The paper presents the research on the microstructure and mechanical properties of a pipe made of 16Mo3 steel, overlaid with superalloy based on Haynes NiCro625 nickel. The overlay weld was overlaid using the MIG (131) method. The performed macro - and microscopic tests have shown the correct structure of the overlay weld without any welding unconformities. The examined overlay weld was characterized by a dendritic structure of the primary crystals accumulating towards the heat removal. It has been proved that the content of iron in the surface zone does not exceed 7%, and the steel-superalloy joint shows the highest properties in comparison with the materials joined.
 G. Golański, A. Zieliński, J. Słania, J. Jasak, Mechanical properties of VM12 steel after 30 000 hrs ageing at 600oC temperature, Arch. Metal. Mater. 4, 59, 1357 - 1360 (2014)
 T. Węgrzyn, J. Piwnik., Low alloy welding with micro-jet cooling, Arch. Metal. Mater. 2, 57, 540 - 543 (2012).
 A. Zieliński, J. Dobrzański, Characteristics of changes in properties and structure in X10CrMoVN b9-1 steel due to long-term impact temperatures and stress, Arch. Mater. Sc. Eng. 60, 2, 72 - 81 (2013).
 M.A. Uussitalo, P.M.J. Vuoristo, T.A. Mantyla, High temperature corrosion of coatings and boiler steels in reducing chlorine - containing atmosphere, Surf. Coat., Technol. 161, 275 - 285 (2002).
 J. Adamiec, A. Kierzak, Padding of the components of waste combustion boilers with the use nickel alloys, Inżynieria Materiałowa 4, 380 - 385 (2008).
 B. Mikułowski, Stopy żaroodporne i żarowytrzymałe - nadstopy, AGH Publ., Cracow 1997.
 M. Lachowicz, Microstructure analyses of the padding layers on superalloy Inconel 713C, Inzynieria Materiałowa 4, 525 -528 (2011).
 M. Lachowicz, W. Dudziński, M. Podrez - Radziszewska, TEM obserwation of the heat affected zone in electron beam welded superalloy Inconel 713C, Mater. Charac. 59, 560 - 566 (2008).
 M. Rozmus - Górnikowska, M. Blicharski, J. Kusiński, M. Paćko, L. Kusiński, M. Marszycki, Influence of boiler pipes cladding methods on their microstructure and properties, Hutnik -Wiadomości Hutnicze 4, 260 - 266 (2012).
 J. C. Lippold, S. D. Kimur, J. N. DuPont, Welding Metallurgy and Weldability of Nickel-Base Alloys, Wiley Publ. 2009.
 P. Adamiec, J. Adamiec, Aspects of pad welding of waste incineration boiler elements with Inconel 625 and 686 alloys, Welding Review 5 - 6, 11 - 14 (2006).
 J. Adamiec, Surfacing by welding elements of furnace for waste materiale burnning using nickel alloys, in Materials and technology for construction of supercritical boilers and waste planst, ed. A. Hernas, SIT PH Publ., 294 - 315, Katowice 2009.