NdFeB ring magnets. permanent rare earth material magnet. from China manufacturer

NdFeB ring magnets. permanent rare earth material magnet.

Price:	0.1~60.0 USD
Payment Terms:	T/T,L/C,WU
Place of Origin:	Zhejiang, China (Mainland)


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Product Detail

Model No.: RM-R13

Production Capacity: 100ton/month

Delivery Date: 4 weeks

Type: Permanent

Brand Name: rainbow magnet

Grade: N/M/H/SH/UH/EH

Means of Transport: Ocean,Land,Air

Packing: standard carton by sea or b...

Application: Speaker Magnet

Composite: Neodymium Magnet

Shape: ring

high quality
various size
Zn coating
grade from N35 to N52.N35M to N50M,N35H to N48H,N35SH to N45SH,N30UH to N40UH,N30EH to N38EH.

The EH grade of NdFeB magnet and its details properties, pls see follow table.

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 andphysical are given at 20℃±2℃

According the max working temperature, we can divide Sinteredmagnet to 7 grades, N grade is for 80 ℃,grade M is for 100℃,grade H isfor 120℃,grade SH is for 120℃,grade UH is for 150℃ and grade EH is for 200℃,youaccording your demand to choose the grade which you need.

Mostly of rare earth permanent magnet always work do notat room temperature or under vacuum, in order to keep the accuracy of shape sizeand avoid the Corrosion and oxidation, we must make the coating on thesurface.

Sometime, the customers have high demand of NdFeB anti-corrosion,antioxidant, we can design the magnet,add some elements, such as: niobium,vanadium, cobalt and other metal to replace part of the iron to catch thecustomer requirements of the acid and alkali resistant,antioxidant level,however, because of special material, we needMOQ for it.

How to judge the Permanent magnet material propertiesadvantages and disadvantages of standard?

You can see 3 terms:

1) the magnet -crystalline anisotropy,

2) the Curie temperature.
3) the magnetization strong

The main physical properties of sintered round permanentmagnet:

magnetic properties	Parameters
Density /g.cm3 VickersHardness HV Resistivity /υΩ.cm Compressivestrength/N.mm-2 Coefficient of ThermalExpansion (C⊥)/K-1 Coefficient of ThermalExpansion (C∥) /K-1	7.45 570 150 780 -4.8X10-6 -3.4X10-6