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Engineering Materials

Engineering Materials
Age hardening is related to

Duralumin
Brass
Silver
Copper

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Engineering Materials
Sulphur in cast iron

Make the iron white and hard
Aids fusibility and fluidity
Increases hardness and brittleness
Makes the iron soft and easily machinable

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Engineering Materials
Bell metal contains

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

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Engineering Materials
Induction hardening is the process of

Increasing hardness throughout
Hardening surface of work-piece to obtain hard and wear resistant surface
Inducing hardness by continuous process
Heating and cooling rapidly

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Engineering Materials
Brass contains

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

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Engineering Materials
Large forgings, crank shafts, axles normally contain carbon up to

0.20 to 0.45%
0.55 to 1.0%
0.05 to 0.20%
0.45 to 0.55%

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