Abstract <p>In this study, the interface bond strength of St/Al–B₄C circular composite materials obtained by combining steel and MMC material with the aim of high strength and low density was investigated. The sheath of the circular composite material was determined as AISI 4140, and the core was determined as Al2024/B₄C. The pre-product form of the composite materials was created by the powder-in-tube method. The final shaping of composites was carried out by the rod drawing method. Production parameters were B₄C particle size and reinforcement ratio, deformation extent, and rod drawing process temperature. The shear strengths of the composite materials were compared according to these variables. The results showed that the main factor increasing the interface bond strength was the deformation extent. Also, shear strength values decreased with the increase of process temperature. In the materials produced at low temperatures, the shear strength decreased with the increase of B₄C particle size. With the increase of B₄C reinforcement and reinforcement ratio, the shear strength values increased. However, the materials produced under room temperature conditions started to decrease at the ratio of 25% reinforcement.</p>