<p>The bimetallic casting process is a promising method for producing parts with dual properties for specialized applications by combining two different alloys. Welding, powder metallurgy, coating, and diffusion bonding are commonly used to obtain dual properties. Liquid–liquid technique offers the advantage of directly obtaining the component from a casting process but requires a careful selection of the alloys and processing parameters to obtain a sound joint with the desired properties. This study presents the development of a liquid–liquid joint between a low alloy steel and a 12wt%Cr white cast iron by controlling the melts temperatures, flows, and cooling rates during pouring to grow a continuous interface and the modification by heat treatment to obtain the desired hardness in both alloys without affecting the joins integrity. The results of this study represent a significant contribution to liquid–liquid processing in obtaining composite materials from a casting process for applications requiring dual properties.</p> Graphical abstract <p></p>