The conference “Numerical Analysis of Weldability,” held at Schloss Seggau since 1991, has, in recent years, developed into the world’s leading conference in the field of mathematical modeling of processes in welding technology and places the Austrian industry at the center of attention for three days. This seminar is based on our activities at the International Institute of Welding (IIW), the global association of welding societies. 
In September 2025, the 14th conference in this series took place, attended by numerous top scientists from 15 countries. The results of these conferences are collected and published in the series “Mathematical Modelling of Weld Phenomena,” of which 13 volumes have been released so far.
As part of this conference, since 2001 the IIW Kenneth Easterling Award, endowed by the Institute of Materials Science, Joining and Forming Technology at TU Graz, has been awarded, recognizing outstanding achievements in the field of “Mathematical Modelling of Weld Phenomena”.