Question

Addition of Vanadium to Steel results in improvement of
1) fatigue strength
2) heat treatability by quenching
3) resistance to oxidation at elevated temperature
4) hardenability

Answer 1

Answer is 4

hardenability

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Answer 2

Addition of Vanadium to Steel results in improvement of 1) fatigue strength.

To obtain fine grain structure in the tool steel Vanadium is used.

Even if less than 0.2% is added to the low and the medium carbon steels, it remarkably increases the tensile strength and the elastic limit without ductility loss.