Product Details
Certification: ISO9001
Payment & Shipping Terms
Minimum Order Quantity: 100pcs
Price: As negotiation
Packaging Details: cartons,pallets
Delivery Time: 20-25days
Payment Terms: T/T L/C
Supply Ability: 100 tons per month for NdFeB magnet
Magnetic Performance: |
Stable |
Corrosion Resistance: |
High |
Temperature Resistance: |
High |
Grade: |
N35-N52 |
Pull Force: |
High |
Application: |
Widely Used |
Magnetic Performance: |
Stable |
Corrosion Resistance: |
High |
Temperature Resistance: |
High |
Grade: |
N35-N52 |
Pull Force: |
High |
Application: |
Widely Used |
Introduction
Neodymium Iron Boron (NdFeB) or Neodymium magnets are extremely strong for their size. Shapes include rings, blocks, discs and custom.
To prevent unwanted oxidation, neodymium magnets are usually finished with a zinc, nickel or epoxy coating.
Manufacturing - In general, the elements are melted together and milled into a powder that is dry-pressed to shape in the presence of a magnetic field.
The material is then sintered, ground to dimension, magnetized and tested. They are called “rare earth” magnets because the elements of neodymium are classified as such in the lanthanides section of the Periodic Table of the Elements.
Physical Properties of Sintered Neodymium Magnet
| Parameter Name | Parameter Values | Unit |
| Curie Temperature | 310～380 | ℃ |
| Relative Recoil Permeability | 1.02～1.05 | |
| Reversible Temperature Coefficient of Br (20~100℃) | -0.09～-0.13 | %/℃ |
| Reversible Temperature Coefficient of Hcj (20~100℃) | -0.4～-0.7 | %/℃ |
| Density | 7.50～7.70 | g/cm3 |
| Vickers Hardness | 550～700 | |
| Bending Strength | -0.09～-0.13 | MPa |
| Tensile Strength | ≥80 | MPa |
| Compressive Strength | 800 ~1050 | MPa |
| Electric Resistivity | 150 | μΩ·cm |
| Thermal Conductivity | 8～10 | W/(M·℃) |
| Coefficient of Thermal Expansion (Parallel to the orientation) |
5 | 10-6/K |
| Coefficient of Thermal Expansion (vertical to the orientation) |
-1.5 | 10-6/K |
| Young's Modulus | 150～200 | GPa |
| Specific Heat(20℃～320℃) | 3.0～4.6 | J/(g·k) |
| weight loss(low weight loss products) | ≤2 | mg/cm2 |
Magnetic Properties of Sintered Neodymium Magnet
| Grade | Remanence | Coercivity | Intrinsic Coercivity | Max Energy Product | Working Temp | |||||
| (Br) | (HcB) | (HcJ) | (BH)max | Tw | ||||||
| KGs | T | KOe | KA/m | KOe | KA/m | MGOe | KJ/m³ | ℃ | ||
| N Series |
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 | ≥10.0 | ≥796 | ≥11 | ≥876 | 48-51 | 382-406 | ≤60 | |
| N52 | 14.3-14.8 | 1.43-1.48 | ≥10.0 | ≥796 | ≥11 | ≥876 | 50-53 | 398-422 | ≤60 | |
| M Series |
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 | 38-40 | 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 | ≥955 | ≥14 | ≥1114 | 43-46 | 342-366 | ≤100 | |
| 48M | 13.6-14.3 | 1.36-1.43 | ≥12.9 | ≥1027 | ≥14 | ≥1114 | 46-49 | 366-390 | ≤100 | |
| 50M | 14.0-14.5 | 1.40-1.45 | ≥13.0 | ≥1033 | ≥14 | ≥1114 | 48-51 | 382-406 | ≤100 | |
| 52M | 14.3-14.8 | 1.43-1.48 | ≥13.0 | ≥995 | ≥14 | ≥1114 | 50-52 | 398-414 | ≤100 | |
| H Series |
33H | 11.3-11.7 | 1.13-1.17 | ≥10.6 | ≥844 | ≥17 | ≥1353 | 31-34 | 263-287 | ≤120 |
| 35H | 11.7-12.2 | 1.17-1.21 | ≥10.9 | ≥869 | ≥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 | 13.0-13.6 | 1.30-1.36 | ≥12.1 | ≥963 | ≥17 | ≥1353 | 43-46 | 326-358 | ≤120 | |
| 48H | 13.7-14.3 | 1.37-1.43 | ≥12.5 | ≥955 | ≥17 | ≥1274 | 46-49 | 366-390 | ≤120 | |
| SH Series |
30SH | 10.8-11.3 | 1.08-1.13 | ≥10.1 | ≥804 | ≥20 | ≥1592 | 28-31 | 233-247 | ≤150 |
| 33SH | 11.3-11.7 | 1.13-1.17 | ≥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 | ≥987 | ≥20 | ≥1592 | 40-43 | 318-342 | ≤150 | |
| 45SH | 13.2-13.8 | 1.32-1.38 | ≥12.6 | ≥1003 | ≥20 | ≥1592 | 43-46 | 342-366 | ≤150 | |
| 48SH | 13.7-14.3 | 1.37-1.43 | ≥12.6 | ≥1003 | ≥20 | ≥1592 | 46-49 | 366-390 | ≤150 | |
| UH Series |
30UH | 10.8-11.3 | 1.08-1.13 | ≥10.2 | ≥812 | ≥25 | ≥1990 | 28-31 | 223-247 | ≤180 |
| 33UH | 11.3-11.7 | 1.13-1.17 | ≥10.7 | ≥852 | ≥25 | ≥1990 | 31-34 | 247-271 | ≤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 | ≥11.0 | ≥876 | ≥25 | ≥1990 | 36-39 | 287-310 | ≤180 | |
| 40UH | 12.4-12.8 | 1.24-1.28 | ≥11.3 | ≥915 | ≥25 | ≥1990 | 38-41 | 302-326 | ≤180 | |
| 42UH | 12.8-13.2 | 1.28-1.32 | ≥11.3 | ≥971 | ≥25 | ≥1990 | 40-43 | 318-342 | ≤180 | |
| EH Series |
30EH | 10.8-11.3 | 1.08-1.13 | ≥10.2 | ≥812 | ≥30 | ≥2388 | 28-31 | 223-247 | ≤200 |
| 33EH | 11.3-11.7 | 1.13-1.17 | ≥10.5 | ≥836 | ≥30 | ≥2388 | 31-34 | 247-271 | ≤200 | |
| 35EH | 11.7-12.2 | 1.17-1.22 | ≥11.0 | ≥876 | ≥30 | ≥2388 | 33-36 | 263-287 | ≤200 | |
| 38EH | 12.2-12.5 | 1.22-1.25 | ≥11.3 | ≥899 | ≥30 | ≥2388 | 36-39 | 287-310 | ≤200 | |
| AH Series |
30AH | 10.2-10.8 | 1.02-1.08 | ≥10.1 | ≥804 | ≥35 | ≥2706 | 28-30 | 223-247 | ≤220 |
| 33AH | 11.4-11.7 | 1.14-1.17 | ≥10.6 | ≥844 | ≥35 | ≥2706 | 31-33 | 247-263 | ≤220 | |
| 35AH | 11.7-12.1 | 1.17-1.21 | ≥10.9 | ≥876 | ≥35 | ≥2706 | 33-36 | 263-279 | ≤220 | |
Max. working temperature for different grade
| Grade | Working Temp | |
| (L/D=0.7) | ||
| ℃ | ||
| N Series |
N35~N52 | ≤80 |
| M Series |
38M~50M | ≤100 |
| H Series |
35H~48H | ≤120 |
| SH Series |
33SH~48SH | ≤150 |
| UH Series |
30UH~40UH | ≤180 |
| EH Series |
30EH~38EH | ≤200 |
Manufacturing process for magnets (outline)
| Mixing | 1.Mix the ingredients. |
| Melting | 2.Dissolve the mixture at high temperature and prepare an alloy. |
| Fine pulverization | 3.Turn the alloy into fine powder. |
| Molding in a magnetic field | 4.When pressing the fine powder, apply a magnetic field to it and prepare a molded product of powder with aligned directions of magnetization. |
| Sintering and heat treatment | 5.Sinter the product at about 1,100℃, and then subject it to heat treatment at about 600℃ to increase its magnetic characteristics. |
| Processing | 6.Process the manufactured magnet base material and finish it into the product shape. |
| Surface treatment | 7.Subject the product to surface treatment in order to make it rustproof. |
| Magnetization | 8.Apply a magnetic field to give the magnet magnetism. |
Application
Applications of Neodymium - Ideal for applications where a very high magnetic force is needed in a small area. Medical equipment,magnetic separators,linear actuators, microphone assemblies, servo motors, DC motors (automotive starters), computer rigid disc drives, printers and speakers are a few examples.
Other Characteristics
Tolearance Control
| Name | Dimension(mm) | Tolerance(mm) |
| Wall thickness | T≤10 | ±0.04 |
| 10<T≤30 | ±0.05 | |
| 30<T≤50 | ±0.06 | |
| Length | L≤10 | ±0.04 |
| 10<L≤30 | ±0.05 | |
| 30<T≤50 | ±0.05 | |
| L>50 | ±0.08 | |
| Width | W>50 | ±0.05 |
| L>50 | W≥50 | ±0.08 |
Available size: L≤200mm,W≤100mm,T: 1.5~50mm,H3~60mm
Physical Properties & Application to Environment of the Coating
| Coating Material | Colour | Properties | Environment of Application | Thickness of Coating layer |
| Zinc | Blue, Black and rainbow etc | Compact, Stable and Homogeneous | With reasonalbe capability of anticorrosion | 6um≤∮≤12 |
| Nickel-Copper-Nickel | White and black | Light and Stable | Suitable for higher corrosive environment | 15μm≤∮≤30pm |
| Phosphorization | Colorless or light gray | uniform thickness | short-term anticorrosion | - |
| Epoxy | Black and Gray | layer with certain luster, insurability | Suitable for higher corrosive environment | ≥15μm |
| Parylene | transparency | uniform thickness, density pinholes-free and insurability | Excellent capability of anticorrosion especially for small items | 0.1μm≤∮≤100pm |
| Ni+Cu+Epoxy | Black | Layer with certain luster | Excellent capability of | 10-30μm |
| anticorrosion. Suitable for | ||||
| hostile environment | ||||
| salt spray resistance>300hr | ||||
| Al+Epoxy | Black | Layer with certain luster | Excellent capability of | 15-35μm |
| anticorrosion. Suitable for | ||||
| hostile environment | ||||
| salt spray resistance>650hr Widely used in new energy | ||||
| auto magnets |
