Neodymium Iron Boron Rectangular Block Magnets from China manufacturer

Neodymium Iron Boron Rectangular Block Magnets

Price:	1.0~10.0 USD
Payment Terms:	T/T,L/C
Place of Origin:	Zhejiang, China (Mainland)


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Product Detail

Model No.: RM-B13

Production Capacity: 100 ton/month

Delivery Date: 18 days

Shape: Block

Composite: NdFeB Magnet

material: Neodymium Iron Boron

Means of Transport: Ocean,Land

Packing: standard carton by sea or b...

Application: Industrial Magnet

Type: Permanent

Brand Name: Rainbow

Rectangular block magnet with white-blue Zn coating.strong coating to slow down the oxidation rate. it is better resistant to corrosion.

picture show Rectangular Block ndfeb magnet:

Neodymium Iron Boron is a type of rare-earth permanent magnet. It is made from an alloy of neodymium, iron, and boron to form the Nd₂Fe₁₄B tetragonal crystalline structure. This material is currently the strongest type of permanent magnet in the world.

There are two kinds of magnets: Sintered NdFeB magnet and bonded NdFeB magnet.

This NdFeB rectangular block magnet is sintered NdFeB magnet,the magnetized through the thickness.

Nd-Fe-B permanent magnet is manufactured in a wide range of shapes, sizes and grades according customer's demand.

NdFeB has a very high energy product and coercivity, can pick up 660 times of own weight of heavy objects.

The advantage is high cost-effective, with good mechanical properties, easy cutting; according customer's demand to manufacture in a wide range of shapes, sizes and grades.

The shortcoming is easy to rust, oxidation, so the Sintered NdFeB's surface is usually required for plating such as zinc, nickel, silver, gold, etc., can also be done phosphorus treatment or spray epoxy resin to slow down the oxidation rate.

The EH grade and its details properties, the Maximum Operating temperature is under 200 degree.

pls see follow table.

Sintered NdFeB rectangular block magnet magnetic energy parameters

Grade	Residual Induction		Coercive Force		Intrinsic Coercive Force		Maximum Energy Product		Maximum Operating Temperature
	Br		Hcb		Hcj		(BH)max		Tw
	T	KGS	KA/m	KOe	KA/m	KOe	KJ/m3	MGOe	℃
N28EH	1.04-1.08	10.4-10.8	780-812	9.8-10.2	≥2388	≥30	207-223	26-28	≤200
N30EH	1.08-1.12	10.8-11.2	804-844	10.1-10.6	≥2388	≥30	223-239	28-30	≤200
N33EH	1.14-1.17	11.4-11.7	820-876	10.3-11.0	≥2388	≥30	247-263	31-33	≤200
N35EH	1.17-1.21	11.7-12.1	860-907	10.8-11.4	≥2388	≥30	263-279	33-35	≤200
N38EH	1.22-1.26	12.2-12.6	860-907	10.8-11.4	≥2388	≥30	287-303	36-38	≤200

Note: The above mentioned data of magnetic parameters and physical are given at 20℃±2℃

The above demagnazation durve is for 33EH magnet grade at difference temperature.

The main physical properties of sintered NdFeB rectangular block magnet:

magnetic properties	Parameters
Density /g.cm3 Vickers Hardness HV Resistivity /υΩ.cm Compressive strength/N.mm-2 Coefficient of Thermal Expansion (C⊥)/K-1 Coefficient of Thermal Expansion (C∥) /K-1	7.45 570 150 780 -4.8X10-6 -3.4X10-6

This magnet is coated white zinc,it has better resistant to corrosion. pls see the compare of salt spray test results for coating

Commonly type of coating	Coating thickness(um)				Neutral salt spray test
Commonly type of coating	dark Ni	Cu	Shine Ni	Total	Neutral salt spray test
Single-layer Ni	25			25	24h	normal
Double-layer Ni	12		10	25	72h	better
Dark Ni-Cu–shine Ni	6.25	8.75	10	25	120h	excellent