The GATE Grind

GATE 2022 MT – Question 31

Physical Metallurgy · Heat treatment and recrystallization · 1 mark · Multiple select

Identify the correct statement(s) with respect to the role of nickel as an alloying element in steels.

  1. It increases the $M_s$ temperature
  2. It is an austenite stabiliser
  3. It decreases the $M_s$ temperature
  4. It is a carbide former

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Show answer and explanation

Correct answer: (B) It is an austenite stabiliser; (C) It decreases the $M_s$ temperature

Explanation

Nickel stabilizes austenite and depresses the martensite-start temperature. It is not a strong carbide former, and it does not raise Ms.

Thus **B,C**.