 | Glossary Terms beginning with J | | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | | | | J Prep (Single/Double) | | Preparation for welding. | | | Jominy Test | | A test used to assess the hardenability of a steel. A standard Jominy specimen is 25mm in diameter and 100mm long with a flanged end. The specimen is heated to an austenitic condition and then end-quenched using a standardised water jet. When cool, a flat, 0.4mm deep, is ground along the length of the bar and hardness measurements made along the flat. The hardness results are then plotted against distance from the quenched end to give a Jominy hardenability curve for the steel. | | | Joule | | A joule (J) is a unit of energy, including work and quantity of heat. It is the work done when the point of application of a force of 1 Newton (N) is displaced through a distance of 1 metre (m) in the direction of the force. |
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