Magnetic Materials - Specification Table

Please note that the table below gives only one set of figures for each material. These are based on the performance of the most commonly used grades. However, each type of material has a range of grades available. Further performance figures for these grades can be provided on request.

Key:
(BH) Max - Indicates the highest energy obtained when material is working in its optimum environment.

Coercive Force - This is the amount of 'reverse' energy required to cancel out the magnetism of an energised magnet.

Remanence, Br - This figure represents the flux value present in a 'perfect' closed magnetic circuit once the material has been energised.

Temperature coefficient, Br - Shows the reversible loss of performance (in percentage figures) for each increase in temperature of 1°C above a start point of 20°C.

Material Classification	Isotropic Ferrite	Anisotropic Ferrite	Neodymium	Samarium Cobalt	Alcomax
A1M GRADE	Grade 1	Grade 2	Grade 3	Grade 4	Grade 5
DIN	8/22	26/26	260/90	190/80	43/5
Br (mT)	230	360	1240	990	1270
Br (GAUSS)	2300	3600	12400	9900	12700
BHC (KA/m)	140	230	855	600	50
BHC (OERSTED)	1650	3000	10600	7600	620
IHC (KA/m)	210	250	900	790	51
IHC (OERSTED)	2700	3200	11000	9900	633
BH max (Kj/M?	8	27	260	195	41
BH max (MGO)	1.1	3.4	33.4	25	5.1
MAGNETISING FORCE (KA/m)	600	800	2500	3500	230
MAGNETISING FORCE (OERSTED)	7500	10000	30500	43700	2900
MAX WORKING TEMP °C	250	250	100	300	550
REV. TEMP COEFF OF Br % °C	-0.2	-0.2	-0.11	-0.032	-0.02
DENSITY (gms/cc)	4.8	4.9	7.4	8.4	7.3
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