Welcome to Pro-Perfect Magnetics

Sintered NdFeB (Neodymium-Iron-Boron) Magnets are the most powerful rare earth permanent magnets with good performance of high energy product, high residual induction and high coercive force. Now Nd-Fe-B Magnets are widely used in electric motors, VCMs, magnetrons, loudspeakers, sensors, relays, instruments, MRI, and so on.

Sintered NdFeB Magnets are prone to rust, so usually the surface must be treated by coatings. We can do the surface treatment according to customer's requirements, such as Normal Zinc plating, Color Zinc plating, Nickel plating, Nickel + Nickel plating, Nickel + Copper + Nickel plating, Nickel + Tin Plating, Epoxy Coating, Nickel + Epoxy coating, Phosphorated, Gold plating, Silver plating & Copper plating etc.

We can also supply Sintered NdFeB Magnets with Patent License at request.


Zinc Plating	Nickel Plating	Epoxy Coating	Phosphorated

The magnetic characteristics of Sintered NdFeB Magnets:

Grade	Residual Induction ( Br )		Coercive Force ( Hcb , bHc )		Intrinsic Coercive Force ( Hcj , iHc )		Max. Energy Product ( BH max )		Max Working Temp.
Grade	mT	KGs	KA/m	KOe	KA/m	KOe	KJ/m³	MGOe	ºC
N27	1020~1100	10.2~11.0	764~836	9.6~10.5	³ 955	³ 12.0	199~223	25~28	£ 80ºC
N30	1080~1150	10.8~11.5	796~860	10.0~10.8	³ 955	³ 12.0	223~247	28~31	£ 80ºC
N33	1130~1170	11.3~11.7	844~884	10.6~11.1	³ 955	³ 12.0	247~263	31~33	£ 80ºC
N35	1170~1210	11.7~12.1	876~915	11.0~11.5	³ 955	³ 12.0	263~286	33~36	£ 80ºC
N38	1200~1280	12.0~12.8	876~915	11.0~11.5	³ 955	³ 12.0	286~302	36~38	£ 80ºC
N40	1260~1320	12.6~13.2	876~969	11.0~12.2	³ 955	³ 12.0	302~318	38~40	£ 80ºC
N42	1300~1350	13.0~13.5	876~969	11.0~12.2	³ 955	³ 12.0	318~334	40~42	£ 80ºC
N45	1320~1380	13.2~13.8	876~969	11.0~12.2	³ 955	³ 12.0	334~358	42~45	£ 80ºC
N48	1360~1410	13.6~14.1	876~969	11.0~12.2	³ 955	³ 12.0	358~382	45~48	£ 80ºC
N50	1380~1450	13.8~14.5	876~969	11.0~12.2	³ 955	³ 12.0	382~398	48~50	£ 80ºC
N27H	1020~1100	10.2~11.0	764~836	9.6~10.5	³ 1353	³ 17.0	199~223	25~28	£ 120ºC
N30H	1080~1150	10.8~11.5	796~860	10.0~10.8	³ 1353	³ 17.0	223~247	28~31	£ 120ºC
N33H	1130~1170	11.3~11.7	844~884	10.6~11.1	³ 1353	³ 17.0	247~263	31~33	£ 120ºC
N35H	1170~1210	11.7~12.1	876~915	11.0~11.5	³ 1353	³ 17.0	263~286	33~36	£ 120ºC
N38H	1200~1280	12.0~12.8	876~915	11.0~11.5	³ 1353	³ 17.0	286~302	36~38	£ 120ºC
N40H	1260~1320	12.6~13.2	876~969	11.0~12.2	³ 1353	³ 17.0	302~318	38~40	£ 120ºC
N42H	1300~1350	13.0~13.5	876~969	11.0~12.2	³ 1353	³ 17.0	318~334	40~42	£ 120ºC
N45H	1320~1380	13.2~13.8	876~969	11.0~12.2	³ 1353	³ 17.0	334~358	42~45	£ 120ºC
N48H	1360~1410	13.6~14.1	876~969	11.0~12.2	³ 1353	³ 17.0	358~382	45~48	£ 120ºC
N27SH	1020~1100	10.2~11.0	764~836	9.6~10.5	³ 1592	³ 20.0	199~223	25~28	£ 150ºC
N30SH	1080~1150	10.8~11.5	796~860	10.0~10.8	³ 1592	³ 20.0	223~247	28~31	£ 150ºC
N33SH	1130~1170	11.3~11.7	844~884	10.6~11.1	³ 1592	³ 20.0	247~263	31~33	£ 150ºC
N35SH	1170~1210	11.7~12.1	876~915	11.0~11.5	³ 1592	³ 20.0	263~286	33~36	£ 150ºC
N38SH	1200~1280	12.0~12.8	876~915	11.0~11.5	³ 1592	³ 20.0	286~302	36~38	£ 150ºC
N40SH	1260~1320	12.6~13.2	876~969	11.0~12.2	³ 1592	³ 20.0	302~318	38~40	£ 150ºC
N42SH	1300~1350	13.0~13.5	876~969	11.0~12.2	³ 1592	³ 20.0	318~334	40~42	£ 150ºC
N45SH	1320~1380	13.2~13.8	876~969	11.0~12.2	³ 1592	³ 20.0	334~358	42~45	£ 150ºC
N27UH	1020~1100	10.2~11.0	764~836	9.6~10.5	³ 1910	³ 24.0	199~223	25~28	£ 180ºC
N30UH	1080~1150	10.8~11.5	796~860	10.0~10.8	³ 1910	³ 24.0	223~247	28~31	£ 180ºC
N33UH	1130~1170	11.3~11.7	844~884	10.6~11.1	³ 1910	³ 24.0	247~263	31~33	£ 180ºC
N35UH	1170~1210	11.7~12.1	876~915	11.0~11.5	³ 1910	³ 24.0	263~286	33~36	£ 180ºC
N38UH	1200~1280	12.0~12.8	876~915	11.0~11.5	³ 1910	³ 24.0	286~302	36~38	£ 180ºC
N40UH	1260~1320	12.6~13.2	876~969	11.0~12.2	³ 1910	³ 24.0	302~318	38~40	£ 180ºC
N25EH	970~1050	9.7~10.5	748~812	9.4~10.2	³ 2388	³ 30.0	183~207	23~26	£ 200ºC
N28EH	1040~1120	10.4~11.2	780~812	9.8~10.2	³ 2388	³ 30.0	199~223	25~28	£ 200ºC
N30EH	1080~1150	10.8~11.5	796~860	10.0~10.8	³ 2388	³ 30.0	223~247	28~31	£ 200ºC
N33EH	1130~1170	11.3~11.7	844~884	10.6~11.1	³ 2388	³ 30.0	247~263	31~33	£ 200ºC
N35EH	1170~1210	11.7~12.1	876~915	11.0~11.5	³ 2388	³ 30.0	263~286	33~36	£ 200ºC

* Unit Conversion: 1.0KGs=100mT, 1.0KOe=79.6KA/m, 1.0MGOe=7.96KJ/m³.

The physical characteristics of *Sintered NdFeB Magnets*:
Temp. Coeff.of Br: Density: Vickers Hardness: Tensile Strength: Specific Heat Young¡¯s. Modulus: Poisson¡¯s.Ratio Curie Temperature:	-0.11%/ºC 7.4-7.6g/cm3 600Hv 8.0kg/mm2 0.12 kCal/(kg,ºC 1.6x10(11)N/m2 0.24 310-340ºC	Temp.Coeff.of Hc: Electrical Resistivity: Flexural Strength: Coeff. Of Thermal Expansion: Thermal Conductivity: Rigidity: Compressibility	-0.60 % /ºC 114mW.cm 25kg/mm 4x10 -6/ºC 7.7kcal/(m.h.ºC) 0.64N/m2 9.8¡Á10-12 m2/N