When you import material properties, one material is created for each of the metallurgical phases austenite, ferrite, pearlite, bainite, and martensite. These materials can then be used as Phase Material in the
Metallurgical Phase nodes in the interfaces. In addition to material properties for the individual metallurgical phases, effective material properties that represent a compound material behavior are collected and imported into a separate material. This material can be merged into, for example, a created compound material, see
Using Effective Material Properties.