Fracture Initiation caused by raw material non metallic elements and compounds
Inclusion Rating/Raw Material Cleanliness:
Metals contain non metallic elements and compounds causing reduction in strength and many other issues including effecting the response to heat treatment of the metal. These non metallics refered to as inclusions are in some cases an aid toenhancing the machinability of the component. However, in most cases these non metallics reduce the engineering properties of the metal and contaminate the metal with non desirable constituents. We are able to prepare the specimens per standards and conduct cleanliness ratings or "dirt" count and rate the material with a simple table. In steels the inclusions are classified into 4 main groups listed as silicates, aluminas, sulfides, and oxides.
