Business Type: Manufacturer/Factory,Trading Company
Ningbo, Zhejiang, China
Rare Earth Permanent Neodymium sintered Block Dics Cylinder Arc NdFeB Magnet | |||||||||||
1. Introduction | |||||||||||
Neodymium-Iron-Boron(NdFeB) magnets are the most powerful and advanced commercialized permanent magnets. NdFeB magnets offers the highest Energy Product (BH)max commercially available. Their typical applications include high performance sensors, various DC motors, linear actuators, MRI, wind energy turbines, acoustic transducers, motors and generators, magneto mechanical devices, and magnetic field and imaging systems,etc. Also, magnets are protected with effective surface treatment to prevent corrosion.![]() | |||||||||||
2. How to Choose Permanent Magnet Materials | |||||||||||
It depend on magnetic force,maximim working temperature,coatings,cost,etc. The bellow list help you select a right permanent magnet material for your applications. | |||||||||||
3.Product Description | |||||||||||
1. Materials: Ne-Fe-B(Neodymium Magnet) | |||||||||||
2. Specifications and Shapes: Various Speciciations and Shapes,which depend on your request. | |||||||||||
3. Certificate: ROHS,Reach,etc. | |||||||||||
4.Specifications | |||||||||||
a.Materials: Neodymium-Ferrum-Boron; | |||||||||||
b.Grade: N35-N54, 35M-52M, 33H-50H, 33SH-45SH, 30UH-42UH, 30EH-38EH,see bellow Chart | |||||||||||
c. Coating: Nckel, Chemical Ni,Zn, epoxy(Black color or Grey Color) gold,Silver, Ni-Cu+Black epoxy,Ni+Sn,parylene,etc; | |||||||||||
d. Shape: Block, Disc,Cylinder Ring, Disc, Cylinder, Arc(Segment), Half Ring, and Customized Design; | |||||||||||
e. Sizes: customized size according to customers' request |
TYPICAL PROPERTY | |||||
MAGNETIC CHARACTERISTICS | |||||
PROPERTIES | BrmT (KGs) | Hcb KA/m (Koe) | Hcj KA/m (KOe) | (BH)max KJ/m³ (MGOe) | Max.TW ºC |
GRADE | |||||
N33 | 1130-1170 (11.3-11.7) | ≥836 (≥10.5) | ≥955 (≥12) | 247-263 (31-33) | 80 |
N35 | 1170-1210 (11.7-12.1) | ≥868 (≥10.9) | ≥955 (≥12) | 263-287 (33-36) | 80 |
N38 | 1210-1250 (12.1-12.5) | ≥899 (≥11.3) | ≥955 (≥12) | 287-310 (36-39) | 80 |
N40 | 1250-1280 (12.5-12.8) | ≥923 (≥11.6) | ≥955 (≥12) | 302-326 (38-41) | 80 |
N42 | 1280-1320 (12.8-13.2) | ≥923 (≥11.6) | ≥955 (≥12) | 318-342 (40-43) | 80 |
N45 | 1320-1380 (13.2-13.8) | ≥876 (≥11.0) | ≥955 (≥12) | 342-366 (43-46) | 80 |
N48 | 1380-1420 (13.8-14.2) | ≥835 (≥10.5) | ≥876 (≥11) | 366-390 (46-49) | 80 |
N50 | 1400-1450 (14.0-14.5) | ≥796 (≥10.0) | ≥876 (≥11) | 382-406 (48-51) | 60 |
N52 | 1430-1480 (14.3-14.8) | ≥796 (≥10.0) | ≥876 (≥11) | 398-422 (50-53) | 60 |
N35M | 1170-1220 (11.7-12.2) | ≥868 (≥10.9) | ≥1114 (≥14) | 263-287 (33-36) | 100 |
N38M | 1220-1250 (12.2-12.5) | ≥899 (≥11.3) | ≥1114 (≥14) | 287-310 (36-39) | 100 |
N40M | 1250-1280 (12.5-12.8) | ≥923 (≥11.6) | ≥1114 (≥14) | 302-326 (38-41) | 100 |
N42M | 1280-1320 (12.8-13.2) | ≥955 (≥12.0) | ≥1114 (≥14) | 318-342 (40-43) | 100 |
N45M | 1320-1380 (13.2-13.8) | ≥995 (≥12.5) | ≥1114 (≥14) | 342-366 (43-46) | 100 |
N48M | 1360-1430 (13.6-14.3) | ≥1027 (≥12.9) | ≥1114 (≥14) | 366-390 (46-49) | 100 |
N50M | 1400-1450 (14.0-14.5) | ≥1033 (≥13.0) | ≥1114 (≥14) | 382-406 (48-51) | 100 |
33H | 1130-1170 (11.3-11.7) | ≥836 (≥10.5) | ≥1353 (≥17) | 247-271 (31-34) | 120 |
35H | 1170-1210 (11.7-12.1) | ≥868 (≥10.9) | ≥1353 (≥17) | 263-287 (33-36) | 120 |
38H | 1210-1250 (12.1-12.5) | ≥899 (≥11.3) | ≥1353 (≥17) | 287-310 (36-39) | 120 |
40H | 1240-1280 (12.4-12.8) | ≥923 (≥11.6) | ≥1353 (≥17) | 302-326 (38-41) | 120 |
42H | 1280-1320 (12.8-13.2) | ≥955 (≥12.0) | ≥1353 (≥17) | 318-342 (40-43) | 120 |
45H | 1300-1360 (13.0-13.6) | ≥963 (≥12.1) | ≥1353 (≥17) | 342-358 (43-46) | 120 |
48H | 1370-1430 (13.7-14.3) | ≥995 (≥12.5) | ≥1353 (≥17) | 358-390 (46-49) | 120 |
33SH | 1130-1170 (11.3-11.7) | ≥844 (≥10.6) | ≥1592 (≥20) | 247-272 (31-34) | 150 |
35SH | 1170-1210 (11.7-12.1) | ≥876 (≥11.0) | ≥1592 (≥20) | 263-287 (33-36) | 150 |
38SH | 1210-1250 (12.1-12.5) | ≥907 (≥11.4) | ≥1592 (≥20) | 287-310 (36-39) | 150 |
40SH | 1240-1280 (12.4-12.8) | ≥939 (≥11.8) | ≥1592 (≥20) | 302-326 (38-41) | 150 |
42SH | 1280-1320 (12.8-13.2) | ≥987 (≥12.4) | ≥1592 (≥20) | 318-342 (40-43) | 150 |
45SH | 1320-1380 (13.2-13.8) | ≥1003 (≥12.6) | ≥1592 (≥20) | 342-366 (43-46) | 150 |
28UH | 1020-1080 (10.2-10.8) | ≥764 (≥9.6) | ≥1990 (≥25) | 207-231 (26-29) | 180 |
30UH | 1080-1130 (10.8-11.3) | ≥812 (≥10.2) | ≥1990 (≥25) | 223-247 (28-31) | 180 |
33UH | 1130-1170 (11.3-11.7) | ≥852 (≥10.7) | ≥1990 (≥25) | 247-271 (31-34) | 180 |
35UH | 1180-1220 (11.8-12.2) | ≥860 (≥10.8) | ≥1990 (≥25) | 263-287 (33-36) | 180 |
38UH | 1220-1250 (12.2-12.5) | ≥876 (≥11.0) | ≥1990 (≥25) | 287-310 (36-39) | 180 |
40UH | 1240-1280 (12.4-12.8) | ≥899 (≥11.3) | ≥1990 (≥25) | 302-326 (38-41) | 180 |
28EH | 1040-1090 (10.4-10.9) | ≥780 (≥9.8) | ≥2388 (≥30) | 207-231 (26-29) | 200 |
30EH | 1080-1130 (10.8-11.3) | ≥812 (≥10.2) | ≥2388 (≥30) | 223-247 (28-31) | 200 |
33EH | 1130-1170 (11.3-11.7) | ≥836 (≥10.5) | ≥2388 (≥30) | 247-271 (31-34) | 200 |
35EH | 1170-1220 (11.7-12.2) | ≥876 (≥11.0) | ≥2388 (≥30) | 263-287 (33-36) | 200 |
38EH | 1220-1250 (12.2-12.5) | ≥899 (≥11.3) | ≥2388 (≥30) | 287-310 (36-39) | <=200 |
Characteristic Comparisons | |||||||
Grade | N | M | H | SH | UH | EH | AH |
Max.TW | 80ºC | 100ºC | 120ºC | 150ºC | 180ºC | 200ºC | 250ºC |
Property | Low | High | Higher | Supperior high | Extremely high | Highest | |
Hcj Value | >=11KOe | >=14KOe | >=17KOe | >=20KOe | >=25KOe | 30>=11KOe | >=35KOe |
Surface | Coating | Colour | Thickness(μm) | Standard Resistance | Corrosive Resistance | |||||||
PCT Test | Salt Spray Test | |||||||||||
Nickel | Nickel | Silver | 10-20 | 48hr or 72hr | 72hr | EXCELLENT | ||||||
Ni+Cu+Ni | ||||||||||||
Zinc | Blue Zinc | Bright Blue | 8-20 | 24hr | 24hr | GOOD | ||||||
Colour Zinc | Shinny Colour | |||||||||||
Epoxy | Epoxy | Black / Grey | 15-25 | 48hr | 96hr | EXCELLENT | ||||||
Ni+Cu+Epoxy | ||||||||||||
Tin | Ni+Cu+Sn | Silver | 15-20 | 72hr | 72hr | SUPERIOR | ||||||
Parylene | Parylene | Grey | 15-25 | 96hr | 200hr | SUPERIOR | ||||||
Teflon | Teflon | Grey | 10-20 | 12hr | 24hr | SUPERIOR | ||||||
Phosphorization | / | Grey | 1-2 | - | - | TEMPORARY PROETCTION | ||||||
Passivation | / | Grey | 1-2 | - | - | TEMPORARY PROETCTION | ||||||
* PCT test(120ºC,100%RH,2.0atm);Salt Spray Test(5%NaCl,35ºC continue spray). | ||||||||||||
Item | Parameters | Reference Value | ||||||||||
Additional | Temp.Coeff.of Br (α(Br))/(%/K) | -0.08 ~ -0.12 | ||||||||||
Temp.Coeff.of Hcj (β(Hcj))/(%/K) | -0.42 ~ -0.70 | |||||||||||
Curie Temperature (Tc)/K | 310 ~ 380 | |||||||||||
Recoil Permeability (μrec)[-] | 1.05 | |||||||||||
Mechanical | Density (g/cm³) | 7.6 | ||||||||||
Vickers Hardness (Hv) | 650 | |||||||||||
Electrical Resistivity (μΩom) | 1.4 | |||||||||||
Compressive Strength (Mpa) | 1050 | |||||||||||
Tensile Strength (Mpa) | 80 | |||||||||||
Bending Strength (Mpa) | 290 | |||||||||||
Thermal Conductivity (W/(moK)) | 6 ~ 8 | |||||||||||
Young's Modulus (Gpa) | 160 | |||||||||||
Coefficient of Thermal Expansive (C⊥) (10-6/K) | -1.5 | |||||||||||
Coefficient of Thermal Expansive (C‖) (10-6/K) | 6.5 | |||||||||||
* Technical specifications and parameters are subjected to change without notice. |