SEP 1927
Ultrasonic Immersion Testing Method for Determining the Macroscopic Cleanliness Rate of Rolled or Forged Steel Bars.
This Stahl-Eisen test specification (SEP) applies to the automated ultrasonic immersion testing of appropriately prepared rolled or forged samples of steel for long products.
Described are agreements, personnel qualification, preparation of test specimens, the test equipment and its inspection, adjustment, sensitivity classes, test volume, test procedure, assessment and test report.
An example assessment is included.
Important change: Sensitivity setting shall be carried out no more with a reference block (calibration block), but with a sample of the test job.
3rd edition December 2025