MECHANICAL PROPERTIES:

• mechanical properties are associated with behaviour of materials subjected to mechanical load. strenth:it is defined as the capacity to resist external load under given conditions.
• modulus of elasticity :the ratio of stress to strain,within the elastic limit,is called modulus of elasticity or yongs modulus. 
• ductility:it is the ability of a material to defrom under tensil load.the property facilitates wire drawing operation.
• malleability:it isthe ability of a material defrom under compressive load.due to this property metals are hammered and rolled into thin sheets.
• toughness:the ability of a material to absorb energy before  fracture is called toughness.
• creep:the slow an progressive deformation of a material with time at constant stress is called creep.