1.1 ,These reference radiographs for gray iron castings consist of one set of illustrations of centerline shrinkage with severity levels 1 to 5 using three radiation source types as follows:
1.1.1 ,Volume I: Medium Voltage (nominal 250 kVp) X-ray Reference Radiographs—,Set of 5 severity levels in a 15 by 17 ,in. folder.