Iron+and+Steel


 * Iron is a metallic material construction. It oxidizes with facility in presence of oxygen and humidity.**

Steel and iron are used as skeleton for the construction of large structures as buildings, roads, railways, bridges, among others, with the support of concrete for to reinforce the structure.**
 * Steel is an alloy composed mostly of iron and a little portion of carbon. Nowadays, this construction material is ** **one of the most common materials in the world, and it is used as important component in buildings,** **infrastructure, tools, ships, automobiles, machines and weapons.


 * For more information, go to: **

@http://en.wikipedia.org/wiki/Steel
 * [[image:lupa-buscar.jpg align="left"]]Wikipedia:** []