Which of the following metals, when added to steel, makes it suitable for cutting purposes by maintaining the 'cutting edge' of the blade?
A
Lithium
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B
Vanadium
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C
Managanese
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D
Potassium
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Solution
The correct option is D Vanadium Vanadium increases strength, hardness and high temperature stability of steel so it is used in steel which is used for cutting purposes.