Physical Properties of Metals: Density, Color, Size and shape, Specific Gravity, Porosity

 Physical Properties of Metals

The important physical properties of the metals are density, color, size and shape (dimensions), specific gravity, porosity, luster etc. Some of them are defined as under.


1. Density

Mass per unit volume is called as density. In metric system its unit is kg/mm3. Because of very low density, aluminium and magnesium are preferred in aeronautic and transportation applications.

2. Color

It deals the quality of light reflected from the surface of metal.

3. Size and shape

Dimensions of any metal reflect the size and shape of the material. Length, width, height, depth, curvature diameter etc. determines the size. Shape specifies the rectangular, square, circular or any other section.

4. Specific Gravity

Specific gravity of any metal is the ratio of the mass of a given volume of the metal to  the mass of the same volume of water at a specified temperature.

5. Porosity

A material is called as porous or permeable if it has pores within it.


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