What is the breif classification of engineering materials internationaly?

CLASSIFICATION OF MATERIALSSolid materials have been grouped in to three basic classifications

1)METALS

2)CERAMICS

3)P0LYMERS

this scheme is primarily based on chemical make up and atomic structure of atoms

There are also some intermediates .In addition there are COMPOSITES

Which are the combination of two or more than two elements

Another classification is