The article introduces some experimental research results on the application of plasma welding technology’ when butt welding of SUS 304 stainless steel thin plates, using welding equipment of LINCOLN C3-MATIC 32-33 on a production scale industry in practical conditions in Vietnam. The quality of the weld is preliminarily assessed through the criteria of its surface morphology and the maximum deformation of the weld structure in the state after natural cooling in the air. The experimental results allow the limitation of the domain of in-depth investigation on the influence of key technological parameters on the mechanical properties and microscopic structure of the weld material, by means of an experimental design method as a basis science to determine the welding mode in accordance with the technical requirements of the mechanical product, which need to manufactured