CC-BY-NC-NDKarastojković, ZoranGusković, DragoslavRistić, OgnjenKovačević, Zorica2024-01-112024-01-112023978-86-6305-140-9https://ioc.tfbor.bg.ac.rs/public/2023/Proceedings_IOC_2023.pdfhttps://repozitorijum.tfbor.bg.ac.rs/handle/123456789/5795It is clearly established in metallurgy, also in service of machine elements or components, that non-metallic inclusions are not desired into metals, either they are ferrous or nonferrous. One of the main factor for such conclusion is in markably decreasing the plasticity with increasing an amount of the non-metallic contenst. Non-metallic inclusions were classified according to its nature, shape and dimensions, as many national standards were defined those properties. Sometimes is not simple to make a fully definition of the plasticity, as a property important both for cold or hot deformation processes, because many factors must be involved at the same time. One attempt for judging the plasticity of a steel was made by using a “relatively plasticity”.enelasticityplasticitynon-metallic inclusionsrelatively plasticity of steelconferenceObject