Sintered NdFeB Magnets and Assemblies

NdFeB permanent magnet has extremely high properties (high residual induction, coercive force and energy product) with really competitive price. It can be machined into all kinds of shapes easily and used in many fundamental fields directly, such as new energy, vehicles, electron & electroacoustic, energy saving household appliances, industrial motor, instrument & apparatus, nuclear magnetic resonance, magnetic suspension field and so on. Magnets are also suitable for the high property, mini-size and lighted products.

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Technical information

Features
Typical Applications
Technical Specifications

Features

AT&M is a magnetic material supplier with R&D, production and sales ability. We are providing top level magnets with customized coatings, weights and shapes. We also provide the design program, great service and technical support during all life cycle.

AT&M has great power in R&D and holds Hitachi license. We have two production bases in Beijing and Shandong producing high grade magnets. The total capacity reaches 6000t. For the past several year, we supplied top level products and service to the customers including the world top 500 enterprises.

Typical Applications

Typical applications are as below:

• vehicle

EPS motor/drive motor/electricity generator/pump/sensors

• electronics

mobile/digital camera/hard disk drive/CD drive

• automation

servo motor/elevator motor/liner motor/electric tools

• energy

wind power

• environment

inverter air-conditioner/refrigerator/washing machine

• medical technology

nuclear magnetic resonance/CT scanner/ventilator

• aerospace & ship

ship powertrain

• railway

electricity powertrain

Technical Specifications

AT&M Materials Grade Chart
Grade	Br		Hcb / ≥		Hcj / ≥		(BH)max
	T	KGs	kA/m	kOe	kA/m	kOe	kJ/m³	MGOe
ATMAX42	1.28~1.34	12.8~13.4	876	11.0	955	12	318~342	40~43
ATMAX45	1.32~1.38	13.2~13.8	876	11.0	955	12	342~366	43~46
ATMAX48	1.36~1.43	13.6~14.3	836	10.5	955	12	358~390	45~49
ATMAX50	1.39~1.46	13.9~14.6	836	10.5	955	12	374~406	47~51
ATMAX52	1.42~1.48	14.2~14.8	836	10.5	955	12	390~422	49~53
ATMAX54	1.44~1.51	14.4~15.1	836	10.5	955	12	398~438	50~55
ATMAX56	1.46~1.53	14.6~15.3	836	10.5	955	12	414~454	52~57
ATMAX42M	1.28~1.34	12.8~13.4	938	11.8	1114	14	318~342	40~43
ATMAX45M	1.32~1.38	13.2~13.8	976	12.2	1114	14	342~366	43~46
ATMAX48M	1.36~1.43	13.6~14.3	1012	12.7	1114	14	358~390	45~49
ATMAX50M	1.39~1.46	13.9~14.6	1035	13.0	1114	14	374~406	47~51
ATMAX52M	1.42~1.48	14.2~14.9	1042	13.1	1114	14	382~422	48~53
ATMAX40H	1.25~1.31	12.5~13.1	912	11.5	1353	17	302~326	38~41
ATMAX42H	1.28~1.34	12.8~13.4	938	11.8	1353	17	318~342	40~43
ATMAX45H	1.32~1.38	13.2~13.8	976	12.2	1353	17	342~366	43~46
ATMAX48H	1.36~1.43	13.6~14.3	1000	12.6	1353	17	358~390	45~49
ATMAX50H	1.39~1.46	13.9~14.6	1035	13	1353	17	374~406	47~51
ATMAX52H	1.42~1.48	14.2~14.9	1042	13.1	1274	16	382~422	48~53
ATMAX38SH	1.21~1.27	12.1~12.7	886	11.1	1592	20	287~310	36~39
ATMAX40SH	1.25~1.31	12.5~13.1	912	11.5	1592	20	302~326	38~41
ATMAX45SH	1.32~1.38	13.2~13.8	976	12.2	1592	20	342~366	43~46
ATMAX48SH	1.36~1.43	13.6~14.3	1000	12.6	1592	20	358~390	45~49
ATMAX50SH	1.39~1.46	13.9~14.6	1035	13	1592	20	374~406	47~51
ATMAX48SH-D	1.36~1.43	13.6~14.3	1000	12.6	1592	20	358~390	45~49
ATMAX50SH-D	1.39~1.46	13.9~14.6	1035	13	1592	20	374~406	47~51
ATMAX52SH-D	1.42~1.49	14.2~14.9	1050	13.2	1592	20	390~422	49~53
ATMAX54SH-D	1.44~1.51	14.4~15.1	1058	13.3	1592	20	390~422	50~55
ATMAX35UH	1.16~1.22	11.6~12.2	845	10.6	1990	25	263~287	33~36
ATMAX38UH	1.21~1.27	12.1~12.7	886	11.1	1990	25	287~310	36~39
ATMAX40UH	1.25~1.31	12.5~13.1	912	11.5	1990	25	302~326	38~41
ATMAX42UH	1.28~1.34	12.8~13.4	938	11.8	1990	25	318~342	40~43
ATMAX45UH	1.31~1.37	13.1~13.7	976	12.2	1990	25	342~366	43~46
ATMAX45UH-D	1.31~1.37	13.1~13.7	976	12.2	1990	25	342~366	43~46
ATMAX48UH-D	1.36~1.43	13.6~14.3	1000	12.6	1990	25	358~390	45~49
ATMAX50UH-D	1.39~1.46	13.9~14.6	1035	13	1990	25	374~406	47~51
ATMAX31AH	1.09~1.16	10.9~11.6	772	9.7	2149	27	231~263	29~33
ATMAX34AH	1.15~1.22	11.5~12.2	836	10.5	2149	27	255~287	32~36
ATMAX37AH	1.20~1.26	12.0~12.6	886	11.1	2149	27	279~310	35~39
ATMAX40AH	1.25~1.31	12.5~13.1	912	11.5	2149	27	302~326	38~41
ATMAX42AH	1.28~1.34	12.8~13.4	938	11.8	2149	27	318~342	40~43
ATMAX42AH-D	1.28~1.34	12.8~13.4	938	11.8	2149	27	318~342	40~43
ATMAX45AH-D	1.32~1.38	13.2~13.8	976	12.2	2149	27	342~366	43~46
ATMAX48AH-D	1.35~1.42	13.5~14.2	1000	12.6	2149	27	358~390	45~49
ATMAX30EH	1.07~1.14	10.7~11.4	772	9.7	2388	30	223~247	28~31
ATMAX33EH	1.12~1.19	11.2~11.9	816	10.2	2388	30	247~271	31~34
ATMAX35EH	1.16~1.22	11.6~12.2	845	10.6	2388	30	263~287	33~36
ATMAX38EH	1.21~1.27	12.1~12.7	886	11.1	2388	30	279~310	35~39
ATMAX40EH	1.25~1.31	12.5~13.1	912	11.5	2388	30	302~326	38~41
ATMAX40EH-D	1.25~1.31	12.5~13.1	912	11.5	2388	30	302~326	38~41
ATMAX42EH-D	1.28~1.34	12.8~13.4	938	11.8	2388	30	318~342	40~43
ATMAX45EH-D	1.32~1.38	13.2~13.8	976	12.2	2388	30	342~366	43~46
ATMAX48EH-D	1.35~1.42	13.5~14.2	1000	12.6	2388	30	342~366	43~46
ATMAX30TH	1.06~1.15	10.6~11.5	765	9.6	2627	33	223~255	28~32
ATMAX33TH	1.12~1.19	11.2~11.9	816	10.2	2627	33	247~271	31~34
ATMAX35TH	1.16~1.22	11.6~12.2	845	10.6	2627	33	263~287	33~36
ATMAX38TH	1.21~1.27	12.1~12.7	886	11.1	2627	33	279~310	35~39
ATMAX40TH-D	1.25~1.31	12.5~13.1	912	11.5	2627	33	302~326	38~41
ATMAX42TH-D	1.28~1.34	12.8~13.4	938	11.8	2627	33	318~342	40~43
ATMAX45TH-D	1.32~1.38	13.2~13.8	976	12.2	2627	33	342~366	43~46

Coating Type	Physical Properties	Environment of Magnet Application	Thickness of Coating Layer	Pictures
Zinc	Layer with three kinds of color: silver, blue and white, rainbow etc.Coating layer is compact, stable and homogeneous.	Suitable for common environment.	4µm ~ 10µm
Nickel	Homogeneous and Light yellow layer.	NiCuNi：Excellent corrosion resistance. Superior resistance against humidity and heat.	15µm ~ 30µm
Epoxy	Black, gray layer with certain luster.	Suitable for higher corrosive environment.	≥15µm
Al	The coating has silver-white metallic luster, uniform color and clean surface	It is used in high anti-corrosion occasions, and the coating has no shielding effect on magnetic properties.	10µm ~ 25µm
Passivation (Phosphorization)	Colorless or light gray layer	Suitable for the situation of short-term transportation and storage.	≤2µm
Micro Bluing	Colorless or light blue layer	Suitable for the situation of short-term transportation and storage.	≤2µm

Curie Point	℃	310～370
Reversible temp coeffcient of Br 20-120℃	％/℃	-0.1~-0.13%
Reversible temp coeffcient of Hcj 20-120℃	％/℃	-0.4~-0.7%
Density	g/cm³	7.3～7.7
Vickers hardness	Hv	500～700
Bending strength	Mpa	150～400
Compressive strength	Mpa	800～1250
Specific resistiance	μΩcm	110～170
Thermal conductivity	W/(m.℃)	5～15
Coefficient of thermal expansion	10^-6/℃	4～9
Coefficient of thermal expansion	10^-6/℃	-2～0
Specific heat	J/(kg.℃)	350～550
Young’s modulus	GPa	140～170