Iron+and+Steel

=Iron and Steel=

Definitions

 * __Steel__** is one of the strongest materials used in construction, strong in compression and tension. Some of the disanvantages are, rusts, loses strength in extremely high tempetures.


 * __Iron__** is mods to any shape, strong in compression. Some of the disavantages are, weaker than steel in tension, breaks without warning.



5 words, 5 sentences

 * Bed: You have to put the mortar in the bed of the brick, I mean in the face of the brick.
 * Column: One of the principle architectural is the column.
 * Quarry: That quarry produces some of the best quarry products on island.
 * Arris: The shape of a brick is usually like a rectangular, where the faces meet in the arris.
 * Expenditure: A capital expenditure is incurred when a business spends money in future benefits.

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**Wrought iron**
Is commercially pure iron. In contrast to steel, it has a very low carbon content. It is a fibrous material due to the slag inclusions (a normal constituent). This is also what gives it a "grain" resembling wood, which is visible when it is etched or bent to the point of failure. Wrought iron is tough, malleable, ductile and easily welded.




Metals in general have superior eletric and thermal conductivity, high luster and density, and the ability to be deformed under stress without cleaving. I Think, metals are cold material, but is very interesting because they are great thermal and electric conductivity, which mean that they can past heat very well.

//"The old cast iron buildings died out. I'm not really sure whether the new skyscrapers killed them, or the new esthetics //"