Engineering Materials
Grey 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. I is soft, tough and easily machined metal
Is produced by small additions o magnesium (or cerium) in the ladle Graphite is in nodular or spheroidal form and is well dispersed throughout the material
Is also known as chilled cast iron is obtained by cooling rapidly. It is almost unmachinable

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Engineering Materials
Inconel contains

65% nickel, 15% chromium and 20% iron
80% nickel and 20% chromium
68% nickel, 29% copper and 3% other constituents
80% nickel, 14% chromium and 6% iron

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