The most commonly used method for determining hardenability is the end quench test developed by Jominy and Boegehold. The details of the test are covered in ASTM A255
In this test a normalized 25 mm diameter and 100 mm length test sample of steel to be evaluated is heated uniformly to its austenitizing temperature. The specimen is then removed from the furnace and placed in the end quench test Apparatus and immediately end quenched by a jet of room temp. water.
After end quenching, longitudinal Flat Surfaces are ground on opposite sides of the test piece as per dimensions . This grinding is very important for correct positioning of the sample in the fixture and also for accurate repeatable and reliable test results.
