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Magnetic Separtor

Specialized casting techniques are used to achieve the unique crystalline grain orientation found in the Alnico 5 and 8 grades. These anisotropic grades are designed to produce high magnetic output in a specified direction. Orientation is achieved during heat treatment, by cooling the casting from 2000?F at a controlled rate within a magnetic field which conforms to the preferred direction of magnetization. Alnico 5 and Alnico 8 are anisotropic and exhibit a preferred direction of orientation.

Magnetic orientation should be specified on your drawing when you send an order to us. Cast Alnico 5 is the most commonly used of all the cast Alnicos. It combines high inductions with a high energy product of 5 MGOe or more and is used extensively in rotating machinery, communications, meters and instruments, sensing devices and holding applications. The higher resistance to demagnetization (coercive force) of Alnico 8, cobalt content to 35%, allows this material to function well for short lengths or for length to diameter ratios of less than 2 to 1.

Sintered Alnico materials offer slightly lower magnetic properties but better mechanical characteristics than the cast Alnico materials. Sintered Alnico magnets are most suitable in small sizes (less than 1 oz.). In this process, the desired mix of metal powders is pressed to shape and size in a die, then sintered at 2300?F in a hydrogen atmosphere. The sintering process is well suited to large volume production, and results in parts which are structurally stronger than cast magnets. Relatively close tolerances can be achieved without grinding.

Typical Magnetic Performance for Cast Alnico

Grade	Br		Hc		(BH)max		Curie Temp	Work Temp	US standard
Grade	mT	Gs	KA/m	Oe	KJ/m3	MGOe	°C	°C	MMPA Equivalent
*LN9	680	6800	30	380	9.0	1.13	810	450	Alnico 3
*LN10	650	6500	42	530	10.0	1.20	810	450	Alnico 3
*LNG12	720	7200	45	500	12.4	1.55	810	450	Alnico 2
*LNG13	700	7000	50	620	13.0	1.60	810	450	Alnico 2
LNG16	800	8000	53	660	16.0	2.00	850	450	Alnico 4
LNG34	1180	11800	44	550	35.0	4.30	860	525	Alnico 5C
LNG37	1200	12000	48	600	37.0	4.65	860	525	Alnico 5
LNG40	1250	12500	48	600	40.0	5.00	860	525
LNG44	1250	12500	52	650	44.0	5.50	860	525
LNG52	1300	13000	56	700	52.0	6.50	860	525	Alnico 5 DG
LNG60	1350	13500	59	740	60.0	7.50	860	525	Alnico 5~7
*LNGT18	580	5800	100	1250	18.0	2.20	860	550	Alnico 8
LNGT28	1000	10000	58	720	28.0	3.50	860	525	Alnico 6
LNGT32	800	8000	100	1250	32.0	4.00	860	550	Alnico 8
LNGT38	820	8200	110	1380	38.0	4.75	860	550
LNGT44	880	8800	120	1500	44.0	5.50	860	550
LNGT60	900	9000	110	1380	60.0	7.50	860	550
LNGT72	1050	10500	112	1400	72.0	9.00	860	550	Alnico 9
LNGT36J	700	7000	140	1750	36.0	4.50	860	550	Alnico 8 HC

Typical Magnetic Performance for Sintered Alnico

Grade	Br		Hc		(BH)max		D	Curie Temp	US standard
	mT	Gs	KA/m	Oe	KJ/m3	MGOe	g/cm3	°C	MMPA Equivalent
	Min Max		Min Max		Min Max		g/cm3	°C	MMPA Equivalent
*FLN8	520 580	5.2 5.8	43 47	540 590	8 10	1.00 1.25	6.8	760	Alnico 3
*FLNG12	700 780	7.0 7.8	40 50	540 650	12 14	1.50 1.75	7.0	810	Alnico 2
*FLNGT14	570 630	5.7 6.3	76 86	980 1100	14 16	1.75 2.00	7.1	850	Alnico 8
*FLNGT18	560 620	5.6 6.2	88 100	1130 1280	18 22	2.25 2.75	7.2	850	Alnico 8
FLNG28	1050 1100	10.5 11.0	46 50	590 640	28 33	3.50 4.15	7.2	850	Alnico 5
FLNG34	1100 1180	11.0 11.8	50 54	640 690	34 38	4.30 4.80	7.2	890	Alnico 5
FLNGT28	1000 1050	10 10.5	56 61	710 770	28 30	3.50 3.80	7.2	850	Alnico 6
FLNGT31	780 830	7.8 8.3	104 115	1130 1480	31 36	3.90 4.50	7.2	850	Alnico6
FLNGT33	650 680	6.5 6.8	136 143	1880 2000	33 36	4.15 4.50	7.2	850	Alnico8
FLNGT38	800 850	8.0 8.5	123 129	1580 1660	38 42	4.75 5.30	7.2	850	Alnico 8
FLNGT42	880 920	8.8 9.2	120 131	1530 1680	42 48	5.30 6.00	7.2	850	Alnico 8

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