A　bimetallic　laminated　steel　structure　(BLSS)　was　manufactured　using　Arc-based　Direct　Energy　Deposition　(Arc-DED),　featuring　a　sandwich　structure　in　the　X-axis　and　a　fish　scale　weaving　structure　in　the　Y-axis.　The　microstructural　characteristics　and　mechanical　behavior　of　this　BLSS,　composed　of　ER120S-G　and　SS316L,　were　comprehensively　investigated.　The　microstructure　transitioned　from　equiaxed　and　cellular　in　ER120S-G　to　columnar　in　the　intermediate　region,　and　then　back　to　cellular　in　SS316L.　Significant　differences　were　observed　in　the　mechanical　properties　of　the　sample　between　the　X　and　Y　directions.　All　fractures　in　both　directions　exhibited　ductile　characteristics,　with　numerous　ductile　dimples　and　evidence　of　plastic　deformation.　The　BLSS　achieved　a　maximum　hardness　of　461HV,　surpassing　that　of　single　ER120S-G　samples.　Notably,　the　ultimate　tensile　strength　(UTS)　of　the　BLSS　reached　its　peak　at　1296　MPa　when　SS316L　was　centered　in　the　Y　direction,　which　was　34.7　%　higher　than　that　of　ER120S-G　samples.　In　BLSS　samples,　toughness　was　superior　when　SS316L　was　positioned　at　the　center　compared　to　when　ER120S-G　was　centered.　©　2024　Elsevier　B.V.