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Hard Ferrite Magnets

The elements of Ferrite magnets are ferric oxide, barium oxide and strontium oxide, etc. Ferrite magnets have higher coercive force, higher resistance to be demagnetized and higher corrosion resistance than other non-rare earth permanent magnets. The biggest advantages of such magnets are their low price.
Ferrite magnets are widely used in motors, speakers, microwave devices, electronics, machines, instruments, meters, toys and crafts, etc.

TYPICAL MAGNETIC PERFORMANCE OF SINTERED FERRITE MAGNETS

Grade	Br		HcB		HcJ		(BH)max
Grade	mT	KG	KA/m	KOe	KA/m	KOe	Kj/m3	MGOe
Y8T	200~235	2.00~2.35	125~160	1.57~2.01	210~280	2.64~3.51	6.50~9.50	0.8~1.2
Y22H	310~360	3.10~3.60	220~250	2.77~3.14	280~320	3.51~4.02	20.0~24.0	2.5~3.0
Y25	360~400	3.60~4.00	135~170	1.70~2.14	140~200	1.76~2.51	22.5~28.0	2.8~3.5
Y26H-1	360~390	3.60~3.90	220~250	2.51~3.14	225~255	2.83~3.20	23.0~28.0	2.9~3.5
Y26H-2	360~380	3.60~3.80	263~288	3.30~3.62	318~350	3.99~4.40	24.0~28.0	3.0~3.5
Y27H	350~380	3.50~3.80	225~240	2.83~3.01	235~260	2.95~3.27	25.0~29.0	3.1~3.6
Y28	370~400	3.70~4.00	175~210	2.20~3.64	180~220	2.26~2.76	26.0~30.0	3.3~3.8
Y28H-1	380~400	3.80~4.00	240~260	3.01~3.27	250~280	3.14~3.52	27.0~30.0	3.3~3.8
Y28H-2	360~380	3.60~3.80	271~295	3.40~3.70	382~405	4.80~5.08	26.0~32.5	3.4~3.8
Y30H-1	380~400	3.80~4.00	230~275	2.89~3.46	235~290	2.95~3.64	27.0~32.5	3.3~3.8
Y30H-2	395~415	3.95~4.15	275~300	3.45~3.77	310~335	3.89~4.20	27.0~32.0	3.4~4.1
Y32	400~420	4.00~4.20	160~190	2.01~2.37	165~195	2.07~2.45	30.0~33.5	3.4~4.0
Y32H-1	400~420	4.00~4.20	190~230	2.39~2.89	230~250	2.89~3.14	31.5~35.0	3.9~4.4
Y32H-2	400~440	4.00~4.40	224~240	2.80~3.01	230~250	2.89~3.14	31.0~34.0	3.9~4.3
Y33	410~430	4.10~4.30	220~250	2.76~3.14	225~255	2.83~3.20	31.5~35.0	3 .9~4.4
Y33H	410~430	4.10~4.30	250~270	3.14~3.39	250~275	3.14~3.45	31.5~35.0	3 .9~4.4
Y34	420~440	4.20~4.40	200~230	2.51~2.89	205~235	2.57~2.95	32.5~36.0	4.1~4.4
Y35	430~450	4.30~4.50	215~239	2.70~3.00	217~241	2.73~3.03	33.1~38.2	4 .1~4.8
Y36	430~450	4.30~4.50	247~271	3.10~3.40	250~274	3.14~3.44	35.1~38.3	4 .4~4.8
Y38	440~460	4.40~4.60	285~305	3.58~3.83	294~310	3.69~3.89	36.6~40.6	4 .6~5.1
Y40	440~460	4.40~4.60	330~354	4.15~4.45	340~360	4.27~4.52	37.6~41.8	4 .7~5.2

USA standard

Grade	Br		HcB		HcJ		(BH)max
Grade	mT	KG	KA/m	KOe	KA/e	KOe	kj/m3	MGOe
C1	230	2.3	148	1.86	258	3.5	8.36	1.05
C5	380	3.8	191	2.4	199	2.5	27	3.4
C7	340	3.4	258	3.23	318	4	21.9	2.75
C8(=C8A)	385	3.85	235	2.95	242	3.05	27.8	3.5
C8B	420	4.2	232	2.913	236	2.96	32.8	4.12
C9	380	3.8	280	3.516	320	4.01	26.4	3.32
C10	400	4	288	3.617	280	3.51	30.4	3.82
C11	430	4.3	200	2.512	204	2.56	34.4	4.32

Remark:
	Density: 4.5¡ª5.0G/cm3 Tc≥450 ℃ The best range of working temperature: -40 ¡ª +85 ℃ α(Br)=£0.2%/ ℃ range from 0 ℃ to 100 ℃. α(Hcj)=0.2£0.5%/ ℃ range from 0 ℃ to 100 ℃.