The article presents results of comparative A-TIG welding tests involving selected unalloyed and fine-grained steels, as well high-strength steel WELDOX 1300 austenitic stainless AISI 304L. involved the use single ingredient activated fluxes (Cr2O3, TiO2, SiO2, Fe2O3, NaF, AlF3). In cases carbon low-alloy revealed that greatest increase in penetration depth was observed steels which had been de...