Engineering Materials
Steel contains

Alloying elements like chromium, tungsten nickel and copper
80% or more iron
Elements like phosphorus, sulphur and silicon in varying quantities
50% or more iron

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Engineering Materials
Malleable cast iron

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

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