Impact ductility of girth joint of X70 pipeline steel was mainly affected by heat input, preheat temperature and thickness.The calculated results by using regression equation are in good agreem...

• X70管线钢环缝接头冲击韧性的影响因素主要为焊接热输入、预热温度和板厚,应用该数学模型计算的冲击吸收功与试验值符合较好。