The graphite in grey irons exists in the form of flakes which act as stress-raisers under tensile loading and consequently grey irons have relatively low tensile strength and ductility. Still grey iron is extensively used in engineering. Why ?

The graphite in grey irons exists in the form of flakes which act as stress-raisers under tensile
loading and consequently grey irons have relatively low tensile strength and ductility. Still grey iron is
extensively used in engineering. Why ?
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1 Answer

Answer :

(a) Cheapness.
(B) Low melting point and high fluidity making it suitable for castings of intricate shape.
(c) Relatively good erosion and corrosion resistance.
(d) High damping capacity, with respect to vibration.
(e) Relatively good mechanical properties under compressive loading.
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