Neodymium Magnets

Neodymium Magnets Overview

Neodymium magnets, also known as NdFeB magnets, are composed of neodymium (Nd), iron (Fe), and boron (B) in a tetragonal crystalline structure. Renowned for their exceptional strength, they are one of the most widely used rare-earth magnets.

Applications and Characteristics of NdFeB Magnets

Applications

1. Electronics:

Found in hard drives, mobile phones, headphones, and battery-powered tools.
Provide high energy density and excellent magnetic performance, making them essential in modern industrial and electronic technologies.

2. Other Industries:

Machinery
Hardware
Toys
Packaging
Medical devices
Aerospace

Their versatility makes them indispensable for applications requiring compact and powerful magnets.

Types of NdFeB Magnets

1. Sintered NdFeB Magnets:

Require surface coatings (e.g., nickel, zinc, epoxy) to prevent corrosion.

2. Bonded NdFeB Magnets:

Exhibit magnetic properties in all directions.
Naturally resistant to corrosion.

These traits make NdFeB magnets ideal for applications demanding strong magnetic forces. However, their brittleness necessitates careful handling during use to avoid damage.

Product Guidelines: Safe Usage of Magnetized Products

Precautions for Use

Keep magnetized products away from sensitive items such as floppy disks, magnetic cards, cassette tapes, credit cards, electronic devices, digital dashboards, pacemakers, and other medical equipment.

Handling Safety

Due to their strong magnetic force, handle them with care to avoid finger injuries.

Material Durability

NdFeB (Neodymium Iron Boron) and SmCo (Samarium Cobalt) magnets have low impact resistance. Take extra care during transportation and handling to prevent damage or breakage.

These guidelines ensure the safe and efficient use of magnetized products while safeguarding users and surrounding equipment.

Process Flow:

Grade Curve:

Magnetic Performance Table:

Grade	Remanence(Br)				Coercivity(Hcb)		Intrinsic Coercivity Force(Hcj)		Max.Energy Product(BH)m				Working Temp
	kGs		T		KOe	KA/m	KOe	KA/m	MGOe		KJ/m3		℃
	Nom.	min.	Nom.	min.	min.	min.	KOe	KA/m	Nom.	min.	Nom.	min.	℃
N35	12.3	11.8	1.23	1.18	10.8	860	≥12	≥955	36	33	287	263	≤80
N38	12.8	12.3	1.28	1.23	10.8	860	≥12	≥955	39	36	310	287	≤80
N40	13.1	12.6	1.31	1.26	10.8	860	≥12	≥955	41	38	326	302	≤80
N42	13.4	12.9	1.34	1.29	10.8	860	≥12	≥955	43	40	342	318	≤80
N45	13.8	13.3	1.38	1.33	10.8	860	≥12	≥955	46	43	366	342	≤80
N48	14.2	13.7	1.42	1.37	10.8	860	≥12	≥955	49	45	390	358	≤80
N50	14.4	13.9	1.44	1.39	10.8	860	≥12	≥955	51	47	406	370	≤80
N52	14.7	14.2	1.47	1.42	10.5	836	≥12	≥955	53	49	422	390	≤80
N54	15.0	14.5	1.50	1.45	10.5	836	≥12	≥955	55	51	438	406	≤80
N55	15.2	14.7	1.52	1.47	10.5	836	≥12	≥955	56	52	446	414	≤60
N56	15.2	14.8	1.52	1.58	10.5	836	≥12	≥955	56	52	446	414	≤60

38M	12.8	12.3	1.28	1.23	11	876	≥14	≥1114	35	33	279	263	≤100
40M	13.1	12.6	1.31	1.26	11.4	910	≥14	≥1114	38	36	303	287	≤100
42M	13.4	12.9	1.34	1.29	11.8	938	≥14	≥1114	40	38	318	303	≤100
45M	13.8	13.3	1.38	1.33	12.2	971	≥14	≥1114	42	40	334	318	≤100
48M	14.2	13.7	1.42	1.37	12.7	1012	≥14	≥1114	45	43	358	342	≤100
50M	14.4	13.9	1.44	1.39	13.1	1043	≥14	≥1114	48	46	383	367	≤100
52M	14.7	14.2	1.47	1.42	13.1	1043	≥14	≥1114
54M	14.9	14.4	1.49	1.44	13.1	1043	≥14	≥1114
56M	15.0	14.6	1.50	1.46	13.1	1043	≥14	≥1114

N33H	11.7	11.4	1.17	1.14	10.3	820	≥17	≥1353	33	31	263	247	≤120
N35H	12.1	11.7	1.21	1.17	10.8	860	≥17	≥1353	35	33	279	263	≤120
N38H	12.6	12.2	1.26	1.22	11.5	915	≥17	≥1353	38	36	303	287	≤120
N40H	12.9	12.6	1.29	1.26	11.5	915	≥17	≥1353	40	38	318	303	≤120
N42H	13.2	12.9	1.32	1.29	12.2	971	≥17	≥1353	42	40	334	318	≤120
N45H	13.6	13.2	1.36	1.32	12.4	987	≥17	≥1353	45	43	358	342	≤120
N48H	13.8	13.6	1.38	1.36	12.4	987	≥17	≥1353	47	45	375	358	≤120

N30SH	11.2	10.8	1.12	1.08	9.8	780	≥20	≥1595	30	28	239	223	≤150
N33SH	11.7	11.4	1.17	1.14	10.3	820	≥20	≥1595	33	31	263	247	≤150
N35SH	12.1	11.7	1.21	1.17	10.8	860	≥20	≥1595	35	33	279	263	≤150
N38SH	12.6	12.2	1.26	1.22	11.8	939	≥20	≥1595	38	36	303	287	≤150
N40SH	12.9	12.6	1.29	1.26	12	955	≥20	≥1595	40	38	318	303	≤150
N42SH	13.2	12.8	1.32	1.28	12.2	971	≥20	≥1595	42	40	334	318	≤150
N45SH	13.5	13.3	1.35	1.33	12.2	981	≥20	≥1595	45	42	358	334	≤150

N28UH	10.8	10.4	1.08	1.04	9.8	780	≥25	≥1990	28	26	223	207	≤180
N30UH	11.2	10.8	1.12	1.08	10.1	804	≥25	≥1990	30	28	239	223	≤180
N33UH	11.7	11.4	1.17	1.14	10.3	820	≥25	≥1990	33	31	263	247	≤180
N35UH	12.1	11.7	1.21	1.17	10.8	860	≥25	≥1990	35	33	279	263	≤180
N38UH	12.4	12.1	1.24	1.21	11.4	908	≥25	≥1990	38	35	303	279	≤180
N40UH	12.7	12.4	1.27	1.24	11	924	≥25	≥1990	40	38	318	303	≤180
N42UH	13	12.8	1.3	1.28	12	955	≥25	≥1990	42	40	342	318	≤180

N28EH	10.8	10.4	1.08	1.04	9.8	780	≥30	≥2388	28	26	223	207	≤200
N30EH	11.2	10.8	1.12	1.08	10.1	804	≥30	≥2388	30	28	239	223	≤200
N33EH	11.7	11.2	1.17	1.12	10.4	828	≥30	≥2388	33	30	263	239	≤200
N35EH	12.1	11.7	1.21	1.17	10.8	860	≥30	≥2388	36	33	287	263	≤200
N38EH	12.4	12	1.24	1.2	11.6	924	≥30	≥2388	38	35	303	287	≤200

N28AH	10.8	10.4	1.08	1.04	10	796	≥33	≥2626	28	26	223	207	≤240
N30AH	11.2	10.8	1.12	1.08	10.1	804	≥33	≥2626	30	28	239	223	≤240
N33AH	11.7	11.2	1.17	1.12	10.4	828	≥33	≥2626	33	31	263	247	≤240
N35AH	12.1	11.7	1.21	1.17	10.8	860	≥33	≥2626	35	33	279	263	≤240