Iron+&+Steel



Iron is a really strong material that is use to construct buildings and structures like bridges. It is a cumbersome and costly construction material. As a weakness, iron is weaker than steel in tension; breaks without warning.

Steel is a construct material too. It's still strongest than iron and more resistent. It's composed of Iron and a touch of carbon. The best property of this material is that it is strong in comprension and tension. On the other hand, as a weakness, the steel loses strength in extremely high temperatures.

=** Wrought Iron **=


 * 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.

Examples of items that used to be produced from wrought iron include: rivets, chains, railway couplings, ater and steam pipes, raw material for manufacturing of steel, nuts, bolts, horseshoes, handrails, straps for timber roof trusses, boiler tubes, and ornamental ironwork.

**Do you think metals are "cold" materials?** Yes, I think metals are cold materials because even when we have a cold climate, touching metals you can feel cold. The color also gives you a feeling of cold.

= Week 6 Activity! =

5 Words / 5 Sentenses

media type="file" key="Stretcher face.wav" media type="file" key="tension.wav" media type="file" key="fused.wav" media type="file" key="rubble.wav" media type="file" key="compression.wav"
 * Stretcher Face:** All the front of the house is decorated with bricks in order of the stretcher face to outside.
 * Tension:** steel is one of strongest material used in construction, strong in compression and tension.
 * Fused:** iron and steel can be fused to shape them and give them different ways.
 * Rubble:** it's really important after a construction is finished, to pick up the rubbles around the place.
 * Compression:** steel is a very resistent material but if you compress it too hard, it could breaks.