Hardendability of steel is a measure of

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

Correct answer: the depth to which required hardening is obtained when it is austenitized and then quenched

Solution

Hardendability specifically refers to how deeply a steel can be hardened through the process of austenitizing followed by quenching, indicating the effectiveness of the heat treatment in achieving hardness throughout the material.

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