八三输油管道使用的是日本进口 T/S——52钢板,在国内焊制成φ720螺旋焊缝管。日方只提供了该钢板的化学成分及常温下的部分机械性能。石油部管道局为了对管道材料取得完整的数据资料,委托我院对该管道母材及焊缝进行机械性能、残余应力及断裂韧度的测定。本工作是其中任务之一,即测定管道母材及焊缝的延性断裂韧度。 83 pipelines used in Japan imported T / S - 52 steel, welded φ720 spiral welded pipe in the country. Japan only provides the chemical composition of the plate and some mechanical properties at room temperature. In order to obtain complete data of pipe materials, CNPC Pipeline Bureau entrusted our hospital to measure the mechanical properties, residual stress and fracture toughness of the pipe base metal and weld. This work is one of the tasks, namely the determination of ductile fracture toughness of the pipe base metal and weld.