Sintered NdFeB magnetic steel_Shanghai ROCO Magnetics Co.,Ltd.

Sintered NdFeB Magnet

Sintered NdFeB magnet is contemporary the most powerful magnet magnetic, it not only has high remanence, high coercive force, high magnetic energy product and high performance price excellent characteristics, such as size and easy processing into various shapes, especially suitable for high power, high magnetic field and miniaturization, light-duty and upgrading of products.

CHARACTERISTICS

Grade	Remanence （Br）		Coercive Force （bHc）		Intrisic Coercive Force （Hcj）		Max Energy Product （BH）max		Working Temp (L/D=0.7)
	KGS	T	KOe	KA/m	KOe	KA/m	MGOe	KJ/m?	℃
N35	11.8-12.4	1.18-1.24	≥10.5	≥835	≥12	≥955	≥33	≥263	≤80
N38	12.3-12.8	1.23-1.28	≥10.8	≥859	≥12	≥955	≥36	≥286	≤80
N40	12.6-13.2	1.26-1.32	≥10.8	≥859	≥12	≥955	38-41	302-326	≤80
N42	12.8-13.4	1.28-1.34	≥10.8	≥859	≥12	≥955	40-44	318-350	≤80
N45	13.2-13.8	1.32-1.38	≥11.0	≥875	≥12	≥955	43-47	342-374	≤80
N48	13.6-14.1	1.36-1.41	≥11.2	≥891	≥12	≥955	45-49	358-390	≤80
N50	13.9-14.6	1.39-1.46	≥11.2	≥891	≥12	≥955	47-51	374-405	≤80
N52	14.2-14.6	1.42-1.46	≥10.2	≥812	≥11	≥875	48-53	390-422	≤80
38M	12.3-12.8	1.23-1.28	≥11.5	≥915	≥14	≥1114	36-38	286-302	≤100
40M	12.6-13.2	1.26-1.32	≥11.8	≥939	≥14	≥1114	38-41	302-326	≤100
42M	12.8-13.4	1.28-1.34	≥12.0	≥955	≥14	≥1114	40-43	318-342	≤100
45M	13.2-13.8	1.32-1.38	≥12.2	≥971	≥14	≥1114	43-46	342-366	≤100
48M	13.6-14.0	1.36-1.40	≥12.5	≥995	≥14	≥1114	45-49	358-390	≤100
50M	13.9-14.3	1.39-1.43	≥12.5	≥995	≥14	≥1114	47-51	374-405	≤100
35H	11.7-12.4	1.17-1.24	≥10.8	≥859	≥17	≥1353	33-37	263-295	≤120
38H	12.3-12.8	1.23-1.28	≥11.5	≥915	≥17	≥1353	36-40	286-318	≤120
40H	12.6-13.2	1.26-1.32	≥11.8	≥939	≥17	≥1353	38-41	302-326	≤120
42H	12.8-13.4	1.28-1.34	≥12.0	≥955	≥17	≥1353	40-43	318-342	≤120
45H	13.2-13.8	1.32-1.38	≥12.2	≥971	≥17	≥1353	43-46	342-366	≤120
48H	13.6-14.2	1.36-1.42	≥12.8	≥1019	≥17	≥1274	45-48	358-382	≤120
33SH	11.4-12.0	1.14-1.20	≥10.5	≥835	≥20	≥1592	≥31	≥247	≤150
35SH	11.7-12.5	1.17-1.25	≥10.8	≥859	≥20	≥1592	≥33	≥263	≤150
38SH	12.2-12.7	1.22-1.27	≥11.3	≥899	≥20	≥1592	36-39	286-310	≤150
40SH	12.4-13.0	1.24-1.30	≥11.8	≥939	≥20	≥1592	38-41	302-326	≤150
42SH	12.8-13.6	1.28-1.36	≥12.0	≥955	≥20	≥1592	39-43	310-342	≤150
45SH	13.2-13.7	1.32-1.37	≥12.2	≥971	≥20	≥1592	43-46	342-366	≤150
48SH	13.6-14.1	1.36-1.41	≥12.8	≥1019	≥20	≥1592	45-48	358-382	≤150
30UH	10.8-11.0	1.08-1.10	≥9.5	≥756	≥25	≥1990	28-31	223-247	≤180
33UH	11.3-11.7	1.13-1.17	≥9.8	≥780	≥25	≥1990	31-34	247-270	≤180
35UH	11.7-12.1	1.17-1.21	≥10.5	≥835	≥25	≥1990	33-36	263-286	≤180
38UH	12.2-12.7	1.22-1.27	≥11.3	≥899	≥25	≥1990	36-39	286-310	≤180
40UH	12.4-13.0	1.24-1.30	≥11.8	≥939	≥25	≥1990	38-41	302-326	≤180
30EH	10.8-11.5	1.08-1.15	≥10.1	≥804	≥30	≥2388	28-31	223-247	≤200
32EH	11.3-12.1	1.13-1.21	≥10.5	≥835	≥30	≥2388	30-33	238-263	≤200
35EH	11.8-12.5	1.18-1.25	≥11.0	≥875	≥30	≥2388	33-35	263-278	≤200
38EH	12.2-12.7	1.22-1.27	≥11.3	≥899	≥30	≥2388	36-39	286-310	≤200
40EH	12.4-13.0	1.24-1.30	≥11.8	≥939	≥30	≥2388	38-41	302-326	≤200

1T=10kGs，1kOe=79.6kA／m，lMGOe=7.96kJ／m3。

The open flux irreversible loss of the testing sample at this temperature≤5%.

PHYSICAL PROPERTIES & COATING

Physical Properties of Sintered NdFeB Material

Items	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
抗拉强度 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

Physical Properties & Application to Environment of the Coating

Coating Material	Colour	Properties	Environment of Application	Thickness of Coating layer
Zine	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 insurability and stability	Excellent capability of anticorrosion. Suitable for hostile environment salt spray resistance>300hr	10-30μm
Al+Epoxy	Black	Layer with certain luster insurability and stability	Excellent capability of anticorrosion. Suitable for hostile environment salt spray resistance>650hr Widely used in new energy auto magnets	15-35μm

Demagnetization curve

48H

40SH

38UH

35EH

Size and appearance

A.Product Size
1. Dimension tolerance: length, width, thickness, diameter, etc. (tolerance range is generally not less than + 0.05mm). 2、Form tolerance: vertical degree (0.8°or less), parallel (0.05 mm or less), ovality (0.05 mm or less), concentricity (0.05 mm or less), etc. If the customer has any requirement, it shall follow the standard confirmed after consultation with the customer.

B.Product Appearance
Appearance cleanliness (such as watermark, color), degree of damage (zinc loss, Angle loss, edge knock, black skin), crack, sand hole, knife lines, etc.

Square products

Cylindrical products

Tile shape products

Ring products

Other characteristics

1. Magnetized method: According to the requirements of customers.

2. Polarity requirements: Mark according to customer requirements.

3. Packaging materials and methods: general use kraft paper, foam board and carton packaging, special cases using vacuum packaging and shielding packaging, each weighing less than 20 kg. If customer has special requirements for packaging according to customer requirements.

4. Attached documents:

Certificate of approval

销售检测报告

Sales test report (including appearance, size, density, intrinsic magnetic energy, degaussing curve, etc.)