How is hardness referenced by the Jominy end-quench test?
What we have at the end of the test is a cylinder of steel that is harder at the bottom (where it was in the stream of water), not quite as hard up the side (where it was still under water, but not near the bottom), and even less hard farther up the side at the level of the water in the Jominy test tank. As we move farther and farther up where the bar cooled in air, it will be less and less hard. We’ll clean up our sample with a little surface finishing, then move on to testing. The hardness is determined by using the standard Rockwell hardness tests. They are performed along the length of the bar, and are correlated for ease of comparison.
