sex key pass >>Metal

Metal

The metal is the general term of the material with the almost following property.

The metal is imaged as a hard thing generally, and there are many things which are really firm when I put it for the meanings such as the scratch hardness.
However, there is the soft thing like an alkali metal / an alkaline-earth metal.

In addition, it may be said that rather it is a characteristic to be easy to process the metal softly (there is ductility) if I stand at the point of view called the ductility.
It processes it with strength, and there is the reason used in large quantities industrially for a good point of the balance of the easiness of.

Furthermore, it characterizes it that a free electron exists among the combination as for the metal even if I look scientifically.
It is a characteristic that the form of the free electron moves about the whole metal materials like liquid according to the reputation freely.
Therefore, I can arrest metal with "the thing which seem to be soft wet clay" which electronic, consisted of it moving like an atom and the liquid which do not change a position like a solid freely.
In addition, the free electron such as this liquid becomes the cause of the metallic luster.

The iron basis alloy is called iron and steel for a structure member and plays an active part by the abundant productivity in various fields.
However, the activity of the iron basis alloy is not limited to a structure member, and low thermal expansion materials and permanent magnet, diverge into many branches.
Unlike ceramics and others nonferrous metal, strength amplification ability by the heat-treatment is high, and it is used many for a tool and a die processing iron even if I make it a structure member.
In addition, I am heat-resistant, and corrosion resistance is alloy system having high variable breadth.
But I add the element of the another kind unlike these iron in itself and am rebeared to the metal which is totally different from iron in itself by putting the heat-treatment that I accepted for it.