Engineering Materials
The hardness is the property of a material due to which it

Can be rolled or hammered into thin sheets
Can cut another metal
Can be drawn into wires
Breaks with little permanent distortion

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Engineering Materials
Ductile cast iron

Contains 1.7 to 3.5% carbon in Free State and is obtained by the slow cooling of molten cast iron
Is produced by annealing process. It is soft, tough and easily machined metal
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
Is also known as chilled cast iron and is obtained by cooling rapidly. It is almost unmachinable

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Engineering Materials
Specify the sequence correctly

Stress relief, recrystallization, grain growth
Grain growth, recrystallization, stress relief
Grain growth, stress relief, recrystallization
Stress relief, grain growth, recrystallization

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