Engineering Materials
Beryllium bronze contains

97.75% copper and 2.25% beryllium
99% copper and 1% beryllium
60% copper and 40% beryllium
80% copper and 20% beryllium

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Engineering Materials
Steel contains

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

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Engineering Materials
Amorphous material is one

In which atoms align themselves in a geometric pattern upon solidification
In which there is no definite atomic structure and atoms exist in a random pattern just as in a liquid
Which is not attacked by phosphorous
Which emits fumes on melting

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