81.
Phosphor bronze contains

82.
A material is known as allotropic or polymorphic if it

83.
Sulphur in cast iron

86.
The alloying element which reduces the formation of iron sulphide in steel is

87.
In low carbon steels, ________ raises the yield point and improves the resistance to atmospheric corrosion.

88.
Permalloy is a

89.
Process of Austempering results in

90.
Which is false statement about tempering? Tempering is done to

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