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Q: Mild steel is designed by :
  • A. fracture
  • B. elastic deformation
  • C. fatigue
  • D. plastic deformation
Correct Answer: Option D - Mild steel is designed by plastic deformation. Physical properties of mild steel– • High tensile strength • High impact strength • Good durability and weldability • A magnetic metal due to its ferrite content • Good malleability with cold-forming possibilities. Plasticity– It is the property of a material of being permanently deformed by a force without breaking. Thus if a material does not return to the original shape, it is said to be plastic, within certain load limits, mild steel, copper, polythene are example of elastic materials.
D. Mild steel is designed by plastic deformation. Physical properties of mild steel– • High tensile strength • High impact strength • Good durability and weldability • A magnetic metal due to its ferrite content • Good malleability with cold-forming possibilities. Plasticity– It is the property of a material of being permanently deformed by a force without breaking. Thus if a material does not return to the original shape, it is said to be plastic, within certain load limits, mild steel, copper, polythene are example of elastic materials.

Explanations:

Mild steel is designed by plastic deformation. Physical properties of mild steel– • High tensile strength • High impact strength • Good durability and weldability • A magnetic metal due to its ferrite content • Good malleability with cold-forming possibilities. Plasticity– It is the property of a material of being permanently deformed by a force without breaking. Thus if a material does not return to the original shape, it is said to be plastic, within certain load limits, mild steel, copper, polythene are example of elastic materials.