Engineering Materials
Addition of lead and bismuth to aluminium results in

Improvement of corrosion resistance
Improvement of casting characteristics
One of the best known age and precipitation hardening systems
Improving machinability

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Engineering Materials
A coarse grained steel

Is less tough and has a less tendency to distort during heat treatment
Is less tough and has a greater tendency to distort during heat treatment
Is more ductile and has a greater tendency to distort during heat treatment
Is more ductile and has a less tendency to distort during heat treatment

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