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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 1C above a start point of 20C.

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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