ISRO Mechanical & Aerospace 2011 - Question 33

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Tungsten in High Speed Steel provides

  • A. Hot hardness
  • B. Toughness
  • C. Wear resistance
  • D. Sharp cutting edge

Answer: A. Hot hardness

Explanation: Tungsten (and Molybdenum) forms stable carbides that retain hardness at high temperatures (red hardness).

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