In this research work, procedure for certification process of dissimilar welding between austenitic stainless steel S316 with structural steel grade 300NZS according EN 15614 standard was explained. Shielded metal arc welding process (SMAW) was used. Welding was performed in PA position with EIS 309 Mo electrode. Qualification test has to confirm that the preliminary welding procedure fulfil quality requirement, and welded joint will satisfy the exploitation conditions. The following investigations were conducted to welded test plate; Visual testing (VT) has to show existence of surface defects in the welded joints. Next step was radiographic testing (RT) in order to check eventually appearing of volumetric defects inside the weld. Finally the plate was cut for mechanical testing. All conducted tests fulfilled requirements except one probe of bend test. Because of that qualification procedure was not successful, and it was completely repeated after two weeks. The repeated welding procedure specification (WPS) was qualified.