Answer is:
It deforms permanently (without fracture) under the action of external forces.
Answer is:
It undergoes a slow and permanent deformation at constant stress
Answer is:
Heated up to the lower critical temperature and then cooled in still air
Answer is:
Wrought iron
Explanation:
Wrought Iron is the purest form of iron; although it may contain traces of carbon. It is usually made by ‘‘puddling process’’. It is very costly and its use has been almost totally replaced by cheaper steel. However, for some components like chain-links and Crane-hooks wrought iron is still the preferred raw material.
