It is found that mis match of strength has an obvious affection on the FAC of weldments and the mis matching of strength of welded joints must be take into accouter by using CEGB/R6 method to assess the integrity of weldments.

• 材料组配对焊接接头的失效评定曲线有很大影响，因此，应用CEGB/R6的方法对接头进行完整性评价时，应考虑接头的材料组配情况。