MAGNETIC PERMEABILITY
        μr max        μr (small mag)
Ferromagnetic:    
   Cobalt             60           60
   Nickel             50           50
   Cast iron             90           60
   Silicon iron          7 000        3 500
   Xfmr iron          8 500        3 000
   Very pure iron          8 000        4 000
   Machine steel            450          300
   Mumetal           20 000
   Sendust           20 000
   Supermalloy          100 000
Paramagnetic:    
   Aluminum     1.000 000 65
   Beryllium     1.000 000 79
   MnSO4     1.000 100
   NiCl     1.000 040
Diamagnetic:    
   Bismuth     0.999 998 60
   Paraffin     0.999 999 42
   Silver     0.999 999 81
   Wood     0.999 999 50
Comments and corrections welcome
last update: 03-27-02

 

 

NOTE:

The relative permeability (μr) is dimensionless and must be multiplied by the permeability of free space (μ0 = 4π10-7 H/m) to arrive at the final permeability.
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