Quality of the casting material is influenced by great numbers of material properties, metallurgical treatment, and particular solidification conditions too. In the case of solidification of heavy castings the properties and quality of the casting material are considerably changed in consequence of running segregation phenomena, worsen metal feeding conditions, and microporosity formation etc. It can even result in defaulting the required strengths and plasticity of the casting material. The work deals with changes of chemical composition and changes of mechanical properties in places with a long solidification time corresponding to them.
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