Mechanical Properties:-
Strength: It is the ability of a material to resist the externally applied forces without breaking or yielding. The internal resistance offered by a part to an externally applied force is called stress.
Stiffness: It is the ability of a material to resist deformation under stress. The modulus of elasticity is the measure of stiffness.
Elasticity: It is the property of a material to regain its original shape after deformation when the external forces are removed. This property is desirable for materials used in tools and machines.It may be noted that steel is more elastic than rubber.
Plasticity: It is property of a material which retains the deformation produced under load permanently. This property of the material is necessary for forgings, in stamping images on coins and in ornamental work.
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