The answer is no.
These are different types of cast iron with distinctions in their composition,
microstructure, mechanical properties, manufacturing processes, and applications.
Malleable cast iron
contains
irregular graphite inclusions, whereas ductile cast iron, also known as spheroidal or nodular cast iron,
features
graphite in the form of nodules or spheroids.
Regarding machinability, malleable and ductile cast iron have comparable ratings.
However, malleable cast
iron
is
generally considered somewhat easier to machine when compared to ductile cast iron, although this can vary
depending on specific cast iron grades.