Saturation curves for common soft magnetic materials

As I mentioned in the previous article, I found it difficult to find saturation curves for common soft magnetic materials by searching the Internet. To help, I decided to share the data I have accumulated over a 20 year period. Here is a link to the data:

Values are  listed in text format so you can copy them and paste them into applications. The data are from a variety of sources, and I made some effort to ensure consistency. Nonetheless, Field Precision makes no claims about the accuracy of the values and accepts no responsibility for applications of the data. You are welcome to use them as is. If you have better values or find an error, please contact us a

The following materials are included

Alloy 4750                         Monimax non-oriented
Armco                              Monimax oriented                        
Carbon steel forging annealed      MuMetal                                 
Cast iron                          Nickel                                  
Cast steel                         Nickel pure annealed                    
Cobalt                             Nodular cast iron                       
Cold-drawn carbon steel annealed   Permalloy 65 oriented                   
Cold-rolled low-carbon steel       Permalloy 78                            
Deltamax oriented                  Perminvar                               
Ferrite (TDKPE22)                  Powdered iron sintered annealed         
Ferrite (TDKPE90)                  Pure iron                               
Gray iron                          Pure iron annealed                      
Hot-rolled low-carbon steel        Sheet steel                             
Ingot iron annealed                Silicon steel                           
Iron1018                           Silicon strip 3% oriented               
M14                                Sinimax                                 
M19                                Soft iron                               
M22                                Soft ferrite (FeNiZnV)                  
M27                                Stainless steel 416 annealed            
M43                                Steel 50H470                            
M36                                Steel 1008                              
M50                                Steel 1010                              
Magnet steel                       Steel 1018                              
Magnetite                          Steel 1020                              
Malleable iron casting             Steel 1030                              
MetGlas 2605HB1M                   Steel casting                           
MetGlas 2605SA1                    Supermalloy                             
Moly Permalloy                     Supermendur                             
Monel annealed                     Temperature compensation alloy (30%NiFe)
                                   Tungsten steel                          
                                   Vanadium Permendur

For the soft materials, the value of relative magnetic permeability (μr) is defined as

μr = B/B0 = B/(μ0*H)   [1]

where the total magnetic flux density B is in tesla and the magnetic field H is in A/m. The quantity B0 is the applied magnetic flux density and has units of tesla. Magnetic materials saturate at high values of B. The maximum contribution that a material can make to the total flux density occurs when all domains are completely aligned. The contribution is called the saturation flux density Bs. At higher fields, the total flux density is the sum of the peak material contribution and the applied flux density:

B = B0 + Bs.   [2]

In this limit, the relative permeability is

μr = B/(BBs).   [3]

At high field, Eq. 3 implies that the saturation flux density is given by

Bs = BB/μr. [4]

Some of the tables contained high enough values of B that is was possible to identify a consistent value of Bs from Eq. [4]. For these cases, I used Eq. 3 to extend the table to a standard value of B = 10.0 tesla to aid in the convergence of nonlinear numerical solutions.

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