Jominyendquenchtest
The Jominy end-quench test, commonly referred to as the Jominy test, is a metallurgical procedure used to determine the hardenability of a steel alloy. Hardenability describes the depth to which a steel can harden under a given quenching condition, as distinct from the surface hardness itself. The test yields a Jominy curve, which plots hardness against distance from the quenched end and allows comparison of how different steels respond to quenching.
Procedure: A standardized cylindrical specimen is heated into the austenitic range (typically around 850–950 °C) and
Interpretation and use: Hardenability is inferred from the curve rather than surface hardness alone. The Jominy
Standards and limitations: The method is defined in standards such as ASTM A255/A255M (Standard Test Methods