Stahlinstitut VDEh https://vdeh.de/en/standardisation/stahl-eisen-blatter/stahl-eisen-prufblatter/sep-1681/ – 11.08.2026

SEP 1681

Guidelines for pre­par­a­tion, exe­cu­tion and eval­u­ation of dilato­metric trans­form­a­tion tests on iron alloys,

Dilato­metric testing allows to trace the phase trans­form­a­tions in ferrous alloys. This Stahl-Eisen test spe­cific­a­tion (SEP) contains guidelines for the pre­par­a­tion, exe­cu­tion and eval­u­ation of dilato­metric tests for ferrous alloys.

Described are taking of samples, the fab­ric­a­tion of dilato­meter spe­ci­mens and the welding of ther­moele­ments. Indic­a­tions for the exe­cu­tions contain the mounting of spe­ci­mens, furnace atmo­sphere, deform­a­tion of the spe­ci­mens and data recording, as well as regular checks of the equip­ment. The eval­u­ation of results and the doc­u­ment­a­tion is demon­strated with figures.

Compared to the 2^nd edition the fol­lowing sig­ni­ficant changes are executed: The contents were adapted and written more pre­cisely. Atten­tion was paid to a clear present­a­tion, e.g. for form­a­tion.

3^rd edition January 2025