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Alnico Magnets

Alnico Magnet
Alnico magnet alloy is largely comprised of Aluminum, Nickel, Cobalt and Iron. Alnico is a moderately expensive magnet material because of the Cobalt and Nickel content. This alloy has very good corrosion resistance and a high maximum operating temperature. Some grades of this alloy can operate upwards of 550•C. Magnets made with this alloy are available in a variety of grades and dimensions and they are usually cast and finish ground to size. Alnico magnet material is a mature technology and it has a relatively low Energy Product (BHmax) . This material is now mainly used in military, aerospace, older proprietary designs and in applications where the magnet will be exposed to elevated temperaturesv



Magnetic Property of Alnico

MAGNETIC CHARACTERISTICS OF CAST ALNICO
1.Isotropy
	Br	Hcb	(BH)max	D	Tc	Tw	aBr	MMPA Equivalent	IEC Equivalent
Grade	[mT]	[KAm]	[Kj/M3]	[g/m3]	[•C]	[•C]	[%•C]
	[Gs]	[Oe]	[MGOe]
LN9	690	37	9.0	6.9	760	450	-0.03	Alnico3	Alnico9/3
	6900	470	1.13
LN10	600	40	10.0	6.9	760	450	-0.03	Alnico3	Alnico9/3
	6000	500	1.25
LN12	720	45	12.0	7.0	810	450	-0.03	Alnico3	Alnico12/6
	7200	600	1.50
LN13	700	48	13.0	7.0	810	450	-0.03	Alnico3	Alnico12/6
	7000	600	1.63

MAGNETIC CHARACTERISTICS OF CAST ALNICO
	Br	Hcb	(BH)max	D	Tc	Tw	aBr	MMPA Equivalent	IEC Equivalent
Grade	[mT]	[KAm]	[Kj/M3]	[g/m3]	[•C]	[•C]	[%•C]
	[Gs]	[Oe]	[MGOe]
LN16	800	53	16.0	7.3	850	525	-0.02	[Alnico4]	/
	8000	660	2.00
LN18	1050	46	30.0	7.3	850	525	-0.02	[Alnico4]	/

MAGNETIC CHARACTERISTICS OF CAST ALNICO
1.Isotropy
	Br	Hcb	(BH)max		D	Tc	Tw	aBr	MMPA Equivalent	IEC Equivalent
Grade	[mT]	[KAm]	[Kj/M3]		[g/m3]	[•C]	[•C]	[%•C]
	[Gs]	[Oe]	[MGOe]
LNG32	1180	46	32.0		7.3	890	525	-0.02	[Alnico5]	/
	11800	575	4.00
LNG34	1180	46	34.0		7.3	890	525	-0.02	[Alnico5]	/
	11800	575	4.25
LNG37	1200	48	7.0		7.3	890	525	-0.02	Alnico5	Alnico37/5
	12000	600	4.65
LNG40	1250	48		40.0	7.3	890	525	-0.02	Alnico5	/
LNG44	1250	52		44.0	7.3	890	525	-0.02	Alnico5	Alnico44/5
	12500	650		45.0
LNG48	1250	52		48.0	7.3	890	525	-0.02	Alnico5DG	Alnico52/6
	12500	650		6.00
LNG52	1300	56		52.0	7.3	890	525	-0.02	Alnico5DG	Alnico52/6
	13000	700		6.50
LNG60	1350	56		60.0	7.3	890	525	-0.02	Alnico5~7	/

MAGNETIC CHARACTERISTICS OF CAST ALNICO
1.Isotropy
	Br	Hcb		(BH)max		D	Tc	Tw	aBr	MMPA Equivalent	IEC Equivalent
Grade	[mT]	[KAm]		[Kj/M3]		[g/m3]	[•C]	[•C]	[%•C]
	[Gs]	[Oe]		[MGOe]
LNGT28	1050	56		28.0		7.3	860	525	-0.02	Alnico6	Alnico26/6
	10500	700		3.50
LNGT18	580	90		18.0		7.3	860	550	-0.03	[Alnico7]	Alnico17/9
	5800	1130		2.2
LNGT32	800	100		32.0		7.3	860	550	-0.03	Alnico8	Alnico38/11
	8000	1250		4.0
LNGT34	800	104			34.0	7.3	860	550	-0.03	Alnico8	Alnico38/11
	8000	1300			4.25
LNGT38	820	110			38.0	7.3	860	550	-0.03	Alnico8	Alnico38/11
	8200	1380			4.75
LNGT44	880	120			44.0	7.3	860	550	-0.03	Alnico8	/
	8800	1500			5.50
LNGT60	900	110			60.0	7.3	860	550	-0.03	Alnico9	Alnico11
	9000	1380			7.50
LNGT72	1050	112			72.0	7.3	860	550	-0.03	Alnico9	/
	10500	1410			9.00
LNGT82	1100		120		82.0	7.3	860	550	-0.03	Alnico9	/
	11000		1500		10.25
LNGT36J	700		140		36.0	7.3	860	550	-0.03	Alnico8HC	Alnico36/15

Typical Physical Properties of Alnico
Curie Temperature(•C)	860
Maximum Operating Temperature(•C)	450-550
Resistivity(µ ohm.cm)	47-54
Hardness(Hv)	520-630
Density(g/cm3)	6.90-7.30
Relative Recoil Permeability(µrec)	1.70-4.70
Saturation Field Strength,Koe(kA/m)	2.7-6.3(215-5000)
Temperature Coefficient of Br(%/•C)	-0.025~-0.02
Temperature Coefficient of Hc(%/•C)	+0.01~+0.03

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Alnico Magnets Related Keywords: Powerfull Alnico magnets , Alnico Magnet Information , Cast Alnico Magnet ,
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