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The cool thing about this treasure trove of technical information is that we are able to track what visitors look at – including articles that were posted in the early 2000s.
The Jominy end-quench test is used to measure the hardenability of a steel, which is a measure of the capacity of the steel to harden in depth under a given set of conditions. This article considers the basic concepts of hardenability and the Jominy test.
The heat-treat process-verification articles included here have stood the test of time, and readers continue to show their interest through online viewing.
Hardenability is the ability of steel to partially or completely transform from austenite to some fraction of martensite at a given depth below the surface when cooled under a certain condition. The “gold standard” test for all hardenability results has always been the “Jominy End-Quench Test.”
The Jominy, or end-quench test, determines the capacity of steel to harden under defined heating and cooling parameters. ASTM A255 (Standard Test Methods for Determining Hardenability of Steels) provides the guidelines/procedures for performing the Jominy test.