoneo is also highly committed to environmental protection throughout the entire coating and plating process. All coatings used in the production of its magnetic materials are fully compliant with the requirements of ROHS and RECH.
With its industry-leading surface protection technology, Sinoneo is capable of delivering magnetic materials of exceptional quality that are widely used in various sectors such as automotive, medical, telecommunications, and renewable energy.
In conclusion, our advanced surface protection technology is the perfect solution for customers looking to acquire high-quality magnetic materials with superior protection. Contact Sinoneo today to learn more about their innovative magnetic materials and coatings
Coating | Code | Color | Minimum Local | Memrge etching time | Working temperature | |||
Neutralsalt | Humid heat test | Pressure | ||||||
Ni(Barrel plating) | Ni | Sliver | 10 | 24 | 300 | 48 | <200 | |
Ni(rack plating) | Ni | Sliver | 10 | 8 | 300 | 48 | ||
NiCuNi(barrel plating) | NiCuNi | Sliver | 10 | 72 | 500 | 48 | ||
NiCuNi(rack plating) | NiCuNi | Sliver | 10 | 48 | 500 | 48 | ||
Zinc | White zinc | Zn | White Zinc | 4 | 24 | 48 | / | <170 |
Color zinc | CZn/Zn | Color Zinc | 6 | 48 | 48 | / | ||
Chemical plating Ni | Ni | Silver | 12 | 96 | 500 | 48 | <200 | |
Electrophoresis epoxy | Epoxy | Black,grey | 10 | 48-96 | 120 | 0-24 | <130 | |
Parylene | Parylene | Colorless and transparent | 12.7-25.4 microns | 48 | / | / | <130 | |
The main shape of Rare Earth Neodymium Magnets
NEODYMIUM ARC MAGNETS
Neodymium Arc Magnets or Neodymium Tile Magnets is one popular shape of Rare earth magnets and permanent magnets. It is always manufactured via Wire Cutting and grinding etc.
NEODYMIUM BLOCK MAGNETS
Neodymium Block Magnets is one regular shape of Rare earth magnets and permanent magnets. It is always manufactured via Cutting and grinding etc.
NEODYMIUM COUNTERSUNK MAGNETS
Neodymium Countersunk Magnets and Counterbored Magnets. Great for many applications including door/cabinet closures, hanging art on a wall, and more!
NEODYMIUM CYLINDER MAGNETS
Neodymium Cylinder magnets or NdFeB round Magnets is one basic shape of Rare earth magnets and permanent magnets. It is always manufactured via Cutting, Slicing, Centerless grinding, etc.
NEODYMIUM DISC MAGNETS
Neodymium disc magnets or round NdFeB Magnets is one basic shape of Rare earth magnets and permanent magnets. It has the following important factors such as Diameter and Thickness.
NEODYMIUM RING(TUBE) MAGNETS
Ring neodymium magnets or NdFeB Tube Magnets is one basic shape of Permanent Rare earth magnets. It has important factors such as Out Diameter, Inner Diameter, and Thickness.
In order to provide you with a price for our rare earth magnets (sintered NdFeB magnets), we kindly request that you provide us with the following details:
- Magnets Grade: Please specify the grade of magnet you require, ranging from N35 to N50, from N Series to UH Series.
- Magnet Size: Please provide the size requirements as per your drawing.
- Magnetization Direction: Kindly specify the orientation of the north and south poles.
- Magnets Coating: We offer a range of coating options such as Nickel, Zn, Black Epoxy, Ag, Au, etc. Please specify your preferred option.
- Quantities: We offer lower prices for larger order quantities. As an original factory, we can cater to your mass order requirements.
At our company, we are committed to delivering high-quality rare earth magnets with exceptional performance and durability. We have a wide range of sintered NdFeB magnets in various sizes and grades, suitable for a range of industries such as automotive, renewable energy, and medical equipment.
Contact us today with your requirements, and we will provide you with a competitive quote for your rare earth magnet needs. Our team is dedicated to providing superior customer service, and we are confident that we can meet and exceed your expectations.
ARE YOU LOOKING FOR THE NEODYMIUM MAGNETS?
Sinoneo Magnets is a Neodymium Magnets Supplier and Manufacturer in China. Our magnet engineers will help you get exactly what you need – for your retail or industrial applications – in a short time with high quality at a better price.
Find Us: Cicheng Industrial Zone, Ningbo, China (315000)
Suzhou Office: No.38, Yingchunnan Road, Suzhou, China (215168)
Tel: +86-159 0650 8736
Email: sales@sinoneo.com
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