AlNiCo Magnet

Sintered & Cast AlNiCo
Though it names AlNiCo, it is not an alloy containing Aluminum (Al), Nickel (Ni), Cobalt (Co). It also contains Cobalt, Nickel, and Aluminum with the addition of Iron, Copper, and sometimes Titanium that help make them become stronger permanent magnets. Max Working Temperature of AlNiCo ranges from 450°C to 550°C. There are two kinds of AlNiCo, Sintered AlNiCo and Cast AlNiCo. Cast magnets may be manufactured in complex shapes and the mould charge (sand mould) is cheap. But due to the sand mould edges, cast alnico has darkened edges with a slightly rough texture. To get smooth surface, grounding is needed. Sintered AlNiCo offer slightly lower magnetic properties but better mechanical characteristics. Most AlNiCo magnet grades are anisotropic (they can only be magnetized in a single axis /direction – they are the more powerful magnet grades of AlNiCo. The others are isotropic (they can be magnetized in any direction or directions) – they are weaker but offer more design and performance flexibility.
 
＊Customized designs are available.
＊Max working temperature can be as high as 550°C.
＊Disadvantage: Br and BH (max) are not as high as rare earth magnet.
＊Advantage: High energies and relatively low coercivity; High magnetic flux density; low mould charge; stable temperature properties; easy to shape.
 


＊Application:
Electronic Ignition Systems
Watt Hour Meters
Medical Instruments
Guitar Pickups
Industrial Motors
Hand Tools
Vending Machines
Automatic Control Appliance

Magnetic and Physical Properties of Cast Alnico Magnet
Grades	Equivalent  MMPA	Remanence		Coercive  Force		Maximum  Energy  Product		Density	Reversible  Temp.  Coefficient	Reversible  Temp.  Coefficient	Curie T emp.	Temp.  Coefficient	Remark
	Class	Br		Hcb		(BH)max		g/cm3	α（Br）	α（Hcj）	TC	TW
		mT	Gs	KA/m	Oe	KJ/m3	MGOe		%/℃	%/℃	℃	℃
LN10	ALNICO 3	600	6000	40	500	10	1.2	6.9	-0.03	-0.02	810	450	Isotropy
LNG13	ALNICO 2	700	7000	48	600	12.8	1.6	7.2	-0.03	0.02	810	450
LNGT18	ALNICO 8	580	5800	100	1250	18	2.2	7.3	-0.025	0.02	860	550
LNG37	ALNICO 5	1200	12000	48	600	37	4.65	7.3	-0.02	0.02	850	525	Anisotropy
LNG40		1250	12500	48	600	40	5	7.3
LNG44		1250	12500	52	650	44	5.5	7.3
LNG52	ALNICO 5DG	1300	13000	56	700	52	6.5	7.3
LNG60	ALNICO5-7	1350	13500	59	740	60	7.5	7.3
LNGT28	ALNICO 6	1000	10000	57.6	720	28	3.5	7.3	-0.02	0.03	850	525
LNGT36J	ALNICO 8HC	700	7000	140	1750	36	4.5	7.3	-0.025	0.02	860	550
LNGT38	ALNICO 8	800	8000	110	1380	38	4.75	7.3	-0.025	0.02	860	550
LNGT40		820	8200	110	1380	40	5	7.3	-0.025		860	550
LNGT60	ALNICO 9	900	9000	110	1380	60	7.5	7.3	-0.025	0.02	860	550
LNGT72		1050	10500	112	1400	72	9	7.3	-0.025		860	550

Sintered AlNiCo Typical Magnetic Properties
Grade	Remanence		Coercivity		Intrinsic  Coercivity		Max. Energy Product		Density	Working	Remark
										Temp
	Br		Hcb		Hcj		(BH)max			Tc
	KGs	T	KOe	Ka/m	KOe	Ka/m	MGOe	Kj/m3	g/cm3	℃
FLN8	5.2	0.52	0.5	40	0.54	43	1.0-1.25	8月10日	6.8	760	Isotropic
FLNG12	7	0.7	0.5	40	0.54	43	1.5-1.75	12月14日	7	810
FLNGT14	5.7	0.57	0.95	76	0.98	78	1.75-2.0	14-16	7.1	850
FLNGT18	5.6	0.56	1.1	88	1.13	90	2.25-2.75	18-22	7.2	850
FLNG28	10.5	1.05	0.58	46	0.59	47	3.5-4.15	28-33	7.2	850	Anisotropic
FLNG34	11	1.1	0.63	50	0.64	51	4.3-4.8	34-38	7.2	890
FLNGT28	10	1	0.7	56	0.71	57	3.5-3.8	28-30	7.2	850
FKNGT31	7.8	0.78	1.3	104	1.13	90	3.9-4.5	31-36	7.2	890
FLNG33J	6.5	0.65	1.7	135	1.88	150	4.15-4.5	33-36	7.2	850
FLNGT38	8	0.8	1.55	123	1.58	126	4.75-5.3	38-42	7.2	850
FLNGT42	8.8	0.88	1.5	120	1.53	122	5.3-6.0	42-48	7.25	850