Steel Bar Ultrasonic Testing

https://www.bkneddy.com/ultrasonic-testing-equipment/steel-bar-testing/

The steel bar is rolled by a rolling mill and produces both surface defects and internal defects during the rolling process. The internal defect is that the original defects of the steel chain or billet are extended during the rolling process. These defects are mainly concentrated in the central part of the steel rod. The forms mainly include slag inclusion, shrinkage, delamination, and looseness.