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SNCM 440,  N2 quenched in a vacuum furnace.


  A


Photo B: 1 -  C / alloying element- rich area;  M + L. B.


  2 - C / alloying element- poor area. Non-Martensitic products formed because of poor hardenability.


  B  C
  D
  E
  F
 
 

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