Permanent Cast Alnico Magnets with Customized Shape

Product Detail

Among those famous cast alnico magnets manufacturers, it is a professional supplier in China, welcome to wholesale alnico magnet for guitar pickup, alnico 5 magnets, alnico permanent magnets, alnico v magnets, alnico bar magnets from our factory.

Customized Cast Alnico Magnets

Alnico material is comprised of aluminum, nickel, cobalt and iron with varying additions of other elements. There are two different manufacturing processes for Alnico: Cast and sintered.




Cast Alnico magnets can be made into many shapes and sizes during manufacturing process by using the casting processing method. Cast Alnico magnets are manufactured by pouring the molten metal alloy of Alnico into a mold and then further processing it through heat treated and cooled alternatively. The solidified material has a dark gray appearance on the exterior and may be roughly ground. Magnets that have been polished using machines, may have a shiny gray surface similar to that of steel.




Specification

Dimension	Tolerance
Up to 1" Up to 25.4 mm	±1/64" .40 mm
1" to 3" 25.4 to 76.2 mm	±1/32" .81 mm
3" to 5" 76.2 to 127.0 mm	±3/64" 1.19 mm
5" to 7" 127.0 to 177.8 mm	±1/16" 1.59 mm
7" to 9" 177.8 to 228.6 mm	±5/64" 1.98 mm




Advantages of Alnico Magnets

· Cast Alnico offers a near net shape. 

· Cast alnico can be produced to complex shapes with complex magnetic patterns.  

· Alnico Br as high as NdFeB at room temperature.

· Can be used up to 450-550 degrees C (842-932F). 

· Least variation in magnetic output with temperature change of any magnetic material. 

· Can be cast in very large sizes.




Production Properties:

Magnetic Property Parameters of Sintered Alnico
Grades	Equivalent MMPA Class	Remanence		Coercive Force		Coercive Force		Maximum Energy Product		Dens ity	Reversible Temp. Coefficient	Curie Temp.	Temp. Coefficient
		Br		Hcb		Hcb		(BH)max		g/ cm3	a(Hcj)	TC	TW
		mT	Gs	KA/m	Oe	KA/m	Oe	KJ/m3	MGOe		%/°C	°C	°C
SLN8	Alnico3	520	5200	43	540	40	500	8-10	1.0-1.25	6.8	-0.02	760	450
SLNG12	Alnico2	700	7000	43	540	40	500	12-14	1.5-1.75	7	-0.014	810	450
SLNGT18	Alnico8	600	6000	107	1350	95	1200	18-22	2.25-2.75	7.2	-0.02	850	550
SLNGT28	Alnico6	1000	10000	57	710	56	700	28-30	3.5-3.8	7.2	-0.02	850	525
SLNG34	Alnico5	1100	11000	51	640	50	630	34-38	3.5-4.15	7.2	-0.016	890	525
SLNGT31	Alnico8	780	7800	106	1130	104	1300	33-36	3.9-4.5	7.2	-0.02	850	550
SLNGT38		800	8000	126	1580	123	1550	38-42	4.75-5.3	7.2	-0.02	850	550
SLNGT42		880	8800	122	1530	120	1500	42-48	5.3-6.0	7.25	-0.02	850	550
SLNGT38J	Alnico8HC	730	7300	163	2050	151	1900	38-40	4.75-5.0	7.2	-0.02	850	550


Our regular sizes for reference:

Alnico Magnets - Physical Properties
Property	Units	Value Sintered Alnico	Value Cast Alnico
Vickers Hardness	Hv	440	440-620
Density	g/cm3	6.8 - 7.0	6.9 - 7.3
Curie Temp TC	°C	810 - 860	740 - 860
Curie Temp TF	°F	1,400 - 1,580	1,460 - 1,580
Specific Resistance	µO·Cm	50- 70	45 - 75
Bending Strength	kN/mm2	0.35 - 0.76	0.05 - 0.31
Tensile Strength	kN/mm2	0.35- 0.45	0.02 - 0.15
Thermal Expansion	°C-1	+11.0 to +12.4 x10-6	+11.0 to +13.0 x10-6
Note:      The listed values are approximate and should be used as a reference. Any magnetic or physical characteristics should be substantiated before selecting a magnet material. Please engage GME’s Design / Development team members before selecting a design path.

Cylinder
Grade	Dimensions		Application
	A(mm)	B(mm)
LNG40	1.57	9.525	Micro-motors
LNG40	1.7	12	Micro-motors
LNG40	3.175	12.7	Micro-motors
LNG40	4	15	Sensors
LNG40	5	10/15/17/18/20/25.4	Sensors
LNG40	6	25/30/100	Sensors
LNG40	6.35	25.4/31.75	Sensors
LNG40	7	30	Sensors
LNG40	8	20/25/30/50/150	Sensors
LN10	9	5	Sensors
LNG40	9.525	25.4/38.1/63.5	Sensors
LNG40	10	10/12/15/30/140	Sensors
LNG52	10	28	Sensors
LN10	10.4	8	Meters
LNG40	11	50	Sensors
LNG40	12	30/50	Sensors
LNG40	12.7	50.8/76.2	Cows
LNG40	25	20	Assembly
LNG52	38	16	Balances

Ring
Grade	Dimensions		Applications
	A(mm)	B(mm)
LN10	23	4	Odometers
LN10	25	5	Odometers
LN10	23	3.5	Odometers
LNG13	51	5	Meters
LNG13	218	10	Port Machines
LN10	142	9	Port Machines
LNG40	101.6	40	Speakers
LNG40	50.8	25.4	Motors
LNG40	101.6	38.1	Speakers

Block1
Grade	Dimensions					Application
	A	B	C	D	E	Blenders
LNG37	42	20	30	10		Meters
LNG37	55	11	13.4	16		Education
LNG37	28.6	7.6	25.4	8		Holding
LNG37	30	20	20	7.5	D5	Holding
LNG37	45	30	30	11	D5	Holding
LNG37	25.4	15.9		5.6	D4.8	Holding
LNG37	19.05	12.7		5.6	D4.8	Holding
LNG37	31.75	25.4		7.94	D7.1	Holding
LNG37	40	25	25	10		Holding
LNG37	39.6	25.4	25.4	10.3	D5.5	Holding
LNG37	63.5	47.6	46	14.3	D4.8	Holding
LNG37	69.8	57.1	41.3	14.3	2XD7.9	Holding
LNG37	64	12	26	14		Holding
LNG37	17	22	10	6.25		Meters
LNG37	62	26	61	13		Education
LNG37	21	13.1	16.2	6.2		Meters

Block2
Grade	Dimensions				Application
	A	B	C	D
LNG37	63.5	12.7	3.175		Musical Instruments
LNG37	58	12.6	3		Musical Instruments
LNG37	60	12.7	3		Musical Instruments
LNG37	25.4	6.35	6.35		Sensors
LNG37	22.5	4.3	4.3		Sensors
LNG44	69	25	25	15	Magnetic Chucks
LNG37	62	13	3		Musical Instruments
LNG40	75	15	10		Education
LNG37	19	3.2	3.2		Sensors
LNG37	150	16	6		Education
LNG40	25	22.5	7		Meters
LNG40	25	22	7	R4	Meters
LNG40	42	42	20	6.5	Magnetic Chucks
LNG37	45	20	15	7	Magnetic Chucks
LNG37	50	20	20	7	Magnetic Chucks
LNGT72	50	50	40		Magnetic Chucks
LNG52	45	24	15		Magnetic Chucks
LNG52	45	22.5	15		Magnetic Chucks
LNG44	59.5	59.5	25	11	Magnetic Chucks
LNG40	45	18.5	30.5		Magnetic Bases
LNG40	53	19.3	32		Magnetic Bases




Applications 

Mainly used for a variety of Meter, Odometer, Sensors, Motors, Multimeter, Telephone, Mobile, Watermeter, Eletricitymeter, Switch, Adhesion, Loudspeakers Port machines, Musical instruments, Magnetic chucks, Educations, Magnetic Bases etc.