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.
If you've ever seen steel, a popular material for construction and consumer products, it certainly looks and feels like a hard metal. But looks can be deceiving. In fact, the difference between metal and steel is highly overlooked in a world that often thinks of steel as a type of metal.Even in a professional capacity, these terms are used together. Steel is commonly used as a builÂ­ding material and metal buildings, as they are referred to, are often made of steel.ome common metals are titanium, copper and nickel. Steel, on the other hand, is an alloy of iron with varying amounts of carbon content (from 0.5 to 1.5 percent) [source: Merriam-Webster ]. Steel, being an alloy and therefore not a pure element, is not technically a metal but a variation on one instead.