Product name :Permanent magntes





The most powerful magnets available, Sintered NdFeB is produced by powder metallurgical process with chemical composition of Nd2Fe14B, which are hard, brittle and easily corrode, involving the sintering of compacts under vacuum. Poorest corrosion resistance of all commercial magnetic material. Grinding and slicing possible; very reactive with moisture and oxygen; coating may be applied depending on the expected environment. The sintered NdFeB magnet has high remanence, high coercive force, high-energy product and high ratio between performance value and product cost. It may be easily formed into various sizes. The intrinsic coercive force is over 30,000 Oe. Neodymium magnets lose -0.09 ~ -0.13% of Br/°C. Their working stability is under 80°C for low Hci. Neodymium magnets and above 200°C for high Hci Neodymium magnets. The highest (BH)max reaches up to 51MGOe . The choice of Strip casting and HDDR technology in our factory allows us to make high performance NdFeB over N52 possible. Surface treatments have been developed that allow the sintered NdFeB magnet to be used in most applications. The treatments include gold, nickel, zinc and tin plating and epoxy resin coating.

1. Materials:Neodymium-Iron-Boron;
2. Grades:N33-N52, 33M-48M, 33H-48H, 30SH-45SH, 30UH-38UH and 30EH-35EH;
3. Shapes and sizes: according to customers' request;
4. Coatings: Ni, Zn, gold, copper, epoxy, chemical, parylene and so on;.
5. Applications:sensors, motors, rotors, wind turbines/wind generators, loudspeakers, magnetic hooks, magnetic holder, filters automobiles and so on;
6. Utilizations of new Sintered NdFeB magnet techniques and equipment such as strip casting,HDDR technology;
7. High coercive force, the max operation temp is up to 200 degree centigrade or 380 curie temperature;

Magnetic Properties of Sintered NdFeB Magnets

Grade Remanence Coercivity Force Intrinsic Coercive Force Max. Energy Product maximum Operating Temp. Br Hcb Hcj ( BH ) max mT kGs kA/m kOe kA/m kOe kJ/m3 MGOe N27 1030-1080 10.3-10.8 ≥796 ≥10.0 ≥955 ≥12 199-231 25-29 80 ℃ N30 1080-1130 10.8-11.3 ≥796 ≥10.0 ≥955 ≥12 223-247 28-31 80 ℃ N33 1130-1170 11.3-11.7 ≥836 ≥10.5 ≥955 ≥12 247-271 31-34 80 ℃ N35 1170-1220 11.7-12.2 ≥868 ≥10.9 ≥955 ≥12 263-287 33-36 80 ℃ N38 1220-1250 12.2-12.5 ≥899 ≥11.3 ≥955 ≥12 287-310 36-39 80 ℃ N40 1250-1280 12.5-12.8 ≥907 ≥11.4 ≥955 ≥12 302-326 38-41 80 ℃ N42 1280-1320 12.8-13.2 ≥915 ≥11.5 ≥955 ≥12 318-342 40-43 80 ℃ N45 1320-1380 13.2-13.8 ≥923 ≥11.6 ≥955 ≥12 342-366 43-46 80 ℃ N48 1380-1420 13.8-14.2 ≥923 ≥11.6 ≥876 ≥12 366-390 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 ℃ 30M 1080-1130 10.8-11.3 ≥796 ≥10.0 ≥1114 ≥14 223-247 28-31 100 ℃ 33M 1130-1170 11.3-11.7 ≥836 ≥10.5 ≥1114 ≥14 247-263 31-33 100 ℃ 35M 1170-1220 11.7-12.2 ≥868 ≥10.9 ≥1114 ≥14 263-287 33-36 100 ℃ 38M 1220-1250 12.2-12.5 ≥899 ≥11.3 ≥1114 ≥14 287-310 36-39 100 ℃ 40M 1250-1280 12.5-12.8 ≥923 ≥11.6 ≥1114 ≥14 302-326 38-41 100 ℃ 42M 1280-1320 12.8-13.2 ≥955 ≥12.0 ≥1114 ≥14 318-342 40-43 100 ℃ 45M 1320-1380 13.2-13.8 ≥995 ≥12.5 ≥1114 ≥14 342-366 43-46 100 ℃ 48M 1360-1430 13.6-14.3 ≥1027 ≥12.9 ≥1114 ≥14 366-390 46-49 100 ℃ 50M 1400-1450 14.0-14.5 ≥1033 ≥13.0 ≥1114 ≥14 382-406 48-51 100 ℃ 30H 1080-1130 10.8-11.3 ≥796 ≥10.0 ≥1353 ≥17 223-247 28-31 120 ℃ 33H 1130-1170 11.3-11.7 ≥836 ≥10.5 ≥1353 ≥17 247-271 31-34 120 ℃ 35H 1170-1220 11.7-12.2 ≥868 ≥10.9 ≥1353 ≥17 263-287 33-36 120 ℃ 38H 1220-1250 12.2-12.5 ≥899 ≥11.3 ≥1353 ≥17 287-310 36-39 120 ℃ 40H 1250-1280 12.5-12.8 ≥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 13-13.6 ≥963 ≥12.1 ≥1353 ≥17 326-358 43-46 120 ℃ 48H 1370-1430 13.7-14.3 ≥995 ≥12.5 ≥1353 ≥17 366-390 46-49 120 ℃ 30SH 1080-1130 10.8-11.3 ≥804 ≥10.1 ≥1592 ≥20 223-247 28-31 150 ℃ 33SH 1130-1170 11.3-11.7 ≥844 ≥10.6 ≥1592 ≥20 247-271 31-34 150 ℃ 35SH 1170-1220 11.7-12.2 ≥876 ≥11.0 ≥1592 ≥20 263-287 33-36 150 ℃ 38SH 1220-1250 12.2-12.5 ≥907 ≥11.4 ≥1592 ≥20 287-310 36-39 150 ℃ 40SH 1240-1280 12.5-12.8 ≥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 12.5-12.8 ≥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 ℃

Physical Properties of Sintered NdFeB Magnets

Temp.Coeff.of Br -0.11%/ ℃ Temp.Coeff.of Hc -0.60%/ ℃ Density 7.3-7.5g/cm 3 Electrical Resistivity 114 μΩ ..cm  Vickers Hardness 600Hv Flexural Resistivity 25kg/mm Tensile Strength 8.0Kg/mm2  Coeff. Of Thermal Expansion 4X10 -6 / ℃ Specific Heat 0.12Kcal/Kg Thermal Conductivity 7.7kcal/[m.h. ℃ ] Young's Modulus 1.6X10[11]N/m2 Rigidity 0.64N/m2 Poisson's Ratio 0.24  Compressibility 9.8x10-12m2/N Curie Temperature 310-340 ℃