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.
The material we call steel is in fact an alloy, a mixture of different metals. The element iron (symbol Fe) makes up a large percentage of all steels, generally composing more than 75 percent of the mix by percent of total mass.ilicon (Electrical) Steel. This steel is used in motors and generators and has a composition of about 0.6 to 5 percent silicon (Si), with one specific steel made of 0.4 percent carbon, 2 percent silicon, and 97.6 percent iron.