Jominy test

The Jominy test is a method used by engineers to measure how hard a metal, especially steel, becomes after being cooled quickly from a high temperature. A small steel sample is heated and then one end is cooled rapidly with water. The test then measures the hardness at various distances from the cooled end, revealing how different cooling rates affect the metal’s strength and ductility. This information helps determine the best cooling process during manufacturing to achieve desired material properties for specific uses.