Mechanical Behavior in Buttering Weld Zone between Low Alloy Steel and Austenitic Stainless Steel

저합금강과 오스테나이트 스테인리스강의 버터링 이종용접부에서의 기계적 성질의 거동

It is important to evaluate strength of dissimilar weld zone to use dissimilar materials safely. This study examines mechanical characteristics of dissimilar weld zone between low alloy steel and austenitic stainless steel that satisfies welding related requirements of ASME Code, experimentally reviews metallurgical and mechanical properties at and adjacent to weld interface. It is confirmed that hardness singularity occurs at the weld interface, and that optimum buttering thickness is more than 5㎜ from view points of tensile & yield strength. From a macroscopic view, brittle fracture characteristics is observed in buttering weld zone by tensile test.