SEP 1220-2
Testing and Documentation Guideline for the Joinability of thin sheet of steel – Part 2: Resistance Spot Welding.
The test methods specified in this Stahl-Eisen test specification (SEP) describe the procedure to determine the suitability of automotive steel sheets for joining via the process of resistance spot welding.
Described are testing scope and conditions, determination of quality limits, destructive and non-destructive testing, and documentation of results. Example diagrams are given for testing and evaluation of results.
2nd edition November 2024