In the Late Classic Period Yaxchilan was one of the most powerful Maya cities along the course of the Usumacinta, with Piedras Negras as its major rival. Architectural styles in subordinate sites in the Usumacinta region demonstrate clear differences that mark a clear boundary between the two kingdoms.
Answered by The Community. Making the world better, one answer at a time. Steel is not usually considered a composite, as it is macroscopically homogeneous. However, some steel types, including classical iron-carbon steel, can be considered as metal-matrix composites, as they contain a second phase... sometimes.
No, steel is not an element. It is actually considered an alloy, and the elements iron and carbon are the basic ingredients for making steel. Certainly other elements can be a â¦ dded for different reasons, like chromium for the production of stainless steel. But it is iron and carbon that make steel.