Iron is the basic ingredient (usually 95% plus) of every alloy of steel, the most basic construction material there is for buildings, cars, appliances, and what-have-you.
Because iron gives a strong base.
Cast iron.
It is found in some matrials
i think wood iron metal and things like that...not sure though
iron is used for building things! : )
Granite is often used as a building material.
Building can be done with a variety of materials. These include stone, brick, wood, iron, as well as a number of tools.
....
Mortar is used to bind building materials together when building a building.
steel, copper and iron are the materials that are used in boilers.
used for tools and building materials
These are used for industrial minerals and building materials.