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Mechanical Engineering
MEDIUM
ENGLISH
Mechanical Engineering
Ductile cast iron___________________?
A
contains 1.7 to 3.5% carbon in free state and is obtained by the slow cooling of molten cast iron
Option A
B
is also known as chilled cast iron and is obtained by cooling rapidly. It is almost unmachinable
Option B
C
is produced by annealing process. It is soft, tough and easily machined metal
Option C
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
Correct answer
Correct answer: D
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