In this paper, a J-COD design curve based on J-integral has been established, based onthe conservation franslating relationship between J-integral and CTOD. The J-COD designcurve of three materials (containing 16MnR、 A533B and 304 stainless steel) and two models(which are Elliptical Hole in Central Plate and Special Compact tension plate) have been pre-sented. By comparing J-COD design curve and COD design curve of CVDA-84, PD6493-80, as well as that of WES2805-83, the safety tolerance of the above COD design curvehave been evaluated.
