Engineering Materials
Bell metal contains

70% copper and 30% zinc
85 - 92% copper and rest tin with little lead and nickel
90% copper and 10% tin
70 - 75% copper and rest tin

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Engineering Materials
Carbon steel is

Refined from cast iron
Extensively used for making cutting tools
Made by adding carbon in steel
An alloy of iron and carbon with varying quantities of phosphorus and sulphur

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