What is the Jominy end-quench test?


Quick Answer

The Jominy end-quench test is a test to measure the hardenability of steel. The hardenability of steel is the depth of the steel when it is hardened after heating.

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Full Answer

The Jominy test uses a round steel bar that is heated to transform it into austenite. The bar is then quenched with room temperature water on one end. The bar is then cooled. A flat surface is then rubbed on the bar to measure the hardness of the bar. The hardenability is lower on the quenched end and increases as the distance from the quenched end increases. The results are plotted on a distance/hardenability graph, which can then be compared with other steel specimens. The test was invented by Walter E. Jominy and A. L. Boegehold in 1937 when they were metallurgists at the Research Laboratories Division of General Motors Corporation. In 1944, Jominy received the Albert Sauveur Achievement Award from the American Society of Metals.

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