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GATE2019 ME-2: 14

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Hardenability of steel is a measure of

  1. the ability to harden when it is cold worked
  2. the maximum hardness that can be obtained when it is austenitized and then quenched
  3. the depth to which required hardening is obtained when it is austenitized and then quenched
  4. the ability to retain its hardness when it is heated to elevated temperatures
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