Abstract: To study the basic mechanical properties and welding procedures of high-strength stainless-clad bimetallic steel for railway steel bridges, a series of tests were conducted on the S31603+Q500 qE stainless-clad bimetallic steel plates and two types of butt joints. These tests included tensile, Charpy impact, cold bending and Vickers hardness tests. Additionally, shear and combine tests were performed on the bonding interface. Based on the test results, the tensile properties, interface bonding strength, and impact toughness for the high-strength stainless-clad bimetallic steel plate were determined, and their cold bending performance was verified. Furthermore, the tensile properties, impact toughness and Vickers hardness distribution patterns of the butt joints were obtained. The results demonstrate that the basic mechanical properties of the high-strength stainless-clad bimetallic steel meet the specification requirements. Meanwhile, the interfacial bonding strength significantly exceeds these requirements and increases with the strength of base material. The mechanical properties of the two butt joints show minimal differences, with both meeting the impact toughness specifications. However, the impact toughness and hardness distribution of joint WII are slightly lower at low temperatures, while joint WI shows relatively better impact toughness at low temperatures. These findings provide a reliable reference for simplifying the welding procedures for high-strength stainless-clad bimetallic steel.