Oct 092012
 

Mechanical propertiesMechanical Properties of a Metal are properties that are associated with the ability of a metal to resist loads. They heavily influence the characteristics of a metal.

The following are some of the important mechanical properties of a metal:

  1. Elasticity
  2. Plasticity
  3. Ductility
  4. Toughness
  5. Malleability
  6. Strength
  7. Stiffness
  8. Creep
  9. Resilience
  10. Hardness

Elasticity:

Whenever an external force is applied on a metal, it deforms. Elasticity is the property by virtue of which a metal regains its original shape when the external force applied on it is removed.

Plasticity:

Plasticity is the property by which a metal retains its deformation permanently, when the external force applied on it is removed.

Examples: forming, forging, hammering

Ductility:

Ductility is the property by which a metal can be drawn into thin wires. It is determined by percentage elongation and percentage reduction in area of a metal.

Toughness:

When a huge external force is applied on a metal, the metal will experience fracture. Toughness is the ability of a metal to resist fracture.

Malleability:

It is the property by which a metal can be rolled into thin sheets. Highly malleable metals (like Mild Steel) are extensively used in making sheet metals.

Strength:

When external forces are applied on a metal, breaking (brittle metal) or yielding (ductile metal) may occur. Strength is the property of a metal by which it resists external force without breaking or yielding.

Stiffness:

When an external force is applied on a metal, it develops an internal resistance. The internal resistance developed per unit area is called stress. Stiffness is the ability of a metal to resist deformation under stress.

Creep:

When a metal is subjected to a constant load (below its yield point), at high temperature, for a prolonged period of time, it undergoes a permanent deformation. This tendency of the metal is called creep.

Resilience:

Resilience is the ability of a metal to absorb energy and resist soft and impact load.

Hardness:

Hardness is the ability of a metal to resist permanent change of shape caused by an external force.

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I am a mechanical engineer with a passion for technical stuff. I am the founder and former editor-in-chief of Mechteacher.com.