Malleable cast iron is produced
A
By adding magnesium to molten cast iron
B
By quick cooling of molten cast iron
C
From white cast iron by annealing process
D
None of these
Correct Answer: From white cast iron by annealing process
Malleable iron is obtained by the heat treatment of white iron so the hard iron carbide structure of ledeburite is converted to a matrix of ferrite or pearlite and graphite is precipitated within the iron.This form of graphite is sometimes referred to as tempered carbon.
