nickel
chromium
copper
magnesium
by adding magnesium to molten cast iron
by quick cooling of molten cast iron
from white cast iron by annealing process
none of these
white cast iron
nodular cast iron
malleable cast iron
alloy cast iron
When elements like nickel, chromium, copper and molybdenum are added to the molten cast iron, it produces alloy cast iron.
hardness
ductility and strength in tension
corrosion resistance
creep strength
silicon
Sulphur
Manganese
Phosphorus