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PERMANENT MAGNETIC MATERIALS

Rare earth

NdFeB

Smco

Ceramic

Alnico

INDUSTRIAL MAGNETIC DEVICES

Power lift magnets

Magnetic Cup Assemblies

Neodymium Assemblies

Magnetic Swarf colletor

Magnetic Tool Racks

Magnetic Catcher

Magnetic Filter

Telescopic Pick-up Magnet

Cow magnets

Welding Holders

MAGNETIC TOYS

PRODUCTS INFORMATION

What's Alnico
Alnico Magnets derive their name from main constituents - Aluminum, Nickel and Cobalt with Iron as base.

Alnico Magnets

Alnico Magnets can be made by both cast and sintered processes. Alnico Magnets have distinct advantages over other varieties of permanent magnets in terms of moderate prices & widest temperature stability. Alnico is very hard and brittle. Machining or drilling can not therefore be accomplished by ordinary methods. Holes are usually cored in at the foundry. Magnets are cast or sintered as closely as possible to required size so that abrasive grinding to finish dimensions and tolerances is minimized.

DIMENSION
- Standard and Customized

Applications of Alnico Magnets
Speakers, Microphones, Telephones, Micro Motors, Relays, Measuring Instruments (Volt Amp, Speed-Meter, Watt-Hour -Meter), Flywheel Generators (Motor-Cycles, Farming Machine), Separators, Sensors, Holding Devices, Controls, Braking Devices, Security Systems , Toys, Etc.

Demagnetising and Energy Product Curve

Cast Alnico

	Charge preparation (raw ingrediants like Al, Ni, Co, Fe mixed in desired proportion)
	Melting (charge melted in induction furnace at high temperature)
	Pouring (molten charge poured into stacks of sand moulds to prepare cast magnets)
	Cooling (stacks of cast magnets cooled to room temperature)
	Stack breaking (stacks of cast magnets segregated into individual magnets and feed metal)
	Cleaning (cast magnets cleaned by shot blasting and sly barreling)
	Snagging (magnets rough ground to remove flash/surface defects)
	Heat treatment and Grinding (magnets heat - treated and ground to get close tolerance finish and correct warppage)
	Inspection magnets inspected for physical and magnetic properties
	Anti rust treatment (magnets coated with anti rust oil)
	Packing and Dispatch (magnets packed in cartons and dispatched)

Sintered Alnico

	Powder preparation (raw ingredients like Al, Ni, Co, Fe mixed to form a fine homogenized powder)
	Pressing (powder pressed into desired shape in a die)
	Sintering (pressed magnets sintered in hydrogen atmosphere at high temperature)
	Heat Treatment and Grinding (magnets heat-treated and ground to get close tolerance finish and correct wrappage)
	Inspection (magnets inspected for physical and magnetic properties)
	Packing and Dispatch (magnets packed in cartons and dispatched)

MAGNETIC PROPERTIES

Cast AlNiCo
Material	Equivalent MMPA Class	Br		Hcj		BHmax		Den-sity	Temperature Coefficient		Curie Tempe-rature Tc	Working Tempe-rature Tw
Material	Equivalent MMPA Class	mT	Gs	KA/m	Oe	KJ/m³	MGOe	g/cm³	Near Br %/°C	Near Hci %/°C	°C	°C
LN9	AlNiCo 3	680	6800	30	380	9.0	1.13	6.9	-0.03	-0.02	810	450
LN10	AlNiCo 3	600	6000	40	500	10.0	1.20	6.9	-0.03	-0.02	810	450
LNG12	AlNiCo 2	720	7200	45	500	12.4	1.55	7.0	-0.03	-0.02	810	450
LNG13		700	7000	48	600	12.8	1.6	7.0	-0.03	-0.02	810	450
LNG37	AlNiCo5	1200	12000	48	600	37.0	4.65	7.3	-0.02	+0.02	860	525
LNG40		1250	12500	48	600	40.0	5.00	7.3	-0.02	+0.02	860	525
LNG44		1250	12500	52	650	44.0	5.50	7.3	-0.02	+0.02	860	525
LNG52	AlNiCo 5DG	1300	13000	56	700	52.0	6.50	7.3	-0.02	+0.02	860	525
LNG60	AlNiCo 5-7	1350	13500	59	740	60.0	7.5	7.3	-0.02	+0.02	860	525
LNGT28	AlNiCo 6	1000	10000	58	720	28.0	3.50	7.3	-0.02	+0.03	860	525
LNGT36J	AlNiCo 8HC	700	7000	140	1750	36.0	4.50	7.3	-0.025	+0.02	860	550
LNGT18	AlNiCo 8	580	5800	100	1250	18.0	2.2	7.3	-0.025	+0.02	860	550
LNGT32	AlNiCo 8	800	8000	100	1250	32.0	4.0	7.3	-0.025	+0.02	860	550
LNGT40		800	8000	110	1380	40.0	5.0	7.3	-0.025	+0.02	860	550
LNGT60	AlNiCo 9	900	9000	110	1380	60.0	7.50	7.3	-0.025	+0.02	860	550
LNGT72	AlNiCo 9	1050	10500	112	1400	72.0	9.00	7.3	-0.025	+0.02	860	550

Sintered AlNiCo
Grade	Br		Hcj		Hcb		(BH)max		Density	Temperature Codfficient % Change °C	Curie TemperatureTc	Remark
Grade	mT	Gs	KA/m	Oe	KA/m	Oe	KJ/m³	MGOe	g/cm³	%/K	°C	Remark
FLN8	520	5200	43	540	40	500	8-10	1.0-1.25	6.8	-0.022	760	760
FLNG12	700	7000	43	540	40	500	12-14	1.5-1.75	7.0	-0.014	810
FLNGT14	570	5700	78	980	76	950	14-16	1.75-2.0	7.1	-0.020	850
FLNGT18	560	5600	90	1130	88	1100	18-22	2.25-2.75	7.2	-0.020	850
FLNG28	1050	10500	47	590	46	580	28-33	3.5-4.15	7.2	-0.016	850	Anisotropy
FLNG34	1100	11000	51	640	50	630	34-38	4.3-4.8	7.2	-0.016	890
FLNGT28	1000	10000	57	710	56	700	28-30	3.5-3.8	7.2	-0.020	850
FLNGT31	780	7800	106	1130	104	1300	33-36	3.9-4.5	7.2	-0.020	850
FLNG33J	650	6500	150	1880	136	1700	31-36	4.15-4.5	7.2	-0.020	850
FLNGT38	800	8000	126	1580	123	1550	38-42	4.75-5.3	7.2	-0.020	850
FLNGT42	880	8800	122	1530	120	1500	42-48	5.3-6.0	7.25	-0.020	850

Conversion Table
Quantity	Unit C.G.S.	Unit S.I.	*(S.I.)/(C.G.S.)ratio
Magnetic flux (Ø)	maxwell	weber, WB	10⁸
Flux Density B	gauss, G	tesla, T=Wb/m²	10⁴
Permeability of space (µo)	unity	henry/meter,H/m	10²/(4π)
Intensity of Magnetisation (J)	e.m.u.=G/(4)	tesla, T=N/Am	10⁴/(4π)
Magnetic field strength (H)	108Oersted, Oe	ampere/meter,A/m	(4π)/10³
Maximum energy product (BHmax)	MGOe	KJ/m³	(4π)/10²