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.
steel. Any of various hard, strong, and flexible alloys of iron and carbon. Often, other metals are added to give the steel a particular property. Chromium and nickel, for example, are added to steel to make it stainless.Steel is widely used in many kinds of tools and as a structural material in building.teel. Any of various hard, strong, and flexible alloys of iron and carbon. Often, other metals are added to give the steel a particular property. Chromium and nickel, for example, are added to steel to make it stainless.