A New Standard for Radiographic Acceptance Criteria for Steel Castings

All components have performance limitations. These limitations are due to part design, part misuse, manufacturing practices and material characteristics. Non-destructive examination is specified by designers and users to ensure that the component purchased does not have features that would limit the component performance to less than the design requirement. Radiography can be used to detect internal features in castings. The features may have a higher or a lower density than the parent metal. These internal features are not necessarily the result of poor process control or defective material. Features detected by radiography may be rectified through further processing if the purchase requirement acceptance criteria would reject the component. Only when the component does not meet the purchase requirement when finished do the features that cause the nonconformance become defects (ASTM E1316-05).