A .   Contains 1.7 to 3.5% carbon in Free State and is obtained by the slow cooling of molten cast iron
B .   Is also known as chilled cast iron and is obtained by cooling rapidly. It is almost unmachinable
C .   Is produced by annealing process. It is soft, tough and easily machined metal
D .   Is produced by small additions of magnesium (or creium) in the ladle. Graphite is in nodular or spheroidal form and is well dispersed throughout the material
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